Cobalt-refractory metal-boron glassy alloys

Details Cobalt-refractory metal-boron glassy alloys Cobalt-refractory metal-boron glassy alloys

1978-01-03

1979-01-09

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75134F, 75176, C22C 1903, C22C 2704, C22C 3000

Patent

active

041336828

ABSTRACT:
Glassy alloys containing cobalt and molybdenum or tungsten, together with low boron content, are disclosed. The glassy alloys of the invention consist essentially of about 5 to 12 atom percent boron, a member selected from the group consisting of about 20 to 50 atom percent molybdenum and about 15 to 40 atom percent tungsten and the balance essentially cobalt plus incidental impurities. The glassy alloys evidence hardness values of at least about 1130 Kg/mm.sup.2, ultimate tensile strengths of at least about 400 Kpsi and crystallization temperatures of at least about 570.degree. C.

REFERENCES:
patent: 3856513 (1974-12-01), Chen et al.
patent: 3871836 (1975-03-01), Polk et al.
patent: 3986867 (1976-10-01), Masumoto et al.
patent: 4056411 (1977-11-01), Chen et al.
patent: 4067732 (1978-01-01), Ray

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