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US 12,344,559 B2Granted
Decorative ceramic item
AssigneeThe Swatch Group Research and Development Ltd
InventorsBernard Bertheville, Yann Fallet
Life of this patent
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Abstract
A decorative item is made of a ceramic material, where ceramic material includes a carbide phase and an oxide phase, the carbide phase being present in a percentage by volume comprised between 50 and 95% and the oxide phase being present in a percentage by volume comprised between 5 and 50%. The decorative item is manufactured by a method of powder metallurgy.
Claims20
A decorative item, comprising:
- a ceramic material comprising (i) Mo2C in range of from 70 to 85 vol. %
- and (ii) Al2O3 in a range of from 15 to 30 vol. %,
- wherein the item has a hardness HV30 in a range of from greater than 1319 to 1800 and a toughness KiC in a range of from 3.5 to 8.5 MPa·m1/2.
A decorative item, comprising:
- a ceramic material comprising (i) Mo2C in range of from 51 to 72 vol. %
- and (ii) Al2O3 in a range of from 28 to 49 vol. %
- wherein the item has a hardness HV30 in a range of from 1319 to 1800 and a toughness KiC in a range of from 3.5 to 8.5 MPa·m1/2.
Dependencies are inferred from the claim text.