Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)

Korean Society of Ocean Engineers (한국해양공학회)
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Fabrication and Impact Properties of $Nb/MoSi_2-ZrO_2$ Laminate Composites

$Nb/MoSi_2-ZrO_2$ 적층복합재료의 제조 및 충격특성

  • Lee, Sang-Pill (Development of Mechanical engineering, Dong-Eui University) ;
  • Yoon, Han-Ki (Development of Mechanical engineering, Dong-Eui University) ;
  • Kong, Yoo-Sik (Center for Industrial Technology, Dong-Eui University)
  • 이상필 (동의대학교 기계공학과) ;
  • 윤한기 (동의대학교 기계공학과) ;
  • 공유식 (동의대학교 산업기술개발연구소)
  • Published : 2002.05.17
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Abstract

[ $Nb/MoSi_2-ZrO_2$ ] laminate composites have been successfully fabricated by alternately stacking $MoSi_2-ZrO_2$ powder layer and Nb sheet, followed by hot pressing in a graphite mould. The fabricating parameters were selected as hot press temperatures. The instrumented Charpy impact test was carried out at the room temperature in order to investigate the relationship between impact properties and fabricating temperatures. The interfacial shear strength between $MoSi_2-ZrO_2$ and Nb, which is associated with the fabricating temperature and the growth of interfacial reaction layer, is also discussed. The plastic deformation of Nb sheet and the interfacial delamination were macroscopically observed. The $Nb/MoSi_2-ZrO_2$ laminate composites had the maximum impact value when fabricated at 1623K, accompanying the increase of fracture displacement and crack propagation energy. The interfacial shear strength of $Nb/MoSi_2-ZrO_2$ laminate composites increased with the growth of interfacial reaction layer, which resulted from the increase of fabricating temperature. there is an appropriate interfacial shear strength for the enhancement of impact value of $Nb/MoSi_2-ZrO_2$ laminate composites. A large increase of interfacial shear strength restrains the plastic deformation of Nb sheet.

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