Patent · US Active

Method for producing spray powders containing chromium nitride

US10695839B2 · kind B2 · utility

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1References

24Claims

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Assignee

H.H. STARCK SURFACE TECHNOLOGY AND CERAMIC POWDERS GMBH · DE

Inventors

Benno Gries · Wolfenbüttel, DE
Bernhard Bruening · Bad Harzburg, DE

Key dates

Filing date	Jan 23, 2014
Grant date	Jun 30, 2020
Priority date	—
Expiry date	Apr 14, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F2201/02
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for producing a sintered spraying powder comprising chromium nitride includes producing a powder mixture comprising a first powder and a second powder, and sintering the powder mixture to the sintered spraying powder at a nitrogen partial pressure of >1 bar so as to maintain or increase a chemically bound nitrogen in the sintered spraying powder compared to a chemically bound nitrogen in the first powder mixture. The first powder comprises at least one constituent selected from the group consisting of Cr, CrN and Cr2N. The second powder comprises at least one constituent selected from the group consisting of nickel, cobalt, nickel alloys, cobalt alloys and iron alloys.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.