모의 소성에 따른 Au-Pd-Zn-In-Sn계 금속-도재용 합금의 경도 변화에 미치는 연화 열처리의 영향
Effect of softening-heat treatment on hardness change of an Au-Pd-Zn-In-Sn metal-ceramic alloy during porcelain firing simulation
신혜정, 유영준, 권용훈, 김형일, 설효정,
소속 상세정보
신혜정 ( Shin Hye-Jung ) - 부산대학교 치의학전문대학원 치과재료학교실
유영준 ( Yu Young-Jun ) - 부산대학교 치의학전문대학원 치과재료학교실
권용훈 ( Kwon Yong-Hoon ) - 부산대학교 치의학전문대학원 치과재료학교실
김형일 ( Kim Hyung-Il ) - 부산대학교 치의학전문대학원 치과재료학교실
설효정 ( Seol Hyo-Joung ) - 부산대학교 치의학전문대학원 치과재료학교실
KMID : 1035320150420040345
Abstract
The effect of softening-heat treatment on hardness change of an Au-Pd-Zn-In-Sn metal-ceramic alloy during porcelain firing simulation was examined. The metal-ceramic alloy was softened enough to improve the work efficiency for fit adjustments of the prosthesis before firing porcelain by solution-treatment at 980℃ for 10 min. The softening effect by solution-treatment disappeared at degassing stage. The final hardness of the solution-treated specimen was higher than that of the firing simulated specimen without solution-treatment. The α₂ phase precipitation in the solution-treated and then firing simulated specimen improved the hardness of specimen, and the α₂ phase was composed of the Au-Pd-Zn phase with an AuCu-type face-centered tetragonal structure. Therefore, the work efficiency and durability of the final prosthesis can be improved by softening-heat treatment before porcelain firing.
키워드
Au-Pd-Zn-In-Sn metal-ceramic alloy; solution-treatment; precipitation hardening; porcelain firing simulation
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