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| 1 | Effect mechanisms of micro-alloying element La on microstructure and mechanical properties of hypoeutectic Al-Si alloys显示文摘The rare earth influence on the as-cast micro structures and mechanical properties of aluminum alloys attracted great attentions in the last decades.But up to date no reports can be found on the effect of microalloying element La(La addition is below 0.1 wt.%) on the solidification of hypoeutectic Al-Si alloys.This study carried out solidification experiments with Al-6 Si alloys micro-alloyed by element La.The α-Al grain refinement,the eutectic Si modification and the tensile properties improvement caused by microalloying element La were investigated.The effect mechanisms of La were discussed.It is demonstrated that the addition of La as low as 100 ppm can deprave the more effective heterogeneous nucleation conditions for the eutectic Si caused by the impurity P.The addition of 0.06 wt.% La is sufficient to achieve an ideal α-Al grain refinement,eutectic Si modification and ductility improvement of the alloys.LaAlSi phase forms in the Al-Si alloy with the additive amount of La higher than 0.06 wt.%.It has a tetragonal structure.Micro-alloying element La refines the α-Al grains by working as a surfactant and modifies the eutectic Si by promoting the formation of the significant multiple Si twins. | Qiuju Zheng Lili Zhang Hongxiang Jiang Jiuzhou Zhao Jie He | 2020 | Journal of Materials Science & Technology2020，47，12： | 18 |
| 2 | Microstructure formation and electrical resistivity behavior of rapidly solidified Cu-Fe-Zr immiscible alloys显示文摘The immiscible Cu-Fe alloy was characterized by a metastable miscibility gap.With the addition element Zr,the miscibility gap can be extended into the Cu-Fe-Zr ternary system.The effect of the atomic ratio of Cu to Fe and Zr content on the behavior of liquid-liquid phase separation was studied.The results show that liquid-liquid phase separation into Cu-rich and Fe-rich liquids took place in the as-quenched Cu-Fe-Zr alloy.A glassy structure with nanoscale phase separation was obtained in the as-quenched(Cu0.5Fe0.5)40Zr60 alloy sample,exhibiting a homogeneous distribution of glassy Cu-rich nanoparticles in glassy Fe-rich matrix.The microstructural evolution and the competitive mechanism of phase formation in the rapidly solidified Cu-Fe-Zr system were discussed in detail.Moreover,the electrical property of the as-quenched Cu-Fe-Zr alloy samples was examined.It displays an abnormal change of electrical resistivity upon temperature in the nanoscale-phase-separation metallic glass.The crystallization behavior of such metallic glass has been discussed. | Xiaojun Sun Jie He Bin Chen Lili Zhang Hongxiang Jiang Jiuzhou Zhao Hongri Hao | 2020 | Journal of Materials Science & Technology2020，44，9： | 5 |
| 3 | Solidification Behavior of Immiscible Alloys under the Effect of a Direct Current显示文摘Directional solidification experiments were carried out with Al—Pb alloys under the effect of a direct current(DC).The experimental results show that the DC causes a migration of the minority phase droplets(MPDs) from the middle part to the surface region of the sample.Samples with either a finely dispersed microstructure or a shell/core structure were obtained by solidifying the alloy under the effect of the properly selected DC densities.A model was developed to describe the microstructure evolution in an immiscible alloy directionally solidified under the effect of the DC.The microstructure formation in the Al—Pb alloys was calculated.The numerical results are in favorable agreement with the experimental ones.They demonstrate that the DC affects the microstructure formation mainly through changing the spatial motions of the MPDs and the temperature field of the melt in front of the solid/liquid interface.The formation mechanisms of the finely dispersed microstructure as well as the shell/core structure were sufficiently clarified. | Hongxiang Jiang Jiuzhou Zhao Jie He | 2014 | Journal of Materials Science & Technology2014，30，10： | 4 |
| 4 | Materials Experiment on Tiangong-2 Space Laboratory显示文摘During the China's Tiangong-2(TG-2) flight mission, the experiments of 18 kinds of material samples were conducted in space by using a Multiple Materials Processing Furnace(MMPF) mounted in the orbital module of the TG-2 space laboratory. After the experiments of 12 kinds of samples of the first and second batches were completed successfully, astronauts packed and brought them back to the ground by ShenzhouII spacecraft. By studying processing and formation on semiconductor and optoelectronics materials, metal alloys and metastable materials, functional single-crystal, micro-and nano-composite materials encapsulated in sample ampoules both in space and on Earth, we expect to explore some physical and chemical processes and mechanism of the materials formation that are normally obscured and therefore are difficult to study quantitatively on the ground due to the gravity-induced convection, to obtain the processing and synthesis technology for preparing high quality materials, and lead to the improvement and development of materials processing techniques on Earth, and also develop the experiment device and comprehensive ability for materials experiment in microgravity environment. This report briefly introduces the main points of each research work and preliminary comparative analysis results of 12 samples carried out by scientists undertaking research task. | LI Xiangyang LU Ye MENG Xiangjian WANG Jianlu WANG Reng CHEN Lidong HUA Zile LI Xiaoya SHI Jianlin LIU Jinfeng XU Guisheng WEI Bingbo XIE Wenjun YIN Zhigang ZHANG Xingwang JIANG Hongxiang LI Hong LUO Xinghong ZHANG Haifeng ZHAO Jiuzhou WANG Binbin PAN Mingxiang | 2018 | 空间科学学报2018，38，5： | 4 |
| 5 | Effect of micro-alloying La on precipitation behavior, mechanical properties and electrical conductivity of Al-Mg-Si alloys显示文摘The rapid industrial development calls for alloys that possess higher comprehensive properties. In this study, the effect of microalloying La addition on the precipitation behavior during artificial aging as well as the mechanical properties and electrical conductivity of Al-Mg-Si alloys were investigated by thermal analysis, microstructural characterizations and properties tests.The results demonstrated that micro-alloying La addition does not change the whole precipitation sequence during the artificial aging of Al-Mg-Si alloys as well as the atomic structure of the precipitates. However, the higher La-vacancy binding energy as well as the strong La-Si and La-Mg interactions can decrease the solubility of Si and Mg in the Al matrix and the β″ precipitation activation energy from 89.9 to 76.7 kJ/mol, leading to the improvement of the strength and electrical conductivity of Al-Mg-Si alloys simultaneously. The microstructural features affecting the strength and electrical conductivity were theoretically discussed in terms of the La addition. | ZHENG QiuJu JIANG HongXiang HE Jie ZHANG LiLi ZHAO JiuZhou | 2021 | Science China(Technological Sciences)2021，64，9： | 3 |
| 6 | miRNA-dysregulation associated with tenderness variation induced by acute stress in Angus cattle显示文摘miRNAs are a class of small, single-stranded, non-coding RNAs that perform post-transcriptional repression of target genes by binding to 3' untranslated regions. Research has found that miRNAs involved in the regulation of many metabolic processes. Here we uncovered that the beef quality of Angus cattle sharply diversified after acute stress. By performing miRNA microarray analysis, 13 miRNAs were significantly differentially expressed in stressed group compared to control group. Using a bioinformatics method, 135 protein-coding genes were predicted as the targets of significant differentially expressed miRNAs. Gene Ontology (GO) term and Ingenuity Pathway Analysis (IPA) mined that these target genes involved in some important pathways, which may have impact on meat quality and beef tenderness. | Chunping Zhao Fei Tian Ying Yu George Liu Linsen Zan M Scott Updike Jiuzhou Song | 2012 | Journal of Animal Science and Biotechnology2012，3，2： | 2 |
| 7 | Coarsening Manner and Microstructure Evolution of Al-In Hypermonotectic Alloy during Rapidly Cooling Process显示文摘A numerical model reflecting the real physical processes well has been developed to predict the coarsening manner of the second phase droplets and the microstructural evolution under the common action of nucleation, diffusional growth, colliding coagulation during rapid cooling Al-ln hypermonotectic alloys. The model reflects the real physical processes well and is also applicable to other immiscible alloys. | Yuan LIU, Jingjie GUO, Jun JIA, Yanqing SU, Hongsheng DING, Jiuzhou ZHAO and Xiang XUESchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China | 2002 | Journal of Materials Science & Technology2002，18，3： | 2 |
| 8 | Effect of Brownian Coagulation on the Liquid-liquid Decomposition in Gas-atomized Alloy Drops显示文摘建模并且模拟被执行了让 Al-Pb 合金在 theliquid 液体期间在把气体分裂成原子的落下在微观结构发展调查 Brownian 凝结效果分解。结果显示 Brownian 凝结在变粗上有一个弱效果在成核和相对强壮的效果少数阶段微滴。液体液体分解上的 Brownian 凝结的 Theinfluence 随直径的增加减少(或处于冷却的率的减少) 把分裂成原子的落下。 | Jiuzhou ZHAO Lingling GAO Jie HE L.Ratke | 2006 | Journal of Materials Science & Technology2006，22，3： | 2 |
| 9 | Microstructural Features and Mechanical Properties Induced by the Spray Forming and Cold Rolling of the Cu-13.5 wt pct Sn Alloy显示文摘Copper alloys with high strength and high conductivity are an important functional material with full of potential applications.In the present investigation,a bronze with higher tin content(Cu-13.5 wt pct Sn) was prepared successfully by spray forming,the feasibility of cold rolling this alloy was investigated,and the cold rolling characteristics of this alloy have also been discussed.The results indicate that the spray-formed Cu-13.5 wt pct Sn alloy,compared with the as-cast ingot,shows a quite fine and homogeneous single-phase structure,and,therefore shows an excellent workability.It can be cold-rolled with nearly 15% reduction in the thickness per pass and the total reduction can reach 80%.The classical border between the wrought and cast alloys is shifted to considerably higher tin contents by spray forming.After proper thermo-mechanical treatment,spray-formed Cu-13.5 wt pct Sn alloy exhibits excellent comprehensive mechanical properties. Particularly,it shows a low elastic modulus(~88 GPa)and a high flow stress(over 800 MPa)after cold forming.This combination of properties is unique in the domain of metallic materials and could open new possibilities in spring technology field. | Xiaofeng WANG Jiuzhou ZHAO Jie HE Jiangtao WANG | 2008 | Journal of Materials Science & Technology2008，24，5： | 2 |
| 10 | Unique sandwich design of high-efficiency heat-conducting phosphor-in-glass film for high-quality laser-driven white lighting显示文摘Multi-color phosphor-in-glass(PiG)film has been considered as a promising color converter in high-quality laser lighting owing to its outstanding merits of phosphor versatility,tunable luminescence,and simple preparation.However,the opto-thermal properties of PiG film are severely affected by the photon reabsorption and backward scattering of phosphor structure and the heat conduction of substrate.Herein,a unique sandwich design of phosphor structure was introduced in the multi-color PiG film for high-quality laser lighting.By elaborately synthesizing the borosilicate glass with low glass transition temperature(T_(g)),similar expansion coefficient,and high refractive index(RI),the sandwiched PiGs were prepared by sintering(~600℃)broadband green and red phosphor glass films on the double sides of sapphire.The green and red PiG films were tightly coated on the sapphire with no delamination and maintained higher luminescence intensity than raw phosphors at high temperatures.By simultaneously coupling photon reabsorption and backward scattering,the sandwiched green PiG film-sapphire-red PiG film(G-S-R PiG)yields a high-quality white light with a high luminous efficacy of 163 lm/W and an excellent color rendering index(CRI)of 85.4 under a laser power of 2.4 W,which are the best comprehensive results yet reported.Benefiting from the ingenious sandwich design with heat-conducting sapphire and thin PiG films,the G-S-R PiG displays low working temperatures(<200℃)under high-power laser excitation.This work reveals the role of sandwiched phosphor structure in photon loss and heat dissipation,which provides a new strategy to design PiG films for high-quality laser lighting. | Yang PENG Zikang YU Jiuzhou ZHAO Qing WANG Jiaxin LIU Bo SUN Yun MOU Mingxiang CHEN | 2022 | Journal of Advanced Ceramics2022，11，12： | 2 |
| 11 | Coarsening mode and microstructure evolution of Al–In hypermonotectic alloy during rapidly cooling process显示文摘 | Guo Jingjie Liu Yuan Jia Jun Su Yanqing Ding Hongsheng Zhao Jiuzhou Xue Xiang | 2001 | Scripta Materialia2001，，10： | 1 |
| 12 | Directional solidification of an Al–Pb alloy in a static magnetic field显示文摘 | Haili Li Jiuzhou Zhao | 2009 | Computational Materials Science2009，，4： | 1 |
| 13 | STRUCTURE CHARACTERISTICS OF MICROALLOYING AS-CAST MARTENSITIC CAST IRON显示文摘The microstructure and martensite substructure of as-cast martensitic high-Cr cast iron byinjection microalloying have been studied by usig SEM and TEM.The relationship betweendistribution of alloying elements and phase formation of carbide,as well as various branchingand distortion of carbide,have been analysed by X-ray diffractometer and EPMA. | ZHANG Jinghui LI Dajun ZHAO Jiuzhou JIA Jun Harbin Institute of Technology,Harbin,ChinaLI Jianhui Heilongjiang Association for Science and Technology,Harbin,China | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，9： | 1 |
| 14 | Behavior of Fe-rich phase during rapid solidification of Cu–Fe hypoperitectic alloy显示文摘 | Jie He Jiuzhou Zhao | 2005 | Materials Science & Engineering A2005，，1： | 1 |
| 15 | Metal recycling from waste memory modules efficiently and environmentally friendly by low-temperature alkali melts显示文摘Recycling of waste electrical and electronic equipment has become an urgent global issue in recent years from the prospectives of resources recycling and environmental protection.In the present work,the recycling of waste memory modules(WMMs)through low-temperature alkali melts was investigated,based on the thermodynamic analysis of the nonmetallic reactions of brominated epoxy resin,glass fiber and memory chip with the molten mixed alkali.The effects of the reaction temperature and the ratio of alkali mixture on the removal rate of nonmetallic parts in WMMs were discussed under the condition of air atmosphere.The optimum process parameters were further confirmed by in-situ monitoring of the temperature during the whole reaction process.The mixtures with Cu,Fe and Ni as the main components were obtained after the treatment of WMMs in the molten alkali.These mixed metals were further separated into copper-rich and ferronickel-rich metals by physical magnetic separation.Moreover,the precious metals Au and Ag were enriched in Cu-rich alloys.This work provided an efficient and environment-friendly method for metal recycling from WMMs. | ZHU MingWei MA HaoBo HE Jie CHEN Bin ZHANG LiLi JIANG HongXiang SUN XiaoJun ZHAO JiuZhou | 2020 | Science China(Technological Sciences)2020，63，11： | 1 |
| 16 | Effects of media and nutrient levels on seedling growth and flower of Cymbidium hybridum显示文摘 | Zhao Jiuzhou Zhou Chunling Guo Shaoxia | 2001 | Forestry Studies in China2001，9，3： | 1 |
| 17 | The effect of the interaction between the minority phase droplets on the nucleation behavior during the liquid-liquid phase transformation显示文摘The microstructure evolution during the liquid-liquid phase transformation of Al-Pb alloy was calculated. The numerical results indicate that the interaction between the minority phase droplets has effect on the nucleation process of the droplets, and the effect increases with the cooling rate and the content of Pb. | ZHAO JiuZhou LI HaiLi HE Jie | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，4： | 1 |
| 18 | Microstructure Formation in a Directionally Solidified Immiscible Alloy显示文摘 | Haili Li Jiuzhou Zhao Qinxia Zhang Jie He | 2008 | Metallurgical and Materials Transactions A2008，，13： | 1 |
| 19 | Efficient grain refinement of Al alloys induced by in-situ nanoparticles显示文摘Grain refinement of Al and Al alloys during the solidification remains a long-term challenge.Here we report a general strategy for efficient grain refinement through instantaneously in-situ forming abundant nanoparticles with concentrated size distribution.The Al-Zn-Mg-Cu alloy and commercial purity Al are respectively refined by using this proposed strategy and the traditional refinement method(adding AlTi-B alloy into Al melt),and the experimental and numerical results indicate that the TiBnanoparticles instantaneously form in the Al melt during the in-situ refinement process.Compared to the traditional refinement treatment method,the new approach not only can promote the high number density of the nucleation sites and narrow their size distribution,but also tremendously attenuates the agglomeration and settlement of the heterogeneous nucleation sites.It exhibits much better grain refinement ability and inhibits the decline of the grain refinement efficiency.This approach may have broad application prospect not only for the grain refinement of Al and Al alloys,but also for the grain refinement of other alloy systems,e.g.steel,magnesium,copper,and so on. | Hongxiang Jiang Yan Song Lili Zhang Jie He Shixin Li Jiuzhou Zhao | 2022 | Journal of Materials Science & Technology2022，，29： | 1 |
| 20 | Microstructure Formation in Al-Bi-Co Immiscible Alloys Directionally Solidified with Different Melt Superheat Temperatures显示文摘The directional solidification has been carried out for the Al-4Bi-2.5Co (wt pct) alloys with different melt superheat temperatures. The microstructure characterization and the quantitative metallographic analysis have been performed. The results indicated that the Bi-rich sphere size and cellular spacing decrease with increasing melt superheat temperature. The interaction between the advancing solidification interface and the Bi-rich spheres with different sizes was analyzed. The effect of the melt superheat treatment on microstructure evolution was discussed for the immiscible alloys. The microstructure development in ternary Al-Bi-Co alloys directionally solidified with different melt superheat temperatures was clarified. | Jie He , Chengyao Xing, Jiuzhou Zhao and Lei Zhao Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China | 2010 | Journal of Materials Science & Technology2010，26，2： | 1 |
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