도재소부용 금합금에서 인듐, 주석 첨가가 금속-도재계면 특성에 미치는 영향
Effects of Indium and Tin on Interfacial Property of Porcelain Fused to Low Gold Alloys
남상용, 곽동주, 정석민,
소속 상세정보
남상용 ( Nam Sang-Yong ) - 대구보건대학 치기공과
곽동주 ( Kwak Dong-Ju ) - 대구보건대학 치기공과
정석민 ( Chung Suk-Min ) - 대구보건대학 치기공과
KMID : 0362120010230010031
Abstract
This study was performed to observe the micro-structure change of surface, behavior of oxide change of element, the component transformation of the alloy and the bonding strength between the porcelain interface in order to investigate effects of indium, tin on interfacial properties of porcelain fused to low gold alloy. Hardness of castings was measured with a micro-Vicker’s hardness tester. The compositional change of the surface of heat-treated specimen was analyzed with an EDS and an EPMA. The interfacial shear bonding strength between alloy specimen and fused porcelain was measured with a mechanical testing system(MTS 858.20). The results were as follows: 1) The hardness value of alloy increased as increasing amount of indium addition. 2) The formation of oxidation increased as increasing indium and tin contents after heat treatment. 3) Diffusion of indium and tin elements increased as increasing indium and tin contents in metal-porcelain surface after porcelain fused to metal firing. 4) The most interfacial shear bonding strength was increased as increasing a composition of adding elements, and a heat-treatment time, and an oxygen partial pressure. From the results of this study it was found that the addition of alloying elements such as indium and tin increase hardness of as-cast alloy, produce surface oxide layer of adding elements by heat-treatment which may improve interfacial bonding strength between alloy and porcelain.
키워드
Hardness value; surface oxider layer; bonding strength; heat-treatment
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