Process for forming alloy layer

Details Process for forming alloy layer Process for forming alloy layer

1983-09-09

1985-04-23

Lusignan, Michael R.

Coating processes

Coating by vapor, gas, or smoke

Metal coating

427 76, 4272552, 430128, B05D 512, C23C 1100, C23C 1300

Patent

active

045130310

ABSTRACT:
A method of forming an alloy layer on the surface of a substrate comprising forming in a vessel a molten bath comprising at least one vaporizable alloying component having a higher vapor pressure than at least one other vaporizable alloying component in said bath, forming a thin, substantially inert, liquid layer of an evaporation retarding film on the upper surface of said molten bath, said liquid layer of an evaporation retarding film having a lower or comparable vapor pressure than both said vaporizable alloying component having a higher vapor pressure and said other vaporizable alloying component on said substrate, co-vaporizing at least a portion of both said vaporizable alloying component having a higher vapor pressure and said other vaporizable alloying component whereby said evaporation retarding film retards the initial evaporation of said vaporizable alloying component having a higher vapor pressure, and forming an alloy layer comprising both said vaporizable alloying component having a higher vapor pressure and said other vaporizable alloying component on said substrate.

REFERENCES:
patent: 2803542 (1951-08-01), Ullrich
patent: 2822300 (1958-02-01), Mayer
patent: 2938816 (1960-05-01), Gunthier
patent: 3489560 (1970-01-01), Joseph
patent: 3655377 (1972-04-01), Sechak
patent: 3655430 (1972-04-01), Greaves
patent: 4015029 (1977-03-01), Elchisak
patent: 4026703 (1977-05-01), Hayashi et al.
patent: 4277551 (1981-07-01), Sonnonstine et al.
patent: 4314014 (1982-02-01), Yamamoto et al.
patent: 4377607 (1983-03-01), Yoshida et al.

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