Au-Pd-In계 금속-세라믹용 합금의 모의소성시 용체화처리에 의한 경도와 미세구조의 변화
Changes in hardness and microstructure of a solution-treated Au-Pd-In alloy for porcelain bonding during porcelain firing simulation
전병욱, 권용훈, 김형일, 설효정,
소속 상세정보
전병욱 ( Jeon Byung-Wook ) - 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 : 1035320140410040311
Abstract
Changes in hardness and microstructure of a solution-treated Au-Pd-In alloy for porcelain bonding during porcelain firing simulation were elucidated by means of hardness test, field emission scanning electron microscope (FE-SEM) observations, X-ray diffraction (XRD) analysis and energy dispersive spectrometer (EDS) analysis. The most effective hardening of alloy during cooling after porcelain firing was obtained when the firing chamber moved immediately to upper end position and then air cooled. In the solution-treated specimen after casting, the hardness decreased dramatically. However, after degassing treatment which is the first firing stage, the hardness value of solution-treated specimen increased rapidly, and such a high hardness was maintained during the consecutive firing stages. In a Cu-free Au-Pd-In alloy for porcelain bonding, the hardening effect of the solution treatment on simulated porcelain firing was caused by the grain interior precipitates of fine scale, which was composed of the ordered Ga₂Pd5 phase containing Au and In. From the above results, solution treatment is recommended to improve hardness of the Au-Pd-In alloy during porcelain firing.
키워드
solution treatment; porcelain firing simulation; Au-Pd-In alloy for porcelain bonding; cooling rate; microstructural change
원문 및 링크아웃 정보
등재저널 정보