Hollow sphere ceramic particles for abradable coatings

Details Hollow sphere ceramic particles for abradable coatings Hollow sphere ceramic particles for abradable coatings

1982-02-16

1984-05-22

Beck, Shrive P.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427423, 428402, B05D 110, B05D 502

Patent

active

044501846

ABSTRACT:
A hollow sphere ceramic flame spray powder is disclosed. The desired constituents are first formed into agglomerated particles in a spray drier. Then the agglomerated particles are introduced into a plasma flame which is adjusted so that the particles collected are substantially hollow. The hollow sphere ceramic particles are suitable for flame spraying a porous and abradable coating. The hollow particles may be selected from the group consisting of zirconium oxide and magnesium zirconate.

REFERENCES:
patent: 4039297 (1977-08-01), Takenaka
patent: 4290847 (1981-09-01), Johnson et al.
patent: 4303732 (1981-12-01), Torobin
patent: 4303737 (1981-12-01), Litchfield et al.
patent: 4349456 (1982-09-01), Sowman
Preparation and Characterization of ZrO.sub.2 and HfO.sub.2 Microballons, Gilman, Ceramic Bulletin, vol. 46, No. 6 (1967), pp. 593-595.

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