Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Wear Behavior of Alumina-glass Composites Prepared by Melt Infiltration

용융침투법으로 제조한 알루미나-유리 복합체의 내마모 특성

  • Published : 2003.09.01
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Abstract

Wear and friction properties of the alumina-glass dental ceramics were evaluated in exact in vitro environment (artificial saliva at 37$^{\circ}C$), using a ball-on-disc apparatus, at contact loads from 49 N to 196 N and with the disc rotating at 120 rpm up to 10$^{6}$ cycles to investigate the wear behavior. As the load increased from 49 N to 196 N, the friction coefficient of 0.025 was maintained, however, the volumetric wear rate rose from 2.18 ${\times}$10$^{-9}$TEX>$mm^{3}$/Nㆍm to 2.35 ${\times}$10$^{-6}$TEX>$mm^{3}$/Nㆍm. Experimental results indicated that the wear behavior of the alumina-glass composites with a sliding distance of 4.4 km was a typical adhesive wear, which was applicable for orthodontia ceramic brackets.

인공치관용 알루미나-유리 복합체를 in vitro 분위기인 $37^{\circ}C$) 인공타액 하에서 49N~196N의 하중조건 하에서 ball-on-disc 형태로 120rpm의 회전속도로 직경 14mm인 트랙을 $10^{6}$) 횟수까지 내마모거동을 조사하기 위하여 내마모실험을 수행하였다. 하중이 49N,98N 196N으로 증가함에 따라, 마찰계수는 0.025로 일정하였지만 마모율은 2.18${\times}$$10^{-9}$$mm^{3}$/N.m, 3.37${\times}$$10^{-9}$$mm^{3}$/N.m, 2.35${\times}$$10^{-6}$$mm^{3}$/N.m로 증가하였다. 실험결과, 알루미나-유리 복합체의 마모거동은 마모길리 44km까지 전형적인 흡착마모로 치열교정용 세라믹 브라켓으로 적합하였다.

Keywords

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