Low friction and galling resistant coatings and processes for co

Details Low friction and galling resistant coatings and processes for co Low friction and galling resistant coatings and processes for co

1985-02-21

1987-03-10

Pianalto, Bernard D.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

427 37, 427405, 4274197, 428336, 428614, 428678, 428679, 428680, B32B 1504

Patent

active

046490868

ABSTRACT:
The present invention describes coating processes and the resultant coated articles for use in high temperature sodium environments, such as those found in liquid metal fast breeder reactors and their associated systems. The substrate to which the coating is applied may be either an iron base or nickel base alloy. The coating itself is applied to the substrate by electro-spark deposition techniques which result in metallurgical bonding between the coating and the substrate. One coating according to the present invention involves electro-spark depositing material from a cemented chromium carbide electrode and an aluminum electrode. Another coating according to the present invention involves electro-spark depositing material from a cemented chromium carbide electrode and a nickel-base hardfacing alloy electrode.

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Bennett et al., "Materials Requirements for LMFBRs" Met. Trans. A, vol. 9A, Feb. 1978, pp. 143-149.
Johnson et al., "Development of Low Friction Materials for LMFBR Components," Proc. Int'l Conf. Liquid Metal Tech. in Energy Prod., USERDA Conf. Publ. 760503-P1 U.S. ERDA, Wash. DC (1976).
Johnson et al., "Wear Resistant Coatings for Reactor Components in Liquid Sodium Environments," Journal of Vac. Sci. & Tech., vol. 11, No. 4, Jul./Aug. 1974, pp. 759,764.
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