Component for timepiece or piece of jewellery made of cermet
View Patent ↗A component suitable for a timepiece or a jewellery item may be made of a cermet material including a carbide phase and a metal binder phase selected from among gold, platinum, palladium rhodium, osmium, ruthenium, and one of the alloys thereof. The metal binder phase may be present in a range of from 3 and 25 wt. % and the carbide phase may be present in a range of from 75 and 97 wt. %.
1 . A non-ferromagnetic component, comprising:
a cermet material having a carbide phase consisting of at least one carbide selected from the group consisting of titanium carbide, molybdenum carbide, silicon carbide and niobium carbide;
Si 2 Ti or Si 2 Zr; and
a metallic binder phase comprising platinum,
wherein
the metallic binder phase is present in a range of from 3 to 24 wt. %,
the carbide phase is present in a range of from 75 to 96 wt. %,
the Si 2 Ti or Si 2 Zr is present in a range of from 1 to 3 wt. %, and
the non-ferromagnetic component does not comprise ruthenium, nickel and cobalt.
2 . The non-ferromagnetic component of claim 1 , wherein the metallic binder phase is present in a range of from 3 to 21 wt. %, and
the carbide phase is present in a range of from 78 to 96%.
3 . The non-ferromagnetic component of claim 1 , wherein the metallic binder phase is present in a weight percentage between 6 and 21% and the carbide phase is present in a weight percentage between 78 and 93%.
4 . The non-ferromagnetic component of claim 1 , wherein when the carbide phase consists of titanium carbide and at least one other carbide selected from the group consisting of molybdenum carbide, silicon carbide and niobium carbide as other carbides, the titanium carbide is present in a greater percentage than the other carbides, and
when the carbide phase consists of molybdenum carbide and at least one other carbide selected from the group consisting of titanium carbide, silicon carbide and niobium carbide as other carbides, the molybdenum carbide is present in a greater percentage than the other carbides.
5 . The non-ferromagnetic component of claim 1 , wherein the carbide phase consists of titanium carbide and molybdenum carbide, wherein the titanium carbide is present in a greater percentage than the molybdenum carbide.
6 . The non-ferromagnetic component of claim 1 , wherein the carbide phase consists of titanium carbide and silicon carbide, wherein the titanium carbide is present in a greater percentage than the silicon carbide.
7 . The non-ferromagnetic component of claim 1 , wherein when the carbide phase consists of molybdenum carbide and at least one carbide selected from the group consisting of titanium carbide, silicon carbide and niobium carbide as other carbides, the molybdenum carbide is present in a greater percentage than the other carbides.
8 . The non-ferromagnetic component of claim 1 , having a hardness HV30 in a range of from 700 to 1900.
9 . The non-ferromagnetic component of claim 1 , wherein when the carbide phase consists of molybdenum carbide and at least one carbide selected from the group consisting of titanium carbide, silicon carbide and niobium carbide as other carbides, the molybdenum carbide is present in a greater percentage than the other carbides,
the metallic binder phase comprises gold and copper, and
a tenacity K iC of the non-ferromagnetic component is greater than or equal to 4 MPa·m 1/2 .
10 . The non-ferromagnetic component of claim 1 , wherein
when the carbide phase consists of molybdenum carbide and at least one carbide selected from the group consisting of titanium carbide, silicon carbide and niobium carbide as other carbides, the molybdenum carbide is present in a greater percentage than the other carbides,
the metallic binder phase comprises palladium, and
a tenacity K iC of the non-ferromagnetic component is greater than or equal to 8 MPa·m 1/2 .
11 . The non-ferromagnetic component of claim 1 , having, in a CIELAB color space, a component L* in a range of from 60 to 90.
12 . The non-ferromagnetic component of claim 1 , wherein
when the carbide phase consists of molybdenum carbide and at least one carbide selected from the group consisting of titanium carbide, silicon carbide and niobium carbide as other carbides, the molybdenum carbide is present in a greater percentage than the other carbides, and
the non-ferromagnetic component has in a CIELAB color space, a component L* in a range of from 77 to 85.
13 . The non-ferromagnetic component of claim 1 , which is an external part component or movement in watchmaking.
14 . The non-ferromagnetic component of claim 4 , wherein the molybdenum carbide is present in a greater percentage than the other carbides and a hardness HV30 of the non-ferromagnetic component is in a range of from 700 to 1300.
15 . The non-ferromagnetic component of claim 4 , wherein the carbide phase consists of titanium carbide and silicon carbide, the titanium carbide is present in a greater percentage than the silicon carbide, and a hardness HV30 of the non-ferromagnetic component is in a range of from 1000 to 1900.
16 . A non-ferromagnetic component comprising:
a cermet material comprising a carbide phase; Si 2 Ti or Si 2 Zr; and a metallic binder phase of a metallic binder,
wherein
the Si 2 Ti or Si 2 Zr is present in a range of from 1 to 3 wt. %,
the metallic binder consists of gold, platinum, palladium, rhodium, osmium, or an alloy thereof,
the metallic binder phase is present in a range of from 6 to 24 wt. %,
the carbide phase is molybdenum carbide and is present in a range of from 75 to 93 wt. %, and
the non-ferromagnetic component is free from nickel and cobalt.
17 . The component of claim 16 , wherein
the metallic binder phase is present in a range of from 6 to 21 wt. %, and
the carbide phase is present in a range of from 78 to 93 wt. %.
18 . The component of claim 16 , having a hardness HV30 in a range of from 700 to 1900.
19 . The component of claim 16 , having a tenacity K iC greater than or equal to 2 MPa·m 1/2 .
20 . The component of claim 16 , having, in a CIELAB color space, a component L* in a range of from 60 to 90.
21 . The component of claim 16 , which is an external part component or movement in watchmaking.