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mechanisms were systematically studied. Results show that the alloys with La addition are composed of BCC solid solution, eutectic structure, MSi2 disilicide phase and La-containing precipitates. Eutectic structure and most of La precipitates are formed at the grain boundaries. Disilicide phase is formed in the grains. La can change the grain morphologies from dendritic structure to near-equiaxed......
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MOSi2材料的强韧化研究进展 吴壮志1,徐兵1,王德志1 (1.中南大学材料科学与工程学院,长沙,410083) 摘要:综述了近年来MoSi2材料的强韧化研究进展,主要包括复合化Si3 N4,ZrO2,SiC,TiC,La2O3,多种增强体和合金元素Al,Re,Nb对MoSi2性能的影响及强韧化机理,并展望了MoSi2材料的强韧化发展趋势. 关键词:MoSi2; 强韧化; 复合化; 合金化; molybdenum disilicide; strengthening and toughening; compounding; alloying; [全文内容正在添加中] ......
with parabolic law. Key words: molybdenum disilicide; alloying; mechanical properties; oxidation behavior  ......
primarily by a heterogeneity of bond distribution. Key words: molybdenum disilicide; valence electron; cohesive energy; brittleness 金属间化合物MoSi2以其高熔点(2 030 ℃),较低密度(6.24 g/cm3),优异的高温抗氧化性和耐蚀性,良好的导电导热性而成为新型高......
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Si-Al COATING ON PURE MOLYBDENUM SUBSTRATE AND ITS CYCLIC OXIDATION BEHAVIOR H.B.Xu1,S.K.Gong1,F.S.Liu1,C.G.Zhou1,J.L.Xu1 (1.School of Materials Science and Engineering, Beijing University... on the microstructure and elevated-temperature oxidation resistance of coatings. The results show that hexagonal Mo (Si, Al)2 as a main phase and a little amount of the lower disilicide MosSis was formed on Mo......