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Author Gifford, F. E. ♦ Coomes, E. A.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
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)
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 1960-02-01
Publisher Department Univ. of Notre Dame, Ind.
Journal Journal of Applied Physics
Volume Number 31
Organization Univ. of Notre Dame, Ind.


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