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| 1 | Effect of processing parameters on the densification of an additively manufactured 2024 Al alloy显示文摘Understanding the densification behaviours and formation mechanisms of defects are essential to fabricate high quality and high strength aluminium components using selective laser melting(SLM) technology. In this work, the effects of laser power and scanning speed on the densification, defects evolution and their formation mechanisms in a SLMed 2024 aluminium(Al) alloy were investigated in consideration of the corresponding laser energy input, melting mode transition and microstructural evolution. The results showed that optimizing the processing parameters effectively reduced the porosity level below1% by avoiding the lack of fusion and keyhole melting mode, and minimizing the gas pores. However,optimization of the processing parameters could not eliminate the columnar structure associated with the SLMed 2024 Al alloy, which contributed to the hot-tearing cracks in the SLMed parts. It was found that the dependence of porosity formation on SLM processing parameters was contrary to the crack density. Hence, to further improve the SLM-processability of the 2024 Al alloy it is necessary to develop SLM methods in order avoid the hot-cracking within the optimized processing parameter window associated with the minimum porosity formation. | Qiyang Tan Yingang Liu Zhiqi Fan Jingqi Zhang Yu Yin Ming-Xing Zhang | 2020 | Journal of Materials Science & Technology2020，58，23： | 13 |
| 2 | Efficient Fe based catalyst with nitrogen doped carbon material modification for propane non-oxidative dehydrogenation显示文摘Nitrogen doped carbon species(NC)was introduced into Fe based catalyst and applied into propane non-oxidative dehydrogenation.With characterizations of XRD,TEM and XPS,it was deduced that the NC modification induces the electrons transferred from NC species to Fe species,leading to electron-rich Fe species.Consequently,propane conversion and propene selectivity were increased by suppressing the by-products formation.It was also confirmed that such a modification strategy could be also extended to ones with different supports,iron precursors,and NC precursors. | Yuming Li Qiyang Zhang Xue Yu Guiling Jiang Yajun Wang Guiyuan Jiang Zhen Zhao Chunming Xu State | 2020 | Carbon Resources Conversion2020，3，1： | 1 |
| 3 | Spheroidization behaviour of a Fe-enriched eutectic high-entropy alloy显示文摘A cost-effective Fe-enriched eutectic high-entropy alloy(EHEA),Fe35Ni25Cr25Mo15,was designed and prepared to avoid the use of expensive Co that is commonly used in HEAs.However,the as-cast Feenriched EHEA was associated with brittleness.The present work aims to evaluate the possibility and feasibility of spheroidization of the lamellar structure of the EH EA in order to improve the ductility.Due to the high cooling rate of arc-melting,the as-melted Fe35Ni25Cr25Mo15 EHEA was found to be a pseudo eutectic alloy comprised of alternantσphase(Cr(0.22)Mo0.18Fe0.6-type intermetallic)and face centred cubic(FCC)phase.The lamellar structure in the Fe-enriched EHEA remained stable up to 800Κ.The instability of the lamellar structure occurred at temperatures over 800℃,which was resulted from migration of high-density faults(i.e.lamellar termination and ledges in the lamellae).However,the Fe35Ni25Cr25Mo15EHEA still exhibited brittleness even after spheroidization at 1100℃for 168 h due to the formation of the hard and brittleσmatrix in the pseudo Fe35Ni25Cr25Mo15 EHEA as a result of decomposition of the lamellar structure.Therefore,in contrast to the softening of traditional eutectic alloys,spheroidization treatment was considered as invalid to improve the ductility of pseudo-eutectic HEA with high fraction of intermetallic phase.The present work provides a valuable re ference for those who aim to improve the ductility of brittle EHEA through spheroidization. | Yu Yin Damon Kent Qiyang Tan Michael Bermingham Ming-Xing Zhang | 2020 | Journal of Materials Science & Technology2020，47，16： | 1 |
| 4 | The First Verification Test of Space-Ground Collaborative Intelligence via Cloud-Native Satellites显示文摘Recent advancements in satellite technologies and the declining cost of access to space have led to the emergence of large satellite constellations in Low Earth Orbit(LEO).However,these constellations often rely on bent-pipe architecture,resulting in high communication costs.Existing onboard inference architectures suffer from limitations in terms of low accuracy and inflexibility in the deployment and management of in-orbit applications.To address these challenges,we propose a cloud-native-based satellite design specifically tailored for Earth Observation tasks,enabling diverse computing paradigms.In this work,we present a case study of a satellite-ground collaborative inference system deployed in the Tiansuan constellation,demonstrating a remarkable 50%accuracy improvement and a substantial 90%data reduction.Our work sheds light on in-orbit energy,where in-orbit computing accounts for 17%of the total onboard energy consumption.Our approach represents a significant advancement of cloud-native satellite,aiming to enhance the accuracy of in-orbit computing while simultaneously reducing communication cost. | Wang Shangguang Zhang Qiyang Xing Ruolin Qi Fei Xu Mengwei | 2024 | China Communications2024，21，4： | 0 |
| 5 | Sulfur-induced dynamic reconstruction of iron-nitrogen species for highly active neutral oxygen reduction reactions显示文摘The neutral oxygen reduction reaction(ORR)has attracted tremendous attention for its broad prospects in next-generation power storage systems.However,the extremely sluggish cathodic reaction process and the limited cognition of the reaction mechanism greatly hinder its practical application.Here,we demonstrate a dynamic reconstruction behavior induced by sulfur of the iron-nitrogen(Fe-Nx)species in neutral solution.Our developed FeS_(1)N_(3)-OH configuration effectively optimizes the reaction kinetics by regulating the adsorption energy of oxygen intermediates for central catalytic sites.Consequently,this structure exhibits over 363%enhancement in ORR mass activity compared to the pristine FeN_(4) sites under neutral electrolyte.Moreover,a neutral zinc-air battery assembled with this electrocatalyst reached an ultrahigh peak power density(81.2 mW cm^(−2)),robust stability(more than 100 h)as well as superior tolerance to extreme environments(operating between−20°C and 60°C),representing a critical breakthrough for neutral ORR exploration and application. | Wenjie Wang Tianpei Zhou Kai Zhang Chun Wang Xiang Shi Lin Wang Qinghua Liu Yang Wang Qiyang Jiao Guixin Ma Chen Ye Yi Xie Xiaojun Wu Wangsheng Chu Changzheng Wu | 2022 | Science China Chemistry2022，65，12： | 0 |
| 6 | Heterogeneous lamella design to tune the mechanical behaviour of a new cost-effective compositionally complicated alloy显示文摘A heterogeneous lamella(HL)design strategy was applied to manipulate mechanical properties of a new cost-effective Fe_(35)Ni_(35)Cr_(25)Mo_(5)compositionally complicated alloy(CCA).The HL structure was produced by single-step heat treatment(800℃for 1 h)after cold rolling.This HL structure consists of alternative lamellae regions of coarse-grained FCC matrix(5-20μm),and regions containing ultra-fine grains or subgrains(200-500 nm)together with nanoprecipitates(20-500 nm)and annealing twins.As compared with other cost-effective CCAs,the 800℃annealed sample with HL structure demonstrated a comparable tensile property,with yield strength over 1.0 GPa and total elongation of~13%.Formation of the annealing twins and nanoprecipitates decorated HL structure was a result of the concurrent partial recrystallization and precipitation ofσphase at the shear bands with a high density of lattice defects(e.g.high-density dislocation walls and deformation twins).The latter restricted the growth of recrystallized grains,leading to the formation of ultrafine subgrains within the HL structure.The high yield strength resulted from the multistage hetero-deformation induced(HDI)strengthening and precipitation strengthening associated with heterogeneous lamella structures containing nanoprecipitates.The ductility was originated from the coexistence of multiple deformation mechanisms,which started with dislocation slip and formation of stacking faults at the initial stage,followed by nano-twinning at the higher strain level.This HL design strategy,comprising composition and thermomechanical process designs,and the resultant microstructure tuning,open a broader window for the development of cost-effective CCAs with enhanced performance. | Yu Yin Qiyang Tan Qiang Sun Wangrui Ren Jingqi Zhang Shiyang Liu Yingang Liu Michael Bermingham Houwen Chen Ming-Xing Zhang | 2022 | Journal of Materials Science & Technology2022，，1： | 0 |
| 7 | 人乳头瘤病毒衣壳蛋白C末端结构臂具有免疫原性并参与病毒-宿主细胞的相互作用显示文摘宫颈癌是全球女性第二大常见恶性肿瘤,人乳头瘤病毒(HPV)是导致女性宫颈癌发生的主要原因。HPV型别众多,主要的高危型型别种类多达15种,且型别间免疫血清交叉保护能力极低,目前国际上已上市的预防性多价HPV疫苗均不能为接种者提供完全保护。 | Zhihai Li Xiaodong Yan Hai Yu Daning Wang Shuo Song Yunbing Li Maozhou He Qiyang Hong Qingbing Zheng Qinjian Zhao Ying Gu Jun Zhang Mandy E.W.Janssen Giovanni Cardone Norman H.Olson Timothy S.Baker 李少伟 Ningshao Xia | 2017 | 科学新闻2017，19，4： | 0 |
| 8 | Li^(+)-ion bound crown ether functionalization enables dual promotion of dynamics and thermodynamics for ambient ammonia synthesis显示文摘Electrosynthesis of ammonia from the reduction of nitrogen is still confronted with the limited supply of gas reactant in dynamics as well as high activation barrier in thermodynamics.Unfortunately,despite tremendous efforts devoted to electrocatalysts themselves,they still fail to tackle the above two challenges simultaneously.Herein,we employ a heterogeneous catalyst adlayer-composed of crown ethers associated with Li^(+)ions-to achieve the dual promotion of dynamics and thermodynamics for ambient ammonia synthesis.Dynamically,the bound Li^(+)ions interact with the strong quadrupole moment of nitrogen,and trigger considerable reactant flux toward the catalyst.Thermodynamically,Li^(+)associated with the oxygen of crown ether achieves a higher density of states at the Fermi level for the catalyst,enabling effortless electron transfer from the catalysts to nitrogen and thus greatly reducing the activation barrier.As expected,the proof-of-concept system achieves an ammonia yield rate of 168.5μg h^(-1)mg^(-1)and a Faradaic efficiency of 75.3%at-0.3 V vs.RHE.This system-level approach opens up pathways for tackling the two key challenges that have limited the field of ammonia synthesis. | Qiyang Cheng Sisi Liu Mengfan Wang Lifang Zhang Yanzheng He Jiajie Ni Jingru Zhang Chengwei Deng Yi Sun Tao Qian Chenglin Yan | 2023 | Journal of Energy Chemistry2023，，10： | 0 |
| 9 | Comprehensive understanding and rational regulation of microenvironment for gas-involving electrochemical reactions显示文摘Substantial progress has been made in the understanding of gas-involving electrochemical reactions recently for the sake of clean,renewable,and efficient energy technologies.However,the specific influence mechanism of the microenvironment at the reaction interface on the electrocatalytic performance(activity,selectivity,and durability)remains unclear.Here,we provide a comprehensive understanding of the interfacial microenvironment of gas-involving electrocatalysis,including carbon dioxide reduction reaction and nitrogen reduction reaction,and classify the factors affecting the reaction thermodynamics and kinetics into gas diffusion,proton supply,and electron transfer.This categorization allows a systematic survey of the literature focusing on electrolyzer-level(optimization of the device,control of the experimental condition,and design of the working electrode),electrolytelevel(increase of gas solubility,regulation of proton supply,and substitution of anodic reaction),and electrocatalyst-level strategies(promotion of gas affinity,adjustment of hydrophobicity,and enhancement of conductivity),aiming to retrieve the correlations between the microenvironment and electrochemical performance.Finally,priorities for future studies are suggested to support the comprehensive improvement of next-generation gas-involving electrochemical reactions. | Qiyang Cheng Mengfan Wang Jiajie Ni Lifang Zhang Yu Cheng Xi Zhou Yufeng Cao Tao Qian Chenglin Yan | 2023 | Carbon Energy2023，5，7： | 0 |
| 10 | MODIFICATION EFFECT OF Sr ON Al-Si ALLOYS显示文摘By inserting the single crystal silicon seeds into Sr modified Al-22wt-% Si alloy melts,thefact that nucleation and growth of Si-phase are affected by Sr addition has been confirmed.Itis suggested that this effect is caused by the adsorption of Sr on{111}si,and the modificationof eutectic structure results from the variation of leading phase in the eutectic from Si to α-Al. | LIU Qiyang LI Qingchun ZHANG Jiren Harbin Institute of Technology,Harbin,China LIU Qiyang,Division of Foundry,Department of Mechanical Engineering No.2,South China University of Technology,Guangzhou,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，7： | 0 |
| 11 | Recent progress in additive manufacturing of bulk MAX phase components:A review显示文摘The MAX phases are a group of layered ternary,quaternary,or quinary compounds with characteristics of both metals and ceramics.Over recent decades,the synthesis of bulk MAX phase parts for wider engineering applications has gained increasing attention in aerospace,nuclear,and defence industries.The recent adoption of additive manufacturing(AM)technologies in MAX phase fabrication is a step forward in this field.This work overviews the recent progress in additive manufacturing(AM)of bulk MAX phases along with the achieved geometric features,microstructures,and properties after briefing the conventional powder sintering methods of fabricating MAX phase components.Critical challenges associated with these innovative AM-based methods,including,poor AM processability,low MAX phase purity,and insufficient geometric accuracy of the final parts,are also discussed.Accordingly,outlooks for the immediate future in this area are discussed based on the optimization of present fabrication routes and the potential of other AM technologies. | Qiyang Tan Wyman Zhuang Marco Attia Richard Djugum Mingxing Zhang | 2022 | Journal of Materials Science & Technology2022，，36： | 0 |
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