Method for manufacturing a part based on multiple precious metals, and resulting part

A process for manufacturing a watch component based on at least two precious or noble metals or alloys of precious or noble metals, remaining distinct from one another, said watch component comprising at least 50% or 80% or more, by mass of these metals and/or alloys, the method comprising:

• selecting
• a first material in the form of a first powder, said first material having a first melting temperature at atmospheric pressure,
• a second material in the form of a second powder, said second material having a second melting temperature at atmospheric pressure,
• and optionally one or more additional materials different from the first and second materials, in the form of as many corresponding additional powders,
• A step S3 of arranging said materials in powder form in a mold, so as to form an assembly of at least two unmixed powders, in which said powders are in contact,
• A step S4 of sintering under conditions that produce a solid part from the assembly of unmixed powders,
• A step S5 of demolding said solid part to obtain a demolded part, wherein said first, second and additional materials designate said precious or noble metals or precious or noble metal alloys contained in the watch component, and the sintering is a flash or SPS type sintering, operated at a sintering temperature and a sintering pressure, said sintering temperatures and pressures being determined so that none of said materials melts.