Process for treating high temperature corrosion resistant compos

Details Process for treating high temperature corrosion resistant compos Process for treating high temperature corrosion resistant compos

1997-06-13

1998-12-01

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

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

428678, 428937, 427456, C23C 408, C23C 412, B32B 1501

Patent

active

058435875

ABSTRACT:
A process for treating a high temperature corrosion resistant composite surface is disclosed. The process includes the steps of forming a first alloy layer by coating a metallic base material with a NiCr alloy or a MCrAlY alloy (M being made of one or more selected from the group consisting of Fe, Ni and Co) with low pressure plasma spraying, forming a second alloy layer on the first alloy layer by coating the first layer with an alloy having identical composition with atmospheric plasma spraying and then subjecting these layers to thermal diffusion treatment in a vacuum furnace or an inert gas atmosphere furnace. Thus, high temperature corrosion resistance is provided for a metallic material used at high temperatures.

REFERENCES:
patent: 4585481 (1986-04-01), Gupta et al.
patent: 5082741 (1992-01-01), Taira et al.
patent: 5302465 (1994-04-01), Miller et al.

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