物理化学学报 >> 2002, Vol. 18 >> Issue (01): 66-69.doi: 10.3866/PKU.WHXB20020115

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原位反应合成Mo-Si化合物系复合材料

朱景川;来忠红;王丽艳;李明伟;尹钟大   

  1. 哈尔滨工业大学材料科学与工程学院，哈尔滨　150001
  • 收稿日期:2001-06-16 修回日期:2001-08-28 发布日期:2002-01-15
  • 通讯作者: 朱景川 E-mail:zhujc@263.net

Mo-Si Compound Composites Synthesized by In Situ Reaction

Zhu Jing-Chuan;Lai Zhong-Hong;Wang Li-Yan;Li Ming-Wei;Yin Zhong-Da   

  1. School of Materials Science and Engineering, Harbin University of Technology, Harbin　150001
  • Received:2001-06-16 Revised:2001-08-28 Published:2002-01-15
  • Contact: Zhu Jing-Chuan E-mail:zhujc@263.net

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摘要： 采用反应烧结法原位合成了MoSi系化合物复合材料，利用X射线衍射仪、扫描电镜和电子探针等考察了材料的显微结构和相组成.结果表明，随原料粉中Mo含量的增加， MoSi系反应生成物依次向MoSi2→Mo5Si3→Mo3Si变化；各相分布较为均匀，组织致密，晶粒细小.

关键词: Mo-Si系化合物, 反应烧结, 显微组织

Abstract: MoSi compound composites were synthesized by in situ reaction hot pressing. Their microstructure and phase composition were analyzed by means of scanning electron microscope(SEM), electron probe microanalyzer(EPMA) and Xray diffractometer(XRD). The results indicate that the reaction products in MoSi system vary according to the order MoSi2→Mo5Si3→Mo3Si with increasing content of Mo in mixed powders. The sintered materials are nearly fully densified except the Mo3SiMo composite,exhibiting fine and homogeneous microstructures. Both MoSi2Si and MoSi2Mo5Si3 materials have an equivalent volume fraction and display an“infiltrationflow structure”. In Mo3SiMo composite, the excess Mo phase exists in “islandstructure”.

Key words: Mo-Si compounds, Reaction sintering, Microstructure