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无机材料学报

无机材料学报

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反应熔渗法制备纳米 MoSi2-SiC复合材料

张小立1, 金志浩2, 冯耀荣3, 赵文轸2, 吕振林4, 霍春勇3
   

  1. 1. 中原工学院材料与化学工程系, 郑州 450007; 2. 西安交通大学材料科学与工程学院, 西安 710049; 3. 中国石油天然气集团公司管材研究所, 西安 710065; 4. 西安理工大学材料科学与工程学院, 西安 710048


  • 收稿日期:2006-08-17 修回日期:2006-10-10 出版日期:2007-07-20 网络出版日期:2007-07-20

Preparation and Microstructure of Nano MoSi2-SiC Composite by Melt Infiltration Process

ZHANG Xiao-Li1, JIN Zhi-Hao2, FENG Yao-Rong3, ZHAO Wen-Zhen2, Lü Zhen-Lin4, HUO Chun-Yong3   

  1. 1. Department of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China; 2. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China; 3. CNPC Research Institute of Tubular Goods, Xi'an 710065, China; 4. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
  • Received:2006-08-17 Revised:2006-10-10 Published:2007-07-20 Online:2007-07-20

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摘要： 运用Mo+C坯体反应溶渗法, 可以得到MoSi2-SiC复合材料, 其基体相晶粒尺寸为150～600nm, 反应生成的SiC相分布均匀, 大小为30～160nm之间. 该纳米MoSi2-SiC复合材料强度为214.8MPa, 断裂韧性为4.1MPa·m1/2, 力学性能远高于单相材料. 透射电镜研究表明, 在复合材料中存在大量的层错和一些位错, 也有孪晶存在.

关键词: MoSi2-SiC, 纳米复合材料, 力学性能, 反应熔渗法

Abstract: MoSi2-SiC composite was successfully prepared by Si melt infiltration into Mo+C preforms. The crystal grain size of the resultant matrix is 150-600nm, and the size of SiC phase produced is 30-160nm which disperses homogeneously in the matrix. The strength of the composite is 214.8MPa, the toughness is 4.1MPa·m1/2, these mechanical properties are higher than that of single phase MoSi2. TEM results show lots of stacking faults, some dislocations, and twins existing in the composite.

Key words: MoSi2-SiC, nano-composite, mechanical property, melt infiltration

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