Metallic material made from tungsten or molybdenum, method of pr

Details Metallic material made from tungsten or molybdenum, method of pr Metallic material made from tungsten or molybdenum, method of pr

1998-07-22

1999-10-26

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

419 3, 419 4, 419 28, 419 29, C22C 109

Patent

active

059720697

ABSTRACT:
A primary product comprising tungsten or molybdenum accommodated in a container 1 is heated at 500.degree. C. with 1000 atmospheric pressure in an Ar gas atmosphere and retained for 1 hour. According to the present invention, the crystal orientation in the (110) face can be 99% or more, and thus a material with a good electron radiation characteristic can be obtained.

REFERENCES:
patent: 3802851 (1974-04-01), Dunham
patent: 4514234 (1985-04-01), Fukasawa et al.
patent: 4923673 (1990-05-01), Litty
patent: 5087299 (1992-02-01), Fukuchi et al.
patent: 5145512 (1992-09-01), Spencer et al.
patent: 5440995 (1995-08-01), Levitt
patent: 5742891 (1998-04-01), Patrician et al.

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