原位SiC颗粒增强MoSi_2基复合材料的显微组织和力学性能

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	原位SiC颗粒增强MoSi_2基复合材料的显微组织和力学性能
其他题名	Microstructure and mechanical properties of in situ SiC particulates reinforced MoSi2 matrix composite
	张来启; 孙祖庆; 张跃; 杨王玥; 陈光南
发表期刊	金属学报=Acta Metallurgia Sinica
	2001
卷号	37 期号:3 页码:325-331
ISSN	0412-1961
摘要	本文研究了原位SiC颗粒增强MoSi2基复合合材料的组织结构和力学性能。结果表明：复合材料的组织为t-MoSi2基体上均匀分布β-SiC等轴颗粒，数量很少的球形小孔隙主要分布在SiC颗粒内，SiC颗粒尺寸为2-5μm，复合材料界面为直接的原子结合，无非晶层存在。复合材料的室温维氏硬度，断裂韧性、抗压强度及高温流变应力明显高于单一MoSi2。随着SiC体积分数的增加，维氏硬度、断裂韧性及高温流变应力提高，而抗压强度先增加后减少，SiC体积分数从10%增加到45%，KIC从4.34提高到5.71MPa·m^1/2,与单一MoSi2相比提高了25%-46%；1400℃时，σ0.2从20%SiC的230提高到45%SiC的285MPa，比单一MoSi2提高了98%-146%。
其他摘要	Microstructure and mechanical properties of in situ SiC particulates reinforced MoSi2 matrix composite were investigated in this work. The results show that the microstructure of the composite consists of the beta -SiC equiaxed particulates with size of 2-5 mum, uniformly distributed in the MoSi2 matrix. A small amount of sphere pore is located within the SiC particulates. The MoSi2-SiC interface is atomically abrupt, free from amorphous phase (SiO2). The hardness, fracture toughness(K-IC), compressive strength at room temperature and flow stress at high temperature for the composite are significantly higher than those for the monolithic MoSi2. As volume percent of SiC increases, the hardness, toughness and flow stress increase, while the compressive strength at first increases and then decreases. As volume percent of SiC increases from 10 to 45, K-IC increases from 4.34 to 5.71 MPa .m(1/2), by a factor of 25%-46% than the monolithic MoSi2; At 1400 degreesC, sigma (0.2) increases from 230 to 285 MPa when SiC volume fraction increases from 20% to 45%, which corresponds to an increasing factor of 98%-146% than MoSi2.
学科领域	力学
收录类别	SCI ; EI ; CSCD
语种	中文
WOS记录号	WOS:000172766400022
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
CSCD记录号	CSCD:675803
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/15684
专题	力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	张来启,孙祖庆,张跃,等. 原位SiC颗粒增强MoSi_2基复合材料的显微组织和力学性能[J]. 金属学报=Acta Metallurgia Sinica,2001,37,3,:325-331.
APA	张来启,孙祖庆,张跃,杨王玥,&陈光南.(2001).原位SiC颗粒增强MoSi_2基复合材料的显微组织和力学性能.金属学报=Acta Metallurgia Sinica,37(3),325-331.
MLA	张来启,et al."原位SiC颗粒增强MoSi_2基复合材料的显微组织和力学性能".金属学报=Acta Metallurgia Sinica 37.3(2001):325-331.

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