Isothermal Age-Hardening Behaviour in Commercial Dental Gold Alloys containing Palladium

Koh-ichi UDOH; Kunihiro HISATSUNE; Katsuhiro YASUDA; Michio OHTA

doi:10.4012/dmj.3.253

Koh-ichi UDOH, Kunihiro HISATSUNE, Katsuhiro YASUDA, Michio OHTA

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Keywords: Gold alloy, Age-hardening, Electron microscopy

JOURNALS FREE ACCESS

Volume 3 (1984) Issue 2 Pages 253-261,333

DOI https://doi.org/10.4012/dmj.3.253

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Abstract

The isothermal age-hardening behaviour in the commercial dental gold alloys containing palladium was studied by means of resistometric, hardness, X-ray and electron microscopy. Drastic overageing occurred following prolonged ageing. The mechanism of the overageing was interpreted as a loss of coherency at the interfaces of the adjacent lamellae which consists of the equilibrium AuCu I ordered phase and the silver-rich α2 phase.

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