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- W3174396585 abstract "For the refractory metals molybdenum and tungsten powder metallurgy methods are applied for economic reasons. For the production of doped qualities no other method is possible. Doping elements for tungsten are aluminium, potassium and silicon, for molybdenum potassium and silicion only. Production of Al-K-Si and K-Si doped tungsten and molybdenum wire out of the particulate state is described. Treatment of the oxide powders, reduction under hydrogen atmosphere, compaction of the metal powders and high temperature sintering are discussed separately for tungsten and molybdenum. Mechanical properties of doped tungsten and molybdenum wires in the range of 0,6-1,0 mm and 0,5 - 3,8 mm diameter respectively are discussed. Development of an overlapping grainstructure after recristallization together with an elevated recristallization temperature compaired to the undoped metals are characteristic properties. Thermomechanical treatment has influence on the formation of this overlapping grainstructure and thus on mechanical properties of the wires. Tensile strength and ductility data dependent on heat treatment and method and degree of deformation are discussed together with recristallization behaviour of doped and undoped material. For doped and pure tungsten wire also high temperature creep data are presented." @default.
- W3174396585 created "2021-07-05" @default.
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- W3174396585 date "1979-08-01" @default.
- W3174396585 modified "2023-09-26" @default.
- W3174396585 title "Production and properties of powder metallurgy molybdenum and tungsten doped wires" @default.
- W3174396585 hasPublicationYear "1979" @default.
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