Production of powdery intermetallic compound having very fine pa

Details Production of powdery intermetallic compound having very fine pa Production of powdery intermetallic compound having very fine pa

1992-09-04

1994-08-16

Roy, Upendra

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

75343, 420900, B22F 900

Patent

active

053383338

ABSTRACT:
An intermetallic compound such as Nb.sub.3 Al exhibits the phenomenon of self-disintegration, when hydrogen is adsorbed in the intermetallic compound. This self-disintegration is used for the pulverization of the intermetallic compound material. The material is autogeneously pulverized into very fine particles only by adjusting an atmosphere to which the material is exposed, since the pulverizing reaction occurs between hydrogen existent in the atmosphere and the active surface of the intermetallic compound. The pulverized intermetallic compound having irregular shapes and large specific surface area is useful in various technical fields, e.g. as a superconductive material, a heat-resistant material, a magnetic body or a hydrogen-absorbing material.

REFERENCES:
patent: 4565686 (1986-01-01), Kumar
patent: 4637927 (1987-01-01), Komatsu et al.
patent: 4639363 (1987-01-01), Komatsu et al.
Misawa et al Jour Less-Common Metals, 89 (1983) 19-25.
Schulze et al Jour Less-Common Metals 139 (1988) 97-106.

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