Korean Journal of Dental Materials (대한치과재료학회지)

Korean Society For Dental Materials (대한치과재료학회)
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Effect of Ice-Quenching After Degassing on the Hardness Change During Simulated Porcelain Firing in a Metal-Ceramic Pd-Au-Ag Alloy

Pd-Au-Ag계 금속-도재용 합금의 탈가스 처리 후 급냉 처리가 모의소성과정에서 경도변화에 미치는 영향

  • Kim, Sung-Min (Department of Dental technology, College of Health Science, Gimcheon University) ;
  • Shin, Hye-Jung (Department of Dental materials and BK21 PLUS Project, School of Dentistry, Pusan National University) ;
  • Kwon, Yong-Hoon (Department of Dental materials and BK21 PLUS Project, School of Dentistry, Pusan National University) ;
  • Kim, Hyung-Il (Department of Dental materials and BK21 PLUS Project, School of Dentistry, Pusan National University) ;
  • Seol, Hyo-Joung (Department of Dental materials and BK21 PLUS Project, School of Dentistry, Pusan National University)
  • 김성민 (김천대학교 치기공학과) ;
  • 신혜정 (부산대학교 치의학전문대학원 치과재료학교실 및 BK21플러스 사업단) ;
  • 권용훈 (부산대학교 치의학전문대학원 치과재료학교실 및 BK21플러스 사업단) ;
  • 김형일 (부산대학교 치의학전문대학원 치과재료학교실 및 BK21플러스 사업단) ;
  • 설효정 (부산대학교 치의학전문대학원 치과재료학교실 및 BK21플러스 사업단)
  • Received : 2016.08.17
  • Accepted : 2016.09.17
  • Published : 2016.12.30
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Abstract

The effect of ice-quenching after degassing on the hardness change during simulated porcelain firing in a metal-ceramic Pd-Au-Ag alloy was investigated by means of hardness test, field emission scanning electron microscopic observations, and X-ray diffraction analysis. The hardness decreased by ice-quenching after degassing, which was induced by the homogenization of the ice-quenched specimen. The decreased hardness by ice-quenching after degassing was recovered from the 1st opaque stage which was the first stage of the remaining firing process for bonding porcelain. The microstructural change showed that the increase in hardness during the remaining firing process was caused by precipitation. The ice-quenching after degassing did not affect the hardness change during the subsequent porcelain firing process.

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Acknowledgement

Supported by : 한국연구재단