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Comparative evaluation of the effect of simulated porcelain firing cycle on the mechanical properties and microstructure of base metal ceramic alloys.

Singla, Amita and Shetty, Pratheek and Joseph, Mathai and Kotian, Ravindra (1999) Comparative evaluation of the effect of simulated porcelain firing cycle on the mechanical properties and microstructure of base metal ceramic alloys. Indian J Dent Res, 10 (4). pp. 122-129.

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Abstract

A comparison of mechanical properties and microstructure of four metal ceramic alloys in as-cast and heat-treated conditions resulted in significant differences. The alloys that were tested included two nickel-based and two cobalt-based metal ceramic alloys. Mechanical properties tested included strength, percent elongation and hardness. Ten tensile bars were cast for each alloy. Five of the ten bars for each alloy were randomly selected for heat treatment with the simulated porcelain firing cycle. Results indicated that the nickel-based alloys were weakened by the heat treatment and showed a decreased hardness and an increased elongation. The effects of heat treatment on the strength of cobalt-based alloys were variable, showing an increase in hardness and a decrease in elongation. Differences in mechanical properties exhibited by the alloys were related to compositional and microstructural changes

Item Type: Article
Subjects: Dentistry > MCODS Mangalore > Dental Materials
Dentistry > MCODS Mangalore > Prosthodontics
Depositing User: KMCMLR User
Date Deposited: 01 Jan 2014 06:50
Last Modified: 01 Jan 2014 06:50
URI: http://eprints.manipal.edu/id/eprint/138179

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