한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제23권6호
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  • Pages.93-98
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  • 2009
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  • 1225-0767(pISSN)
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  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지

$MoSi_2$ 복합재료의 특성

Properties of $MoSi_2$ Based Composite Materials

  • Lee, Sang-Pill (Department of Mechanical Engineering, Dong-Eui University) ;
  • Cho, Kyung-Seo (Department of Mechanical Engineering, Dong-Eui University) ;
  • Lee, Jin-Kyung (Department of Mechanical Engineering, Dong-Eui University) ;
  • Bae, Dong-Su (Department of Materials Science & Engineering, Dong-Eui University)
  • 발행 : 2009.12.31
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초록

The mechanical properties of $MoSi_2$ based composites containing various types of reinforcement, such as SiC, $ZrO_2$, and W, were investigated, based on detailed examinations of their microstructures. $MoSi_2$ based composites were fabricated at a temperature of $1350^{\circ}C$ using a hot-press device. The volume fraction of SiC and $ZrO_2$ particles in this composite system was fixed as 20%. The volume fraction of three types of W particles was changed from 10% to 30%. The characteristics of the $MoSi_2$ based composites were determined by means of optical microscopy and a three-point bending test. The addition of W particles to the $MoSi_2$ powders exhibited a sufficient improvement in the microstructure and mechanical property of the sintered $MoSi_2$ materials, compared to those of SiC and $ZrO_2$ particles. In particular, W/$MoSi_2$ composites containing W particles of 20 vol% represented a good flexural strength of about 530MPa at room temperature, accompanying a relative density of about 92%. The flexural strength of the W/$MoSi_2$ composites tended to decrease with an increase in the average size of the W particles.

키워드

참고문헌

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