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Electronic Structure of the Clusters Containing Oxygen in Ni

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Journal of materials Science & Technology 1996年第6期12卷 427-433页

作者： Tao YU Chongyu WANG and Bing WANG (Central Iron and Steel Research Institute, Beijing 100081, china)(To whom correspondence should be addressed)( The international Centre for {2. {3. of the chinese Academy of sciences, shenyang 110015, china) Central Iron and Steel Research Institute Beijing 100081 China international Centre for materials {2. Chinese Academy of Sciences Shenyang 110015 China

The electronic structure of the clusters containing oxygen, the stacking fault and the complex in the transition metal Ni are calculated by the multiple-scattering Xa method. Energy levels,density of states and transfer of charge are obtained. Based on the calculation and analysis,the influences of impurity oxygen and structure defect on the electronic structure of the clusters are discussed, and it is found that the local Ni-o cluster with the interstitial oxygen is a stable atomic configuration.

关键词： Rev Electronic Structure of the Clusters Containing Oxygen in Ni Wang

Microstructure characterization of high-energy product Nd-Fe-B thin film

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Progress in Natural Science:materials international 2010年第1期20卷 76-80页

作者： Fang XU~1,Fang YANG~2.Xian-ping DONG~1,Lan-ting ZHANG~1,Wei LIU~2.Zhi-dong ZHANG~2.1.School of {3. Science and Engineering,Shanghai Jiao Tong University,Shanghai 2.02.0,china 2.{2. National Laboratory for {3. Science,Institute of Metal Research and international Centre for {3. physics,{13. Academy of sciences,{2. 110016,china School of materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China shenyang National Laboratory for materials Science Institute of Metal Research and International Centre for Materials Physics Chinese Academy of Sciences Shenyang 110016 China

A Si/Mo（50 nm）/Nd-Fe-B（400 nm）/Mo（50 nm）film with relatively high-energy product（BH）max=2.7 kJ/m3.was prepared on a Si substrate heated at 650℃.The microstructure of the film was investigated by X-ray diffractometry（XRD）and high-resolution transmission electron microscopy（HRTEM）.The Nd-Fe-B thin film shows a notable out-of-plane c-axis *** （110）orientated Mo grains is proved to promote the growth of c-axis oriented texture of the Nd2.e14B grains,which is favorable to achieve a high ***-scale spherical Nd-O phases composed of randomly orientated polycrystalline grains and a sharp grain boundary without grain boundary phase between two Nd2.e14B grains are *** coercivity highly depends on a certain amount of Nd-O phase and interface morphology.

关键词： Nd-Fe-B thin films microstructure Nd-O phase magnetic properties

Effect of pressure on thermostability of Fe_3.

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chinese Science Bulletin 1997年第21期42卷 1796-1798页

作者： YAO Bin, LIN Xiaomin, LI Fushan, SU Wenhui, DING Bingzhe and HU Zhuangqi1. Department of physics, Jilin University, Changchun 13.02., china 2. State Key Laboratory of Rapidly Solidified Non-equilibrium Alloys, Institute of Metal Research, {2. Academy of sciences, shenyang 110015, china Department of physics Jilin University Changchun China State Key Laboratory of Rapidly Solidified Non-equilibrium Alloys Institute of Metal Research Chinese Academy of Sciences Shenyang China

EFFECT of pressure on thermostability of metastable materials has been one of the importantsubjects in high-pressure research field. In the past ten odd years, much work has been donefor amorphous materials but a little for metastable crystalline materials, which indicates thatthe effect of pressure on the amorphous materials is closely related to their properties and crys-tallization mode, and is determined by two opposite influences of pressure on diffusion andnucleation, which make the thermostability of amorphous materials either increase or de-

关键词： pressure phase transition thermostability.

Calculation of the Surface Segregation of Cu-0.3.at. pct Au Alloy

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Journal of materials Science & Technology 2000年第6期16卷 639-640页

作者： Liping ZHENG and Risheng LI (international Center for Material physics, {2. Academy of {3., shenyang 110015, china) Yuanxun ZHANG and Shi QIU (Shanghai Institute of Nuclear Research, {2. Academy of {3., Shanghai 2.1800, china) Bingyao JI Int. Cent. for Material Phys. Chinese Acad. of Sci. Shenyang 110015 China

Monte Carlo simulation technique with the energetics described by the embedded atom method has been used to calculate the surface segregation of Cu-0.3.at. pct Au alloy at T=800 K. It is found that the component Au in... 详细信息

关键词： Cu Calculation of the Surface Segregation of Cu-0.3.at pct Au Alloy

Effect of cyclic recovery heat treatment on surface recrystallization of a directionally solidified superalloy

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Progress in Natural Science:materials international 2011年第6期21卷 491-495页

作者： Guang XIE~1,Jian ZHANG~(1,2.,Lang-hong LOU~1 1.Superalloys Division,Institute of Metal Research,chinese Academy of sciences,{2. 110016,china 2.{2. National Laboratory for materials Science,Institute of Metal Research, chinese Academy of sciences,{2. 110016,china Superalloys Division Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China shenyang National Laboratory for materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Microstructural evolution and micro-hardness of a directionally solidified Ni-base superalloy subjected to shot-peening during cyclic recovery heat treatment was *** was found thatγ' dissolved and dislocation annihilation occurred during heating, while y' re-precipitated when temperature *** to the formation of a stable dislocation network at ylf interface,full recovery and therefore complete elimination of the surface recrystallization are difficult by the present cyclic recovery heat treatment.

关键词： recrystallization superalloy dislocation recovery heat treatment

Energy Spectra of the Tunable Laser Crystal Gd3.asO12.Cr3. and Their Pressure-Induced Shifts

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Communications in Theoretical physics 2004年第1期 141-150页

作者： MA Dong-Ping~(1,2. 1 Department of Applied physics,Sichuan University,Chengdu 610065,china 2.{2. Centre for materials physics,Academia Sinica,shenyang 110015,china

By means of both the theory for pressure-induced shifts（PS）of energy spectra and the theory for shiftsof energy spectra due to electron-phonon interaction（EPI）,at 3.0K,the‘pure electronic’contributions and the contri-butions from EPI to R1line,R2.ine,and U band of GGG:Cr3.as well as their PS have been calculated,*** total calculated results are in good agreement with all the experimental *** physical origins have *** is found that the mixing-degree of|t（2.2.(3.1)e4T2.and|t2.2.〉base-wavefunctions in the wavefunctions ofR1level of GGG:Cr3.is considerable under normal pressure,and the mixing-degree rapidly decreases with *** change of the mixing-degree with pressure plays a key role for PS of R1line or *** 3.0K,boththe temperature-independent contribution to R1line（or R2.ine or U band）from EPI and the temperature-dependentone are *** remarkable difference between pressure-dependent behaviors of PS of R1lines of GGG:Cr3.andGSGG:Cr3.results from the differences of their microscopic *** features of emission spectra of GGG:Cr3.at various pressures have satisfactorily been explained.

关键词： high-pressure effect line shift spin-orbit interaction electron-phonon interaction d-orbital coupling between t2.(3.1)e4T2.and t2. 2. tunable laser crystal

Temperature Dependent Work-hardening Behaviour in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy

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Journal of materials Science & Technology 1995年第4期11卷 304-306页

作者： Lijian RONG Yiyi LI and Changxu SHI (Institute of Metal Research, chinese Academy of sciences, {2., {3., china) Inst of Metal Research Chinese Acad of Sciences Shenyang China

The work-hardening behaviour in an Fe-Mn-Si-Cr-Ni alloy has been investigated using tensile test at different temperatures and TEM observation. It was found that besides the intersection of εmartensite, the intersections of ε martensite with stacking fault and the cross-slip of dislocation which is difficult to occur in the alloy with low stacking fault energy are also important factors to the temperature dependent work-hardening behaviour.

关键词： Work Mn Fe Temperature Dependent Work-hardening Behaviour in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy Cr Si Ni

Surface Modification of Ceramic materials Using Excimer Laser

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Journal of materials Science & Technology 2000年第4期16卷 401-404页

作者： Yingna WU, Zhongchao FENG and Jing LIANG (Institute of Metal Research, chinese Academy of sciences,{2.,{3.) Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

Changes of surface morphology following XeCI excimer laser irradiation were investigated for three engineering ceramic materials (Al2.3. Al2.3.SiC nanocomposite and Si3.4). Al2.3.and AI2.3.SiC nanocomposite samples exhibit a smooth rapid melt layer on the surface, and the formation of the metastabfe γ-Al2.a was observed. A silicon-rich layer on the surface was formed after laser irradiation of Si3.4. The toughness K1c of the materials was measured by the indentation fracture method. After laser irradiation, the toughness of Al2.3. Al2.3.SiC nanocomposite and Si3.4 was improved to various degrees: Al2.3.SiC nanocomposite, 60% (max.); AI2.3. 40% (max.); Si3.4, 12. (max.).

关键词： Surface Modification of Ceramic materials Using Excimer Laser SiC

ANALYSIS OF THE GROWTH MECHANISM OF TiAl_3.WHISKERS PREPARED BY IN SITU REACTION IN MOLTEN ALUMINUM

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Acta Metallurgica Sinica(English Letters) 1997年第5期10卷 403-408页

作者： B. Yang YQ. Wang J. Zhang and B.L. Zhou （Institute of Metal Research, chinese Academy of Sciellces, shenyang 110015,{2. Nanchang University, Nanchang 3.002.,{2. international Center for materials physics, chinese Academy of sciences, shenyang Inst of Metal Research Chinese Acad of Sciences Shenyang China

Some TiAl3.whiskers are found to be produced simultaneously during the formation process of TiB2.Particulates fabricated by in situ reaction in molten aluminum. The thec t of temperature of molten aluminum on the morphologies of the TiAl3.whiskers and the growth mechanism of the whiskers are studied in this paper. The results show that the aspect rutio of the TiAl3.whiskers decreases with the increase of the temperoture. The growth of the whiskers is proved to be controlled by a Vapor-LiquidSoltd (VLS) mechanism. The titanium and aluminum atoms in the catalytic droplet,however, have been coofrmed to react with each othen which is dtherent from other whlskcrs growing by a VLS mcchanism where the compostion in the catalytic droplet is a constant.

关键词： in situ reaction TiAl_3.whisker morphology growth mechanism