Patent ID: 11932579
Assignee: KANTHAL AB
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 7:
8. A process of manufacturing a chromium alloyed molybdenum silicide portion of a heating element comprising the steps of:
forming a mixture of a chromium powder and a silicon powder;
reacting the mixture to a reaction product in an inert atmosphere at a temperature of at least 1100° C. but not more than 1580° C.;
converting the reaction product to a powder comprising CrSi2;
forming a powder ceramic composition by mixing the powder comprising CrSi2 with a MoSi2 powder and optionally with an extrusion aid;
forming the portion of the heating element; and
sintering the portion of the heating element in a temperature of from about 1450° C. to about 1700° C.;
wherein the chromium powder and the silicon powder are provided separately to the mixture,
wherein the sintered portion of the heating element comprises more than 90 weight % Mo1-xCrxSi2 and the balance is extrusion aid and unavoidable impurities, and
wherein x is between 0.08 to 0.15.