Method for the preparation of an alloy of nickel and titanium

Details Method for the preparation of an alloy of nickel and titanium Method for the preparation of an alloy of nickel and titanium

1987-06-09

1988-01-12

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder shape or size characteristics

75246, 419 31, 419 38, 419 39, 419 46, 419 53, 419 54, B22F 100

Patent

active

047190779

ABSTRACT:
An alloy of nickel and titanium in the atomic ratio of 49:51 to 56:44 can be prepared at a temperature much lower than the eutectic point of the corresponding alloy. Thus, a green compact of a powdery mixture of the component metals is subjected to a heat treatment under high vacuum first at a rate of temperature elevation of 5.degree. to 30.degree. C./minute up to a temperature of, for example, 600.degree. C. and then at a rate of temperature elevation of at least 40.degree. C./minute up to a temperature of 815.degree.-900.degree. C. The surface of the metal particles is activated at the first stage along with degassing and the surface-activated metal particles are brought into an exothermic reaction at the second stage to cause explosive fusion and alloying.

REFERENCES:
patent: 3950166 (1976-04-01), Obara et al.
patent: 4478790 (1984-10-01), Huther et al.
patent: 4657822 (1987-04-01), Goldstein

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