Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Effect of Surface Grinding on Low Temperature Degradation of 3Y-TZP

표면 연마가 3Y-TZP의 저온열화에 미치는 영향

  • 김대준 (한국과학기술연구원 재료연구단) ;
  • 이홍림 (연세대학교 세라믹공학과) ;
  • 정형진 (한국과학기술연구원 재료연구단)
  • Published : 1993.02.01
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Abstract

Grinding of 3mol% Y-TZP enhanced the texturing of t-ZrO2, which is represented by the increased I(002)t/I(200)t peak intensity ratio, and an asymetric broadening of (111)t peak. The degree of texturing and asymetric broadening depended on a seversity of grinding. The asymetric (111)t peak broadening was resulted by the formation of r-ZrO2. When aged at 25$0^{\circ}C$ for 120h, r-ZrO2 transformed to t-ZrO2 due to the relief of stressed surface area and the amount of tlongrightarrowm transformation inversely varied with the I(002)t/I(200)t. The inverse dependence was interpreted by that the degree of texturing determines the magnitude of residual surface stress and the lattice relaxation of t-ZrO2, which causes the low temperature degradation, is retarded as the residual stress becomes greater.

Keywords

References

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