PALLADIUM-BASED JEWELLERY ALLOY (VERSIONS) Russian patent published in 2017 - IPC C22C5/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of noble metals and alloys, particularly to palladium-based alloys used in jewellery industry. According to one version alloy contains, wt%: palladium 50–95, nickel 3–5, silicon 0.5–2, boron 0.01–1.0, at least one element selected from a group comprising copper, gold, indium, gallium in amount of less than 1.0 each, at total content of nickel and silicon of up to 5 %, wherein alloy has a structure reinforced with intermetallide Ni₂Si. In another version alloy contains, wt%: palladium 50–85, nickel 11-13.5, aluminium 1.5–4, boron 0.01–1.0, at least one element selected from a group comprising copper, gold, indium, gallium, in amount of less than 1.0 each, at total content of nickel and aluminium of up to 15%, wherein alloy has structure reinforced with intermetallides Ni₃Al, NiAl, Ni₂Al₃.

EFFECT: technical result is improved strength properties and corrosion resistance of palladium alloy while maintaining level of casting properties, plasticity and white colour close to mounting plate.

2 cl, 2 ex