Claims
- 1. A method of producing a dopant material comprising the steps of melting a dopant base metal selected from the group consisting of iron and nickel; adding rare earth metals, manganese, silicon, molybdenum, and chromium to the molten metal; heating the molten metal to a temperature above that required for the dissolution and formation of high melting point compounds selected from the group consisting of carbides, nitrides, carbonitrides, borides, and oxides of a metal selected from the group consisting of titanium, zirconium, tantalum, hafnium, and thorium; adding non-metallic elements selected from the group consisting of carbon, nitrogen, oxygen, boron, and elements selected from the group consisting of titanium, zirconium, tantalum, hafnium, and thorium to the molten mixture in stoichiometric ratio and in weight amounts which provide for the formation of from 3 to 25 volume percent of said high melting point compounds in said dopant material; and cooling said molten mixture at a rate of from 10.sup.2 to 10.sup.7 degrees per second resulting in the formation of said endogenous high melting point compounds having a particle size of not more than 5 microns in said dopant material.
- 2. A method as claimed in claim 2, wherein the manganese, silicon and molybdenum are added to the molten base metal in an amount of not more than 50 weight percent.
- 3. A method as claimed in claim 2, wherein the rare-earth metals are added to the molten base metal in an amount of from 0.001 to 10 weight percent.
- 4. A method as claimed in claim 2, wherein the chromium is added to the molten base metal in an amount of not more than 50 weight percent.
Parent Case Info
This is a continuation of U.S. Ser. No. 690,777, filed May 27, 1976, now abandoned which in turn, is a continuation of U.S. Ser. No. 469,751, filed May 14, 1974, now abandoned.
US Referenced Citations (4)
Continuations (2)
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Number |
Date |
Country |
Parent |
690777 |
May 1976 |
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Parent |
469751 |
Sep 1974 |
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