表面形態の異なるSiCウィスカーを用いたSiCウィスカー/Al<sub>2</sub>O<sub>3</sub>複合材料の力学的性質

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タイトル別名
  • Mechanical Properties of SiC Whisker/Al<sub>2</sub>O<sub>3</sub> Composites Using Whiskers with Different Surface Roughness
  • ヒョウメン ケイタイ ノ コトナル SiC ウィスカー オ モチイタ SiC

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The surface roughness of SiC whiskers is changed by heat treatment in an inert gas atmosphere. Taking advantage of these phenomenon, SiC whisker/Al2O3 composites containing whiskers with different surface roughness were fabricated and their mechanical properties were evaluated. Composites using whiskers with smooth surface showed higher fracture toughness KIC and higher effective fracture energy γeff than those with rough surface It is suggested that smoothing of whiskers' surfaces leads to decrease in frictional force at whisker/matrix interfaces and that pullingout of whiskers which becomes easy to occur toughens the composites.

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