Journal of Technologic Dentistry (대한치과기공학회지)
- Volume 22 Issue 1
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- Pages.69-78
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- 2000
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- 1229-3954(pISSN)
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- 2288-5218(eISSN)
The Effect of Burn-out Temperature and Cooling Rate on the Microstructure and Corrosion Behavior of Dental Casting Gold Alloy
치과용 합금 주조 시의 소환온도와 주조 후 냉각방법이 미세조직과 부식거동에 미치는 영향
- Lee, Sang-Hyeok (Dental material Research Center, We Dong Myung Co., LTD) ;
- Ham, Duck-Sun (Dental material Research Center, We Dong Myung Co., LTD) ;
- Kim, Hak-Kwan (Dental material Research Center, We Dong Myung Co., LTD) ;
- Jang, Ju-Woong (Dental material Research Center, We Dong Myung Co., LTD) ;
- Kim, Myung-Ho (Dental material Research Center, We Dong Myung Co., LTD)
- 이상혁 ((주) 우리동명 치과재료 연구소) ;
- 함덕선 ((주) 우리동명 치과재료 연구소) ;
- 김학관 ((주) 우리동명 치과재료 연구소) ;
- 장주웅 ((주) 우리동명 치과재료 연구소) ;
- 김명호 ((주) 우리동명 치과재료 연구소)
- Published : 2000.12.10
Abstract
The microstructure and corrosion behavior of commercially dental casting gold alloys were investigated to clarify the effect of burn-out temperature and cooling rate. In the case of water quenching after casting, only the αphase, which is typical dendritic microstructure of golda alloy, was detected. However, the precipitates along the grain boundary were detected only at the slow cooling rate and they increased inversely proportional to the burn-out temperature. This might be due to the time difference which solute atom could diffuse. EPMA and SEM results also demonstrated that the precipitate should be lamellar structure consisted of Ag rich phase(
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