|Author||Gifford, F. E. ♦ Coomes, E. A.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||METALS, CERAMICS, AND MATERIALS ♦ DEFECTS ♦ EVAPORATION ♦ HEAT TREATMENTS ♦ HIGH TEMPERATURE ♦ MOLYBDENUM ♦ MONOCRYSTALS ♦ MOTION ♦ RECRYSTALLIZATION ♦ ROTATION ♦ SURFACES ♦ TENSILE PROPERTIES ♦ THICKNESS ♦ TORSION ♦ TUNGSTEN ♦ VOLUME ♦ WIRES|
|Abstract||When an optimum amount of permanent twist is introduced in 3- to 10-mil filaments of molybdenum or tungsten, single crystals up to 15 cm in length grow by either the moving gradient or Robinson techniques. About 5 turns per inch for W at 2500 deg K or for Mo at 1650 deg K was favorable. Although there is evidence of perfection in the volume of the crystals, the twist leaves a threadlike surface imperfection which remains even after severe heat treatment at evaporation temperatures. (auth)|
|Learning Resource Type||Article|
|Publisher Department||Univ. of Notre Dame, Ind.|
|Journal||Journal of Applied Physics|
|Organization||Univ. of Notre Dame, Ind.|
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