反应熔渗法制备纳米 MoSi<SUB>2</SUB>-SiC复合材料

无机材料学报, 2007, 22(4): 690-694. doi: 2007 DOI:10.3724/SP.J.1077.2007.00690

反应熔渗法制备纳米 MoSi₂-SiC复合材料

张小立 , 金志浩 , 冯耀荣 , 赵文轸 , 吕振林 , 霍春勇

3. 3. 中国石油天然气集团公司管材研究所, 西安 710065

4. 4. 西安理工大学材料科学与工程学院, 西安 710048

1.1. Department of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China

3. 3. CNPC Research Institute of Tubular Goods, Xi'an 710065, China

4. 4. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China

关键词： MoSi2-SiC , nano-composite , mechanical property , melt infiltration

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

ZHANG Xiao-Li , JIN Zhi-Hao , FENG Yao-Rong , ZHAO Wen-Zhen , Lü Zhen-Lin , HUO Chun-Yong

Keywords： MoSi2-SiC , 纳米复合材料 , 力学性能 , 反应熔渗法

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·m^1/2, 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.

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·m^1/2, 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.

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反应熔渗法制备纳米 MoSi2-SiC复合材料

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

参考文献

反应熔渗法制备纳米 MoSi₂-SiC复合材料

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