이규화몰리.텅스텐 복합재료의 합성에 관한 연구

A Study on Synthesis of (Mo.W)$\textrm{Si}_2$ Composites

  • 장대규 (한국자원연구소 활용연구부) ;
  • Jang, Dae-Gyu (Minerals Utilization Division, Korea Institute of Geology, Mining & Materials) ;
  • Abbaschian, R. (Dept. of Materials Science and Engineering, University of Florida)
  • 발행 : 1999.01.01

초록

(Mo.W)Si$_2$ composites were fabricated by vacuum hot-pressing elemental Mo, W and Si powders at various temperatures. Elemental Mo, W and Si powders were alloyed in the proper proportions to form solid solutions. The microstructure and properties of these materials was characterized by using x-ray diffraction, optical microscopy, energy dispersive x-ray spectroscopy and Vicker's technique. It was found that tungsten was mainly substituted for Mo atoms, and made a completed solid solution of (Mo.W)Si$_2$ over 1$600^{\circ}C$. The lattice parameters and Vickers hardness increased largely with increasing reaction temperature by the most soluble elements, due to the solid-solution hardening.

키워드

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