PRODUCTION OF TANTALUM CARBIDE

PRODUCTION OF TANTALUM CARBIDE

PROBLEM TO BE SOLVED: To produce low oxygen and low free carbon high-quality tantalum carbide in a good yield. SOLUTION: Tantalum oxide is mixed with carbon and primary carbonization is carried out at a prescribed temp., preferably 1,400-1,800 deg.C in a hydrogen furnace. The amts. of oxygen and fre...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SUGIMOTO TSUKASA, ISAKA HIROMICHI
Format: Patent
Sprache:eng
Schlagworte:
BORING
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
TRANSPORTING
TURNING
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To produce low oxygen and low free carbon high-quality tantalum carbide in a good yield. SOLUTION: Tantalum oxide is mixed with carbon and primary carbonization is carried out at a prescribed temp., preferably 1,400-1,800 deg.C in a hydrogen furnace. The amts. of oxygen and free carbon in the resultant carbide are measured, carbon is added to the primary carbide by an amt. adjusted on the basis of the measurements and secondary carbonization is carried out at a prescribed temp., preferably 1,800-2,000 deg.C in a vacuum carbonization furnace.