Oriented molybdenum or tungsten single crystal and manufacturing

Details Oriented molybdenum or tungsten single crystal and manufacturing Oriented molybdenum or tungsten single crystal and manufacturing

1997-07-08

1999-06-29

Kunemund, Robert

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth from solid or gel state

117 3, 117 7, 117 10, 117 6, 117 5, 117929, 117937, 420429, 420430, C30B 106

Patent

active

059163631

ABSTRACT:
Secondary recrystallized grains having a plurality of crystal orientations in a polycrystalline compact of molybdenum or tungsten, which contains at least one element selected from the group consisting of calcium and magnesium in amount of 0.007 to 0.090 atom %, are formed by locally heating an end portion(s) of the polycrystalline compact. Some grains, which have a prescribed crystal orientation, selected from these secondary recrystallized grains are subsequently grown in the whole polycrystalline compact by annealing.

REFERENCES:
patent: 4491560 (1985-01-01), Fujii
patent: 5540182 (1996-07-01), Levinson

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