EFFECT OF INDIUM ADDITION ON MICROSTRUCTURE AND STRENGTH OFAu–Pt–Cu–SnDENTAL BIOMATERIAL

Jai Won Byeon ()
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Jai Won Byeon: Department of Materials Science and Engineering, Seoul National University of Technology, Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 01, 99-103

Abstract: Through our previous screening experiments for a new dental alloy design, anAu–11.9Pt–0.6Cu–0.5Snalloy was selected as a candidate in terms of good strength and surface properties. In this report, the effects ofIn(indium) on the microstructures and hardness of a dentalAu–11.9Pt–0.6Cu–0.5Sn–xInalloy (wherex = 0, 0.25, 0.5, 0.75, and 1.0 wt.%) was investigated. The hardness of theAu–11.9Pt–0.6Cu–0.5Sn–xInalloys increased with increasingIncontent up to 0.75 wt.% and then started to decrease with further increase inIncontent. Particularly, the alloy containing 0.75%Inexhibited noticeably high hardness of 172 Hv. With the addition ofInto theAu–Pt–Cu–Snalloy, grain size decreased and a large number of fine precipitates were formed. The precipitates were identified asPt3(Sn, In)by convergent beam electron diffraction (CBED) and nanospot energy dispersive spectroscopy (EDS). The increased hardness with the addition ofInwas attributed to the precipitation hardening ofPt3(Sn, In)and the grain refinement.

Keywords: DentalAuȃPt–Cu–Sn–Inalloy; indium addition; aging heat treatment; Pt3(Sn; In) (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10014028

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