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J. Cent. South Univ. Technol. (2008) 15: 301-304 DOI: 10.1007/s11771-008-0056-1 Effect of relative density on cyclic oxidation resistance properties of MoSi2 YAN Jian-hui(颜建辉)1, 2, LI Yi-min(李益... h) nearly obey linear kinetics, but the oxidation rates are obviously different. The oxidation kinetics of MoSi2 with higher relative density nearly follows parabolic law. The mass gains of MoSi2......
Cyclic Oxidation Behaviors of MoSi2 with Different Relative Density颜建辉摘 要:The influence of different relative density on the cyclic oxidation behaviors... of MoSi2 with the lowest relative density (78.6%) and the highest relative density (94.8%) are in-creased by 8.15 mg·cm-2 and 3.48 mg·cm-2, respectively. The surface of the material with lower rela-tive......
INVESTIGATION ON THE DENSITY UNIFORMITY OF PRESSED PARTS BY LOW-VOLTAGE ELECTROMAGNETIC COMPACTION Z.H.Meng1,Y.C.Li1,S.Y.Huang2,B.Zhang1,W.Ouyang1 (1.Wuhan University of Technology, Wuhan 430070... and special materials working under limited conditions. Research and development of new efficient technology to form high-density,high-performance and net shape parts is a key to widen application......
and the water vapor density was investigated. The results show that the expressions of the environmental and concrete humidity expressed by the relative humidity and water vapor density are significantly different. The relative humidity of the natural environment periodically changes with time, however the water vapor density value is constant. On the contrary, the response spectrum of the concrete......
Effect of sintering on the relative density of Cr-coated diamond/Cu composites prepared by spark plasma sinteringWei Cui1,Hui Xu1,Jian-hao Chen1,Shu-bin Ren1,Xin-bo He1,Xuan-hui Qu1,21. Institute... particle size on the relative density and thermal conductivity of the composites were investigated in this paper. The influence of these parameters on the properties and microstructures of the composites......
Change in relative density of WC-Co cemented carbides in spark plasma sintering processSUN Lana,b,LIN Chenguangc,JIA Chengchanga,JIA Xiana,and XIAN Mina a School of Materials Science and Engineering... Department,General Research Institute for Nonferrous Metals,Beijing 100088,China摘 要:The relative density of WC-Co cemented carbides during spark plasma......
was an important factor resulting in the inhomogeneous relative density and reverse-density distribution phenomena in the regions near the die wall and the symmetrical axis.
Key words: powder metal; warm compaction; finite element method; friction; relative density
Density functional theory study on hydrogenation mechanism in catalyst-activated Mg(0001) surface
WU Guang-xin(吴广新)1, LIU Su-xia(刘素霞)1, ZHANG Jie-yu(张捷宇)1,
WU Yong-quan(吴永全)1, LI Qian(李 谦... of Fe3O4 catalyst is known to substantially improve the adsorption and desorption thermodynamics and kinetics of Mg-based materials. Using density functional theory in combination with nudged elastic......Density functional theory study on hydrogenation mechanism in catalyst-activated Mg(0001) surface
来源: 《中国有色金属学报(英文版)2009年第2期》——吴广新 刘素霞 张捷宇 吴永全 李谦 周国治 包新华
simulated. Two different compaction schemes with different punch displacements were tested and the relative density distribution was obtained. Comparison with experimental data shows that the homogeneity... force with changing relative density, as well as the thermal effect due to plastic deformation or friction[1-7]. In the past three decades, different kinds of Elliptical Cap yield models based on von......
for sintering billets, the process of powder compacting followed by vacuum hot pressed sintering and hot extrusion was put forward to densitify the composite powders. To provide higher relative density and high quality billets for subsequent sintering, the relation curves of pressed compacts prepared by high-energy mechanical milling 3%C-Cu (mass fraction) powders about relative density vs compacting......