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Sintering of very fine molybdenum and tungsten powders

  • Theory and Technology of Sintering, Thermal, and Chemicothermal Treatment Processes
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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

Vacuum annealing at a temperature above 900°K enables the specific surfaces of very fine loose tungsten and molybdenum powders to be varied in a wide range. The vacuum sintering of compacts pressed from very fine (particle size less than 0.05μm tungsten and molybdenum powders is accompanied by severe cracking. In the hot pressing of very fine Mo and W powders produced by the pyrolysis of carbonyls in a stream of high-temperature plasma, a specimen density close to theoretical is reached at 1600°K i.e., at a temperature not less than 400°K lower than the sintering temperatures of powders of particle size more than 1 μm. Sintering lowers the amounts of carbon and oxygen in Mo and W by more than half compared with the starting condition.

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Authors and Affiliations

  1. Institute of New Chemical Problems, Academy of Sciences of the USSR, USSR

    V. I. Torbov, V. N. Troitskii, T. V. Rezchikova, A. Z. Rakhmatullina, A. P. Zuev & V. N. Doronin

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  1. V. I. Torbov
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  2. V. N. Troitskii
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  3. T. V. Rezchikova
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  4. A. Z. Rakhmatullina
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  5. A. P. Zuev
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  6. V. N. Doronin
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Additional information

Translated from Poroshkovaya Metallurgiya, No. 1(229), pp. 47–51, January, 1982.

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Torbov, V.I., Troitskii, V.N., Rezchikova, T.V. et al. Sintering of very fine molybdenum and tungsten powders. Powder Metall Met Ceram 21, 42–45 (1982). https://doi.org/10.1007/BF00791724

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  • DOI: https://doi.org/10.1007/BF00791724

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