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| 1 | 对建筑遗产基本问题的认知显示文摘作者基于理论与实践的思考,从基本概念范畴与问题的阐释出发,对建筑遗产保护与再生这一专业领域的发展主线、前沿及其中西语境差异,做了系统的梳理和整合。特别侧重对基本概念的歧义性,价值判定的多元性,保存与修复的矛盾性,以及中国建筑遗产的特征及保存与修复传统等,做了多向度的反思和论辩。此外,文章还从中西比较的视角,讨论了城市更新中的历史空间转化与再生问题。 | 常青 Jiang Tianyi Chen Chenand Li Yingchun | 2016 | 建筑遗产2016，0，1： | 88 |
| 2 | Aerodynamic Design Methodology for Blended Wing Body Transport显示文摘This paper puts forward a design idea for blended wing body(BWB).The idea is described as that cruise point,maximum lift to drag point and pitch trim point are in the same flight attitude.According to this design idea,design objectives and constraints are defined.By applying low and high fidelity aerodynamic analysis tools,BWB aerodynamic design methodology is established by the combination of optimization design and inverse design methods.High lift to drag ratio,pitch trim and acceptable buffet margin can be achieved by this design methodology.For 300-passenger BWB configuration based on static stability design,as compared with initial configuration,the maximum lift to drag ratio and pitch trim are achieved at cruise condition,zero lift pitching moment is positive,and buffet characteristics is well.Fuel burn of 300-passenger BWB configuration is also significantly reduced as compared with conventional civil transports.Because aerodynamic design is carried out under the constraints of BWB design requirements,the design configuration fulfills the demands for interior layout and provides a solid foundation for continuous work. | LI Peifeng ZHANG Binqian CHEN Yingchun YUAN Changsheng LIN Yu | 2012 | Chinese Journal of Aeronautics2012，25，4： | 29 |
| 3 | Whole-genome sequencing of 508 patients identifies key molecular features associated with poor prognosis in esophageal squamous cell carcinoma显示文摘Esophageal squamous cell carcinoma(ESCC)is a poor-prognosis cancer type with limited understanding of its molecular etiology.Using 508 ESCC genomes,we identified five novel significantly mutated genes and uncovered mutational signature clusters associated with metastasis and patients’outcomes.Several functional assays implicated that NFE2L2 may act as a tumor suppressor in ESCC and that mutations in NFE2L2 probably impaired its tumor-suppressive function,or even conferred oncogenic activities.Additionally,we found that the NFE2L2 mutations were significantly associated with worse prognosis of ESCC.We also identified potential noncoding driver mutations including hotspot mutations in the promoter region of SLC35E2 that were correlated with worse survival.Approximately 5.9%and 15.2%of patients had high tumor mutation burden or actionable mutations,respectively,and may benefit from immunotherapy or targeted therapies.We found clinically relevant coding and noncoding genomic alterations and revealed three major subtypes that robustly predicted patients’outcomes.Collectively,we report the largest dataset of genomic profiling of ESCC useful for developing ESCC-specific biomarkers for diagnosis and treatment. | Yongping Cui Hongyan Chen Ruibin Xi Heyang Cui Yahui Zhao Enwei Xu Ting Yan Xiaomei Lu Furong Huang Pengzhou Kong Yang Li Xiaolin Zhu Jiawei Wang Wenjie Zhu Jie Wang Yanchun Ma Yong Zhou Shiping Guo Ling Zhang Yiqian Liu Bin Wang Yanfeng Xi Ruifang Sun Xiao Yu Yuanfang Zhai Fang Wang Jian Yang Bin Yang Caixia Cheng Jing Liu Bin Song Hongyi Li Yi Wang Yingchun Zhang Xiaolong Cheng Qimin Zhan Yanhong Li Zhihua Liu-Show | 2020 | Cell Research2020，30，10： | 19 |
| 4 | Constrained large-eddy simulation and detached eddy simulation of flow past a commercial aircraft at 14 degrees angle of attack显示文摘With the development of computational power and numerical algorithms,computational fluid dynamics(CFD) has become an important strategy for the design of aircraft,which significantly reduces the reliance on wind-tunnel and flight tests.In this paper,we conducted a numerical investigation on the flow past a full commercial aircraft at Mach number 0.2 and 14 degrees angle of attack by means of Reynolds-averaged Navier-Stokes(RANS),detached-eddy simulation(DES) and our newly developed constrained large-eddy simulation(CLES).The objective of this paper is to study the capability of these models in simulating turbulent flows.To our knowledge,this is the first large-eddy simulation method for full commercial aircraft simulation.The results show that the CLES can predict the mean statistical quantities well,qualitatively consistent with traditional methods,and can capture more small-scale structures near the surface of the aircraft with massive separations.Our study demonstrates that CLES is a promising alternative for simulating real engineering turbulent flows. | CHEN ShiYi CHEN YingChun XIA ZhenHua QU Kun SHI YiPeng XIAO ZuoLi LIU QiuHong CAI QingDong LIU Feng LEE Cunbiao ZHANG RiKui CAI JinSheng | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，2： | 14 |
| 5 | Aquaporin JcPIP2 is Involved in Drought Responses in Jatropha curcas显示文摘水隧道蛋白质, aquaporins,在在植物的 transmembranewater 运动的戏基础角色。编码 aquaporin 的新全身的 cDNA 从 Jatropha curcas 的幼苗被孤立。质膜的基因从 J 的内在的蛋白质(果仁) 。curcas (JcPIP2 ) 包含了 843 bp 编码 280 氨基酸的蛋白质的开的读框架。氨基酸顺序与 Ricinus communis 果仁显示出 94% 身份。JcPIP2 互补 RNA intoXenopus 卵母细胞的注射增加了 10 褶层卵母细胞的渗透的水渗透。有 anti-JcPIP2 抗体的 Immunodetection ofJcPIP2 显示这蛋白质无所不在地位于植物的所有测试纸巾。调查在 aquaporins 和干旱抵抗 inJ 之间的关系。curcas,许多 JcPIP2 在二 J 的幼苗被检验。curcas 人口, GaoYouCSC63 和 YanBian S1,在有 PEG6000 的水赤字下面。在地条件下面,那些二张人口, GaoYou CSC63 是抵抗的浇赤字,而是 YanBian S1 是敏感的浇剥夺。与干旱应力的增加的度, JcPIP2 水平在幼苗 ofGaoYou CSC63 增加了,而在 YanBian S1 的幼苗没有重要变化。比较 withYanBian S1, GaoYou CSC63 也显示出更高的根在在水赤字下面的幼苗的水力的电导率和更低的减少趋势。这些结果显示 JcPIP2 可能在 J 在干旱抵抗起了一个作用。curcas。 | Ying ZHANG Yunxiao WANG Luding JIANG Ying XU Yingchun WANG Daihua LU Fang CHEN | 2007 | Acta Biochimica et Biophysica Sinica2007，39，10： | 13 |
| 6 | Statistic characteristics and weather significance of infrared TBB during May―August in Beijing and its vicinity显示文摘In order to meet the demand of nowcasting convective storms in Beijing, the climatological characteristics of convective storms in Beijing and its vicinity were analyzed based on the infrared (IR) temperature of black body (TBB) data during May―August of 1997―2004. The climatological probabilities, the diurnal cycle and the spatial distribution of convective storms are given respectively in this paper. The results show that the climatological characteristics of convective storms denoted by TBB≤-52℃ are consistent with those statistic studies based on the surface and lightning observations. Furthermore, the climatological characteristics of May and June are very different from those of July and August, showing that there are two types of convective storms in this region. One occurs in the transient polar air mass on the midlatitude continent during the late spring and early summer. This type of convection arises with thunder, strong wind gust and hail over the mountainous area in the northern part of this region from afternoon to nightfall, the other occurs with heavy rainfall in the warm and moist air mass over the North China Plain and vicinity of Bohai Sea. This study also shows that the long-term data of IR TBB observed by geostationary satellite can complement the temporal and spatial limitation of the weather radar and surface observations. | ZHENG YongGuang CHEN Jiong CHEN MingXuan WANG YingChun DING QingLan | 2007 | Chinese Science Bulletin2007，52，24： | 12 |
| 7 | Antimicrobial susceptibility of Gram-negative bacteria causing intra-abdominal infections in China: SMART China 2011显示文摘 | Zhang Hui Yang Qiwen Xiao Meng Chen Minjun Robert E. Badal Xu Yingchun | 2014 | Chinese Medical Journal2014，，13： | 10 |
| 8 | A Model Output Machine Learning Method for Grid Temperature Forecasts in the Beijing Area显示文摘In this paper, the model output machine learning (MOML) method is proposed for simulating weather consultation, which can improve the forecast results of numerical weather prediction (NWP). During weather consultation, the forecasters obtain the final results by combining the observations with the NWP results and giving opinions based on their experience. It is obvious that using a suitable post-processing algorithm for simulating weather consultation is an interesting and important topic. MOML is a post-processing method based on machine learning, which matches NWP forecasts against observations through a regression function. By adopting different feature engineering of datasets and training periods, the observational and model data can be processed into the corresponding training set and test set. The MOML regression function uses an existing machine learning algorithm with the processed dataset to revise the output of NWP models combined with the observations, so as to improve the results of weather forecasts. To test the new approach for grid temperature forecasts, the 2-m surface air temperature in the Beijing area from the ECMWF model is used. MOML with different feature engineering is compared against the ECMWF model and modified model output statistics (MOS) method. MOML shows a better numerical performance than the ECMWF model and MOS, especially for winter. The results of MOML with a linear algorithm, running training period, and dataset using spatial interpolation ideas, are better than others when the forecast time is within a few days. The results of MOML with the Random Forest algorithm, year-round training period, and dataset containing surrounding gridpoint information, are better when the forecast time is longer. | Haochen LI Chen YU Jiangjiang XIA Yingchun WANG Jiang ZHU Pingwen ZHANG | 2019 | Advances in Atmospheric Sciences2019，36，10： | 9 |
| 9 | A unified model for the formation and distribution of both conventional and unconventional hydrocarbon reservoirs显示文摘The discovery and large-scale exploration of unconventional oil/gas resources since 1980s have been considered as the most important advancement in the history of petroleum geology;that has not only changed the balance of supply and demand in the global energy market,but also improved our understanding of the formation mechanisms and distribution characteristics of oil/gas reservoirs.However,what is the difference of conventional and unconventional resources and why they always related to each other in petroliferous basins is not clear.As the differences and correlations between unconventional and conventional resources are complex challenging issues and very critical for resources assessment and hydrocarbon exploration,this paper focused on studying the relationship of formations and distributions among different oil/gas reservoirs.Drilling results of 12,237 exploratory wells in 6 representative petroliferous basins of China and distribution characteristics for 52,926 oil/gas accumulations over the world were applied to clarify the formation conditions and genetic relations of different oil/gas reservoirs in a petroliferous basin,and then to establish a unified model to address the differences and correlations of conventional and unconventional reservoirs.In this model,conventional reservoirs formed in free hydrocarbon dynamic field with high porosity and permeability located above the boundary of hydrocarbon buoyancy-driven accumulation depth limit.Unconventional tight reservoirs formed in confined hydrocarbon dynamic field with low porosity and permeability located between hydrocarbon buoyancy-driven accumulation depth limit and hydrocarbon accumulation depth limit.Shale oil/gas reservoirs formed in the bound hydrocarbon dynamic field with low porosity and ultra-low permeability within the source rock layers.More than 75%of proved reserves around the world are discovered in the free hydrocarbon dynamic field,which is estimated to contain only 10%of originally generated hydrocarbons.Most of undiscovered resources distributed in the confined hydrocarbon dynamic field and the bound hydrocarbon dynamic field,which contains 90%of original generated hydrocarbons,implying a reasonable and promising area for future hydrocarbon explorations.The buried depths of hydrocarbon dynamic fields become shallow with the increase of heat flow,and the remaining oil/gas resources mainly exist in the deep area of“cold basin”with low geothermal gradient.Lithology changing in the hydrocarbon dynamic field causes local anomalies in the oil/gas dynamic mechanism,leading to the local formation of unconventional hydrocarbon reservoirs in the free hydrocarbon dynamic field or the occurrence of oil/gas enrichment sweet points with high porosity and permeability in the confined hydrocarbon dynamic field.The tectonic movements destroy the medium conditions and oil/gas components,which leads to the transformation of conventional oil/gas reservoirs formed in free hydrocarbon dynamic field to unconventional ones or unconventional ones formed in confined and bound hydrocarbon dynamic fields to conventional ones. | Xiongqi Pang Chengzao Jia Junqing Chen Maowen Li Wenyang Wang Qinhong Hu Yingchun Guo Zhangxin Chen Junwen Peng Keyu Liu Keliu Wu | 2021 | Geoscience Frontiers2021，12，2： | 8 |
| 10 | Synthesis, mechanical investigation, and application of nitrogen and phosphorus co-doped carbon dots with a high photoluminescent quantum yield显示文摘有高 photoluminescent 量收益(PLQY ) 的做 Heteroatom 的碳点(CD ) 最近在化学传感器,光催化, bioimaging,和药交货中由于他们的应用吸引了注意。氮和磷在到在周期表的碳的靠近的最近并且是关键的在生物医学的成像的地里追踪元素。这二个元素改变 CD 的光、电子的性质并且帮助改进他们的 PLQY 的基本理解。这能也在 photoimaging 和 photothermal 治疗导致多功能的用法。然而,源于做 P 的 CD 的合成的大多数 PLQY 当前低于 50% 。这些 CD 在 bioimaging 和药交货的地里限制了实用性。在这研究,一个单个步的、高效率的热水的方法被使用综合氮和磷药的碳点((N, P ) 有有独立排放的多达 53.8% 的 PLQY 的 -CDs) 行为。而且, CD 在一个大 pH 范围上介绍了高 monodispersity,柔韧的刺激无关的光,和稳定性。分光镜的调查显示 PLQY (N, P ) CD 主要由于 P 的增加和氧化表面的钝化效果。优秀荧光性质(N, P ) CD 能被 Hg 2+ 离子有效地并且有选择地熄灭。如此的系统与一短反应时间在 0-900 nM 集中范围显示出线性回答,显示他们为化学和生物学的领域里的应用程序的潜力。 | Quan Xu Bofan Li Yingchun Ye Wei Cai Weijun Li Chuanyao Yang Yusheng Chen Meng Xu Neng Li Xusheng Zheng Jason Street Yan Luo Lulu Cai | 2018 | Nano Research2018，11，7： | 7 |
| 11 | Molecular dynamics simulations of thermal effects in nanometric cutting process显示文摘Understanding the basic action of how material removing in nanoscale is a critical issue of producing well-formed components.In order to clarify thermal effects on material removal at atomic level,molecular dynamics(MD)simulations of nanometric cutting of mono-crystalline copper are performed with Morse,EAM and Tersoff potential.The effects of cutting speed on temperature distribution are investigated.The simulation results demonstrate that the temperature distribution shows a roughly concentric shape around shear zone and a steep temperature gradient lies in diamond tool,a relative high temperature is located in shear zone and machined surface,but the highest temperature is found in chip.At a high cutting speed mode,the atoms in shear zone with high temperature implies a large stress is built up in a local region. | GUO YongBo,LIANG YingChun,CHEN MingJun,BAI QingShun&LU LiHua Precision Research Engineering Institute,Harbin Institute of Technology,Harbin 150001,China | 2010 | Science China(Technological Sciences)2010，53，3： | 7 |
| 12 | Visible light photodegradation of methylene blue by AgBr-TiO_2/SiO_2@Fe_3O_4 magnetic photocatalysts显示文摘Visible photoactive AgBr/TiO_2 was immobilized on a SiO_2@Fe_3O_4 magnetic support by solvothermal and sol-gel methods to form a AgBr-TiO_2/SiO_2@Fe_3O_4 magnetic photocatalyst.Samples were characterized by X-ray diffraction,high-resolution transmission electron microscopy and magnetometry.Hetero-structured AgBr/TiO_2 was well seeded on the shell-core SiO_2@Fe_3O_4 structure.The AgBr-TiO_2/SiO_2@Fe_3O_4 magnetic photocatalyst exhibited high photocatalytic activity in the degradation of methylene blue under visible light.The photocatalyst was superparamagnetic,which is beneficial for facile magnetic separation. | Jianjun Liu Shengli Zuo Liming Yu Yingchun Yu Baoshan Li Pengwan Chen | 2013 | Particuology2013，11，6： | 7 |
| 13 | Atomic-scaled surface engineering Ni-Pt nanoalloys towards enhanced catalytic efficiency for methanol oxidation reaction显示文摘Surface engineering is known as an effective strategy to enhance the catalytic properties of Pt-based nanomaterials.Herein,we report on surface engineering Ni-Pt nanoalloys with a facile method by varying the Ni doping concentration and oleylamine/oleicacid surfactant-mix.The alloy-composition,exposed facet condition,and surface lattice strain are,thereby manipulated to optimize the catalytic efficiency of such nanoalloys for methanol oxidation reaction(MOR).Exemplary nanoalloys including Ni_(0.69)Pt_(0.31)truncated octahedrons,Ni_(0.45)Pt_(0.55)nanomultipods and Ni_(0.20)Pt_(0.80)nanoflowers are thoroughly characterized,with a commercial Pt/C catalyst as a common benchmark.Their variations in MOR catalytic efficiency are significant:2.2 A/mgPt for Ni_(0.20)Pt_(0.80)nanoflowers,1.2 A/mgPt for Ni_(0.45)Pt_(0.55)nanomultipods,0.7 A/mgPt for Ni_(0.69)Pt_(0.31)truncated octahedrons,and 0.6 A/mgPt for the commercial Pt/C catalysts.Assisted by density functional theory calculations,we correlate these observed catalysis-variations particularly to the intriguing presence of surface interplanar-strains,such as{111}facets with an interplanar-tensile-strain of 2.6%and{200}facets with an interplanar-tensile-strain of 3.5%,on the Ni_(0.20)Pt_(0.80)nanoflowers. | Aixian Shan Shuoyuan Huang Haofei Zhao Wengui Jiang Xueai Teng Yingchun Huang Chinping Chen Rongming Wang Woon-Ming Lau | 2020 | Nano Research2020，13，11： | 6 |
| 14 | Multiscale simulation of nanometric cutting of single crystal copper——effect of different cutting speeds显示文摘A multiscale simulation has been performed to determine the effect of the cutting speed on the deformation mechanism and cutting forces in nanometric cutting of single crystal copper.The multiscale simulation model,which links the finite element method and the molecular dynamics method,captures the atomistic mechanisms during nanometric cutting from the free surface without the computational cost of full atomistic simulations.Simulation results show the material deformation mechanism of single crystal copper greatly changes when the cutting speed exceeds the material static propagation speed of plastic wave.At such a high cutting speed,the average magnitudes of tangential and normal forces increase rapidly.In addition,the variation of strain energy of work material atoms in different cutting speeds is investigated. | Hongmin PEN Qingshun BAI Yingchun LIANG Mingjun CHEN | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，6： | 6 |
| 15 | Seasonal variations of carboxylic acids and their contributions to the rainwater acidity: A case study of Guiyang and Shangzhong,China显示文摘Low molecule weight carboxylic acids are ubiquitous and important chemical constituents in the troposphere.Seven carboxylic acids in the rainwater of Guiyang and Shangzhong were simultaneously determined by ion chromatography from April 2006 to April 2007.Formic, acetic and oxalic acids were found to be the predominant carboxylic acids.Their volume weighted average concentration (VWA) in the rainwater of Guiyang were 14.24 μmol/L, 9.35 μmol/L and 2.79 μmol/L, respectively;as compared to 4.95 μmol/L, 1.35 μmol/L and 2.31 μmol/L in the rainwater of Shangzhong.In Shangzhong it is witnessed that the concentra-tions of these acids were higher in the summer than in the winter and direct emissions from vegetations or soils may account for the main provenance of the acids.This is, however, not the case in Guiyang, where the concentrations of the carboxylic acids were higher during the non-growing season than during the growing season.The relatively weak scavenging affected by scarce and little rainwater as well as the particles accompanied with the rainfall may have some effect on the carboxylic acids during the wintertime in Guiyang.Carboxylic acids in the rainwater of Guiyang were estimated to account for 18.7% to the free acidity, where formic, acetic and oxalic acids accounted for 7.9%, 4.7%, 6.1%, respectively.In Shangzhong, the 3 primary carboxylic acids represented 58.1% to the free acidity where formic, acetic and oxalic acids represented 25.1%, 7.5%, 25.5%, respectively.Carboxylic anions accounted for 6.6% (1.7%–19.2%) to the total anions in the rainwater of Guiyang.Carboxylic anions repre-sented 13.2% (0.5%–92.2%) to the total anions in the rainwater of Shangzhong.These results indicated that carboxylic acids were the important contributors to the rainwater acidity, especially in remote regions. | XU Gang LEE XinQing LU YingChun CHEN YingJun HUANG DaiKuan | 2010 | Chinese Science Bulletin2010，55，16： | 5 |
| 16 | Low dose bisphenol A impairs spermatogenesis by suppressing reproductive hormone production and promoting germ cell apoptosis in adult rats显示文摘Bisphenol A (BPA), an estrogenic chemical, has been shown to reduce sperm count; however, the underlyingmechanisms remain unknown. Herein, we show that oral administration of BPA (2 μg/kg) for consecutive 14 daysin adult rats (BPA rats) significantly reduced the sperm count and the number of germ cells compared to controls.The serum levels of testosterone and follicle-stimulating hormone (FSH), as well as the level of GnRH mRNA inBPA rats were lower than those of control rats. Testosterone treatment could partially rescue the reduction of germcells in BPA rats. Notably, the number of apoptotic germ cells was significantly increased in BPA rats, which wasinsensitive to testosterone. Furthermore, the levels of Fas, FasL and caspase-3 mRNA in the testicle of BPA ratswere increased in comparison with controls. These results indicate that exposure to a low dose of BPA impairsspermatogenesis through decreasing reproductive hormones and activating the Fas/FasL signaling pathway. | Pengpeng Jin Xiaoli Wang Fei Chang Yinyang Bai Yingchun Li Rong Zhou Ling Chen | 2013 | The Journal of Biomedical Research2013，27，2： | 5 |
| 17 | Switchable regioselectivity in amine-catalysed asymmetric cycloadditions显示文摘Subject Code:B02 With the support by the National Natural Science Foundation of China,a collaborative study by the research groups led by Prof.Chen Yingchun(陈应春)from Sichuan University and Dr.Ouyang Qin(欧阳勤)from the Third Military Medical University demonstrates switchable regioselective[6+2]。 | Chen Yingchun (陈应春) Ouyang Qin (欧阳勤) | 2017 | Science Foundation in China2017，25，2： | 4 |
| 18 | Investigation of micro vortex generators on controlling flow separation over SCCH high-lift configuration显示文摘For the problem that the flow separation on the flap lowers the aerodynamic performance of high lift system,an investigation was carried out on using micro vortex generators(VGs) to control the separation on flap of the swept constant chord half-model(SCCH) high-lift configuration,at a small to medium angle of attack,by experimental and numerical methods.The basic flow characteristics of SCCH landing configuration were analyzed by using numerical method to provide required information for the design of micro VGs.Then,by keeping the cruise configuration intact,the preliminary design procedure and design methods of micro VGs were established.In addition,the micro VGs were designed.The effects of VG's arrangement and geometric parameters,such as the arrangement mode,chordwise position,arrangement angle,height and spanwise distance,on controlling efficiency were investigated by using numerical method.Then the parameters of preliminary VGs were adjusted as the basis configuration for wind tunnel test.The experiments were accomplished in NH-2 wind tunnel for validating the numerical method,as well as obtaining the design principles and methods of micro VGs.The parameters of VGs were also optimized based on the experiments.The experimental results showed that the numerical design method can serve as an efficient and accurate design tool.The lift and drag were increased by 10% and 14%,respectively in landing state,which satisfied the requirements for landing.Finally,it was concluded that the established design principles and methods for micro VGs in this investigation can be used in engineering application. | CHU HuBing ZHANG BinQian CHEN YingChun LI YaLin MAO Jun | 2012 | Science China(Technological Sciences)2012，55，7： | 4 |
| 19 | Mea6 controls VLDL transport through the coordinated regulation of COPil assembly显示文摘 | Yaqing Wang Liang Liu Hongsheng Zhang Junwan Fan FengZhang Mei Yu Lei Shi Lin Yang Sin Man Lam Huimin Wang Xiaowei Chen Yingchun Wang Fei Gao Guanghou Shui Zhiheng Xu | 2016 | Cell Research2016，26，7： | 4 |
| 20 | Cold spray additive manufacturing of Invar 36 alloy:microstructure,thermal expansion and mechanical properties显示文摘In this work,the Invar 36 alloys were manufactured using cold spray(CS)additive manufacturing technique.The systematic investigations were made on the microstructural evolution,thermal expansion and mechanical properties under as-sprayed(AS)and heat-treated(HT)conditions.XRD(X-ray diffraction)and ICP-AES(inductively coupled plasma atomic emission spectroscopy)analyses show that no phase transformation,oxidation,nor element content change have occurred.The X-ray computed tomography(XCT)exhibited a near fully dense structure with a porosity of 0.025%in the helium-produced sample under as-sprayed condition,whereas the nitrogen-produced samples produced at 5 MPa and 800℃show more irregular pore defects.He-AS sample shows a more prominent grain refinement than that of nitrogen samples due to the more extensive plastic deformation.The post heat-treatment exhibited a promoted grain growth,inter-particle diffusion,as well as the formation of annealing twins.Between25℃and 200℃,the nitrogen samples possessed lower CTE(coefficient of thermal expansion)values(1.53×10^(-6)/℃)compared with those produced by casting and laser additive manufacturing.The He-AS samples exhibited a noticeable negative CTE value between 25℃and 200℃,which may due to the significant compressive residual stress(-272 MPa)compensating its displacement with temperature increase during CTE test.The N2-HT and He-HT Invar 36 samples present a notable balance between strength and ductility.In conclusion,the CS technique can be considered as a potential method to produce the Invar36 component with high thermal and mechanical performance. | Chaoyue Chen Yingchun Xie Longtao Liu Ruixin Zhao Xiaoli Jin Shanqing Li Renzhong Huang Jiang Wang Hanlin Liao Zhongming Ren | 2021 | Journal of Materials Science & Technology2021，，13： | 4 |
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