Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (01): 66-69.doi: 10.3866/PKU.WHXB20020115

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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

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