SiC颗粒强韧化MoSi<sub>2</sub>复合材料

刘伯威; 潘进; 樊毅; 张金生

SiC颗粒强韧化MoSi₂复合材料

1.
中南大学粉末冶金国家重点实验室,长沙410083;
2.
广岛大学工学部机械系,日本广岛1-4-1739-8527

详细信息

作者简介:
刘伯威(1965),男,硕士,副研究员,主要从事金属和陶瓷基复合材料、摩擦材料、B₄C气浮轴承材料的研究。

中图分类号: TQ174.758.22
计量
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- 被引次数: 0
出版历程
- 收稿日期: 2000-05-26
- 修回日期: 2000-10-23
- 刊出日期: 2002-02-15

SiC PARTICLE REINFORCED MoSi₂ COMPOSITES

1.
State Key Laboratory for Powder Metallurgy, Centre South University, Changsha410083,China;
2.
Department of Materials Engineering, Hiroshima University, Kagamiyama 1-4-1, Higash-Hiroshima, 739-8527, Japan

摘要

摘要: 通过湿法混料和热压烧结工艺成功地制备了20vo1%SiC_P/MoSi₂复合材料,并测定了其显微组织和力学性能。结果表明:SiC_P/MoSi₂复合材料主要由MoSi₂和SiC颗粒组成,还有少量的Mo₅Si₃,致密度为92.3% 。与MoSi₂相比,其室温抗弯强度提高了30.6%,断裂韧性提高了53%,1200℃的抗压强度提高了44%,1400℃的抗压强度提高了53%;其硬度、弹性模量等性能有较大提高。在Al₂O₃和SiC对磨盘上表现出极其优异的耐磨性能。SiC颗粒对MoSi₂的室温增韧、高温增强效果显著。
- 二硅化钼 /
- 复合材料 /
- SiC颗粒 /
- 力学性能
Abstract: SiC particle reinforced molybdenum disilicide(MoSi₂) matrix composite has been fabricated by wet mixing and hot press sintering successfully.The microstructure and mechanical properties of the composite were determined. The experimental results showed that SiC_P/MoSi₂ composite has a phase constituent with about 20 vol% SiC and less Mo₅Si₃ in MoSi₂ matrix.Compared with unreinforced MoSi₂, the flexural strength of SiC_P/MoSi₂ composite is increased by 33% and the fracture toughness by 52% at room temperature. Compressive yield strength of SiC_P/MoSi₂ composite is increased by 44% at 1200℃ and by 53% at 1400℃. SiC_P/MoSi₂ composite has been improved in its hardness and elastic modulus.The wear resistance of SiC_P/MoSi₂ on Al₂O₃ and SiC grind wheel is very excellent. An additional SiC particle into MoSi2 matrix has reflected improvements in toughness at room temperature and strength at high temperature.
- molybdenum-disilicide /
- silicon carbide /
- hot press /
- mechanical properties