通过显微组织观察和力学性能测试,对亚微米Si3N4颗粒强韧化MoSi2的效果及其作用机制进行了初步研究和探讨.结果表明:复合材料中的Si3N4颗粒在基体的间层作用,可抑制MoSi2晶粒长大;断口呈现晶粒细小、裂纹扩展曲折和沿晶与穿晶混合型断裂等特征;Si3N4颗粒通过弥散强化和细化晶粒使复合材料强度提高,室温断裂韧度达到8.2 MPa·m1/2,通过晶粒细化、裂纹偏转和分支、微裂纹形成等机制的综合作用使复合材料增韧.
所属栏目
中国博士后基金资助项目(20060400261)
收稿日期
2007/5/82007/9/15
作者单位
周宏明:中南大学 材料科学与工程学院, 湖南 长沙 410083中南大学 粉末冶金国家重点实验室, 湖南 长沙 410083
易丹青:中南大学 材料科学与工程学院, 湖南 长沙 410083
备注
周宏明(1974-),男,湖南茶陵人,副教授,博士后.
引用该论文:
ZHOU Hong-ming,YI Dan-qing.Toughening Effect and Mechanism of Thermo-compressed Composite Si3N4/MoSi2[J].Materials for mechancial engineering,2008,32(3):23～25
周宏明,易丹青.热压Si3N4/MoSi2复合材料的强韧化效果与机制[J].机械工程材料,2008,32(3):23～25
被引情况:
【1】
周宏明,柳公器,肖来荣,易丹青, "Si
3N
4p-SiC
w/MoSi
2复合材料的强韧化效果与机制",机械工程材料
33, 46-49(2009)
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