Process for providing titanium composite having a porous surface

Details Process for providing titanium composite having a porous surface Process for providing titanium composite having a porous surface

1986-11-20

1991-07-23

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 23, 419 20, 419 36, 419 37, 419 57, 419 53, 428550, 428553, 427191, 427226, 427247, 427336, 427352, 623 16, B22F 700

Patent

active

050341863

ABSTRACT:
A titanium or titanium alloy composite having a porous surface layer, which comprises a titanium or titanium alloy substrate and a porous titanium or titanium alloy layer that adheres strongly to said substrate, said porous layer being formed by first providing said substrate with a firmly adhering sinter of a mixture of a titanium or titanium alloy powder and a magnesium powder, and then removing magnesium from the sinter. A process for producing a titanium or titanium alloy composite having a porous surface layer, comprising: providing a coating composition comprising a binder added to a mixture of a titanium or titanium alloy powder and a magnesium powder; applying said composition to the surface of a titanium or titanium alloy substrate; heating the substrate at a temperature of from 650.degree. to 800.degree. C. in vacuo or an inert atmosphere so as to form a sinter of the powders of titanium or titanium alloy and magnesium which firmly adheres to said substrate; and removing magnesium from said sinter.

REFERENCES:
patent: 2447980 (1948-08-01), Hensel
patent: 3437457 (1969-04-01), Fisher
patent: 3762026 (1973-10-01), Shapiro
patent: 4644942 (1987-02-01), Sump
Uhlig, Corrosion and Corrosion Control, 2nd ed., 1971, p. 29.

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