o:212 Physical chemistry data of some alloys in a Cu−Al−Au ternary system en ABSTRACT: Since physical chemistry data were not available for a Cu−Al−Au ternary system, physical chemistry analysis of this system was carried out experimentally using scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDX) and differential thermal analysis (DTA) measurements. The hardness, microhardness, and electrical conductivity as additional data of the investigated alloys in the Cu−Al−Au system were determined too. The shape memory effect, pseudoelasticity, biocompatibility, good resistance to corrosion and fatigue, and resistance to bending enable the application of Cu−Al−Au alloys to a large number of medical products, such as orthopedic and dental implants, products related to cardiovascular surgery, surgical instruments, etc. SEM-EDX analysis confirmed the existence of solid solutions based on copper, aluminum, and gold (Cu, Al, Au), β, ε, and γ phases, as well as intermetallic compounds AuAl2, Al2Cu, and AlCu. The characteristic temperatures of the phase transformation were determined by DTA. The results of hardness and microhardness showed that the highest values were measured in alloys whose composition included the γ phase. Received: July 5, 2021 Revised: October 14, 2021 Published: October 26, 2021 91552100 65247241 1552099 10.1021/acs.jpcc.1c05978 2022-05-06T19:46:21.735Z 44 yes 46 Ana Kostov Institut za rudarstvo i metalurgiju Bor ; Mining and Metallurgy Institute Bor Zdenka Stanojević Šimšić Institut za rudarstvo i metalurgiju Bor ; Mining and Metallurgy Institute Bor person Aleksandra Milosavljević Institut za rudarstvo i metalurgiju Bor ; Mining and Metallurgy Institute Bor person application/pdf 9679115 https://unilib.phaidrabg.rs/o:212 no yes 1 70 92000001 71A03 Journal of physical chemistry. C. 125 24043 24051 2021