도재용착용 Ni-Cr 합금의 열처리에 따른 전단결합강도에 관한 연구
Study on Shear Bond Strength of Ceramics Fused to Ni-Cr Alloys by Heat Treatment
이정환, 고은경, 주규지,
소속 상세정보
이정환 ( Lee Jung-Hwan ) - 광주보건대학교 치기공과
고은경 ( Ko Eun-Kyoung ) - 광양보건대학 치위생과
주규지 ( Joo Kyu-Ji ) - 광주보건대학 치기공과
KMID : 0362220100370020151
Abstract
The purpose of this study was to evaluate fine structure of ceramics fused by heat treatment to metallic oxide surfaces Verabond V (beryllium-infused Ni-Cr alloy) and Verabond 2V (niobium-infused Ni-Cr alloy), and to observe the change between metallic oxide with opaque layer, and to measure the shear bond strength between the ceramic and metallic oxide, and to compare and analyze the results. Within the limits of this study, the following conclusions were drawn: 1. The observation of surface morphology of the oxide films of the specimens by SEM showed that Verabond V alloy observed a needle like structure and Verabond 2V observed a coarsening with an increasing degassing hold time. 2. Verabond V alloy showed gradually decreasing Ni and Cr ratios from metal surface between metallic oxide and opaque layer, whilst Verabond 2V alloy showed a gradually decreasing Ni ratio from the metal surface, but the Cr ratio increased remarkably from oxide layer. 3. Verabond V group, containing Be, showed a higher bond strength than the Verabond 2V group which contained Nb. 4. The shear bond strength measured highest to V5, 2V5 groups with 10 minutes hold time under air, and measured lowest from V1, 2V1 groups which were not treated with heat, and there was a significant difference (p<0.05).
키워드
Ni-Cr Alloy; Shear Bond Strength; Metal-ceramic Bonding
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