Influence of cryogenic treatment and age-hardening heat treatment on the microhardness of palladium-silver dental alloys.
- Author:
Yao ZHAO
1
;
Xu TONG
;
Jiajun LIU
;
Zhichao HAO
;
Yukun MENG
Author Information
- Publication Type:Journal Article
- MeSH: Copper; Dental Alloys; Gold Alloys; Hardness; Hot Temperature; Humans; Palladium; Silver
- From: West China Journal of Stomatology 2013;31(3):235-241
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEThe purpose of this study was to investigate the influence of cryogenic treatment and age-hardening heat treatment on the micro-Vicker's hardness of palladium-silver dental alloys.
METHODSA low-gold content dental casting alloy composed of Ag-Pd-Cu-Au was prepared for this study. Experimental specimens according to standard requirements were prepared following a standard dental laboratory casting procedure, cast specimens were heated to 900 degrees C and quenched in ice water. The specimens were then divided into 4 groups. They were subsequently subjected to different treatments, including age-hardening heat treatment, cryogenic treatment, heat treatment combined with cryogenic treatment. The non-treated group was used as control. The micro-Vicker's hardness value was examined. The significance of correlation was analyzed.
RESULTSThe micro-Vicker's hardness of specimens after age-hardening heat treatment, cryogenic treatment, heat treatment combined with cryogenic treatment increased by 129%, 13% and 141%, respectively, compared with that of the non-treated control group. Conclusion Age-hardening heat treatment and cryogenic treatment were effective in elevating the hardness of Ag-Pd-Cu-Au alloy.