Method for producing ingot and powder of zirconium carbide

Patent metadata

Field	Value
Publication number	US-2016229698-A1
Application number	US-201415022612-A
Country	US
Kind code	A1
Filing date	Jul 4, 2014
Priority date	Sep 24, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

The present invention provides a method for producing an ingot of zirconium carbide at a low cost in an efficient manner.
The present invention, specifically, provides a method for producing an ingot of zirconium carbide, characterized in that the ingot produced has a size of 50 mm or more, a density of 5.7 g/cm 3 or more, and a Vickers hardness of 1,500 or more, and that the method includes the steps of:
(1) Step 1 of mixing zirconium oxide with carbon to obtain a mixture thereof, wherein the carbon is present in an amount of 15 to 20% by mass based on the zirconium oxide in the mixture; (2) Step 2 of forming the mixture into granules; (3) Step 3 of melting the granules using argon plasma; and (4) Step 4 of slowly cooling the melt to obtain the ingot of zirconium carbide.

First claim

1 . A method for producing an ingot of zirconium carbide, the method being characterized in that the ingot produced has a size of 50 mm or more, a density of 5.7 g/cm 3 or more, and a Vickers hardness of 1,500 or more, and that the method comprises the steps of:
(1) Step 1 of mixing zirconium oxide with carbon to obtain a mixture thereof, wherein the carbon is present in an amount of 15 to 20% by mass based on the zirconium oxide in the mixture; (2) Step 2 of forming the mixture into granules; (3) Step 3 of melting the granules using argon plasma; and (4) Step 4 of slowly cooling the melt to obtain the ingot of zirconium carbide.

2 . The method according to claim 1 , wherein the ingot of zirconium carbide has a size of 80 mm or more, a density of 6.0 g/cm 3 or more, and a Vickers hardness of 2,000 or more.

3 . A method for producing a zirconium carbide powder, the method comprising pulverizing the ingot of zirconium carbide obtained by the method according to claim 1 .

4 . An ingot of zirconium carbide, the ingot having a size of 80 mm or more, a density of 6.0 g/cm 3 or more, and a Vickers hardness of 2,000 or more.

5 . A method for producing a zirconium carbide powder, the method comprising pulverizing the ingot of zirconium carbide obtained by the method according to claim 2 .

Assignees

• Daiichi Kigenso Kagaku Kogyo

Inventors

• Nabeta Takuji

Classifications

• C01B31/303 Primary

  Chemistry & Metallurgy · mapped topic

• C04B35/622

  Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products · CPC title

• B28B1/54 Primary

  specially adapted for producing articles from molten material, e.g. slag {refractory ceramic materials}(chemical aspects C04B {; from molten bituminous material B29C}) · CPC title

• B28B17/026

  Conditioning ceramic materials · CPC title

• C04B35/653 Primary

  Processes involving a melting step · CPC title