共搜索到8474条信息，每页显示10条信息，共848页。用时：0小时0分0秒354毫秒
原位合成Mo-Si-B三元系多相合金的热力学评估 张来启1,高升1,陈国良1,林均品1 (1.北京科技大学新金属材料国家重点实验室,北京,100083) 摘要:对Mo-Si-B三元系中各化合物不同温度下的标准生成自由焓和不同开始温度下合成Mo-Si-B三元系多相合金反应的绝热温度以及生成物的熔化比进行了计算和分析评估.结果表明,在元素配比合适的情况下,原位合成热力学稳定的α-Mo+Mo3Si+Mo5SiB2(T2)和Mo3Si+Mo5Si,(T1)+T2多相合金是完全可行的,合成反应的绝热温度以及生成物的熔化比与开始温度有关,原位合成这些多相合金不宜采用燃烧合成的SHS(自蔓延高温合成)模式,适合采用燃烧合成的热爆模式. 关键词:Mo-Si-B三元系; 原位合成; 多相合金; 热力学; 绝热温度; Mo-Si-B ternary system; in-situ synthesis......
Ho_2O_3的引入量为6%时,材料的抗弯强度达到最大值,约为593.5MPa;断裂韧度达到最大值,为8.74MPa·m~(1/2),具有可接受的力学性能. 关键词:Ho掺杂; 原位反应; Al_2O_3-Ho_2O_3/TiAl复合材料; 微观形貌; 力学性能; doping Ho; in-situ reaction synthesis; Al_2O_3-Ho_2O_3/TiAl composite......
来解释.TiB2/AC8A复合材料的蠕变断裂行为符合Monkman-Grant关系式. 关键词:金属基复合材料; 亚微米颗粒; 原位制备; 蠕变; metal matrix composites (MMCs); sub-micron particulate; in-situ synthesis; creep; [全文内容正在添加中] ......
In-situ weld-alloying plasma arc welding of SiCp/Al MMC LEI Yu-cheng(雷玉成), YUAN Wei-jin(袁为进), CHEN Xi-zhang(陈希章), ZHU Fei(朱 飞), CHENG Xiao-nong(程晓农) School of Materials Science and Engineering...) by in-situ weld-alloying/plasma arc welding with titanium as the alloying element. The wetting property between reinforced phase and Al matrix is improved, a stable weld puddle is gotten and a novel composite......
In-Situ Wet Chemical Composition of Multicomponent Precursors to Blue Emitting Sr2CeO4 Phosphors Xiao Xiuzhen1,Yan Bing1 (1.Department of Chemistry, Tongji University, Shanghai 200092, China) Abstract:Hybrid precursors were assembled with cerium coordination polymers, polyethyl glycohol (PEG), SrCO3 and other functional components using a modified in-situ chemical polymeric gel technology......
. 关键词:搅拌摩擦加工; 原位反应; Al合金; friction stir processing; in-situ synthesis; Al alloy; [全文内容正在添加中] ......
Synthesis and grain growth kinetics of in-situ FeAl matrix nanocomposites (Ⅱ): Structural evolution and grain growth kinetics of mechanically alloyed Fe-Al-Ti-B composite powder during heat... discussed. The results show that the nanocrystalline FeAl and in-situ TiB2/FeAl nanocomposite powders can be synthesized by subsequent heat treatment. Besides the relaxation of crystal defects......
......
technology combinations [7-12]. Among all the synthesis technologies of the composite, the in-situ melt reaction technology is one of the most promising methods. The ceramic-reinforced aluminum-silicon matrix composites by in-situ melt reaction synthesis show special merits as follows: 1) the thermodynamics stability of the in-situ reinforced particles is better than that of the ex-situ......
of FexCo4-xSb12 (x=0-1.0) were prepared by in-situ spark plasma sintering(SPS) at temperature range from 300 to 600 ℃ with Co, Sb, Fe powders as raw materials. The synthesis condition, structures...; 文献标识码:A Electrical properties of Fe substituted CoSb3 based thermoelectric compounds synthesized by in-situ SPS ZHANG Xin, ZHANG Jiu-xing, LU Qing-mei, LIU Yan-qin (The Key Laboratory......
