Method of etching ceramic frictional or sealing elements

Details Method of etching ceramic frictional or sealing elements Method of etching ceramic frictional or sealing elements

1988-09-07

1991-07-16

Fisher, Richard V.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156667, 252 792, C25F 300

Patent

active

050322150

ABSTRACT:
Combinations of frictional and sealing elements made from hard substances, such as sintered aluminum oxide, are ground and lapped at their surfaces of engagement. At least one surface has at least some micro-blurred areas. The micro-blurring is produced by chemical etching. Phosphoric acid can be used as the chemical etching, and in thermal etching, the etching temperature is between 1400.degree. and 1560.degree. C.

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patent: 4816114 (1989-05-01), Held

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