Effects of Mo Addition on the Microstructures and Mechanical Properties of $Al_2O_3$ Ceramics

Mo첨가가 $Al_2O_3$ 세라믹스의 미세구조 및 기계적 성질에 미치는 영향

  • 박정현 (연세대학교 요업공학과) ;
  • 문성환 (연세대학교 요업공학과) ;
  • 백승수 (연세대학교 요업공학과) ;
  • 정동익 (연세대학교 요업공학과)
  • Published : 1988.03.01


To investigate the effects of Mo addition on the microstructures and mechanical properties of Al_2O_3$ ceramics, two kinds of Mo particles with average sizes of 2-${\mu}{\textrm}{m}$ and 6-${\mu}{\textrm}{m}$ were used as additives. It was shown that Mo particles inhibited the grain growth of Al_2O_3$, and the smaller Mo particles were more effective. In case of 2-${\mu}{\textrm}{m}$ Mo dispersion, the bending strength and the fracture toughness were increased. Dispersion of 6-${\mu}{\textrm}{m}$ MO did not increase the strength but improved the fracture toughness a little. The toughening mechanisms of Al_2O_3$-Mo composites are thought to be the crack deflection and microcracking mechanisms.



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