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US 6,602,556 B2Granted
Ceramic shell thermal spray powders and methods of use thereof
AssigneeSaint-Gobain Abrasives Technology Company
InventorSung H. Yu
Life of this patent
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Abstract
Plasma spraying a substrate using particles having a ceramic coating on a combustible core, which may optionally be burned out before spraying, gives a potential for a thicker more conformable protective coat.
Claims16
A process for coating a substrate which comprises:
- a) forming a suspension comprising ceramic particles and particles of a combustible material dispersed in a liquid medium in which the average particle sizes of the combustible and ceramic components are in a ratio of from 100:1 to 5:1, the combustible particles have an average particle size of from 10 to 500 micrometers, and the volume proportions of ceramic particles to combustible particles is from 1:100 to 1:5;
- b) granulating the suspension to form composite particles in which the particles of combustible material are coated with the particles of the ceramic;
- and
- c) plasma spraying the composite particles on to the substrate.
1 more element
Dependencies are inferred from the claim text.