Flowable powder for high temperature plasma spray coating applic

Details Flowable powder for high temperature plasma spray coating applic Flowable powder for high temperature plasma spray coating applic

1997-07-18

1998-11-17

Szekely, Peter A.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

1061981, C08L 128, C08L 126, C08K 310, C08K 334

Patent

active

058370480

ABSTRACT:
This invention relates to a process for making powders for plasma spray coatings from single components and multiple component having dissimilar particle size and density, which can withstand temperatures in excess of 200.degree. C. within a plasma spray gun and still be freely flowable. In this invention a process for enhancing the high temperature flowability of a powder for spray coatings is disclosed. The process includes the following steps. A powder selected from one of a metal, a ceramic, or mixtures thereof is mixed with a blend of polymeric cellulose ether and water to a dough-like consistency. The powder and the blend are mixed in a volumetric ratio in the range of about 90:10 to about 99:1, powder:blend and a paste is formed. The paste is dried. The dry paste is particulated and a flowable powder having a particle size the range of about 50 .mu.m to about 300 .mu.m is formed.

REFERENCES:
patent: 5690724 (1997-11-01), Hester et al.

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