Conclusions
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1.
A study was made of the hot pressing of oxides of the iron group metals in powder form, and the effects were determined of temperature, process time, and applied pressure on their relative density.
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2.
It is shown that the densification of powders of these oxides can be described within the frame-work of the theory of volume viscous flow of porous solids.
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3.
It was established that the deformation rate of particles of these oxide powders in hot pressing obeys the law έ∼σ, i.e., is proportional to the applied pressure.
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4.
The energy of activation for the creep of oxide powder particles in hot pressing and the micro-hardness of oxide specimens produced by this method were determined.
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Literature cited
G. V. Samsonov and M. S. Koval'chenko, Hot Pressing [in Russian], Gostekhizdat USSR, Kiev (1962).
P. Murray, D. T. Livey, and J. Williams, Ceramic Production Processes [Russian translation], IL, Moscow (1960).
V. Ya. Riskin and V. V. Goncharov, Ogneupory, No. 4, 183 (1957).
F. L. Pevzner and F. Ya. Kharitonov, Ogneupory, No. 2, 38 (1966).
M. S. Koval'chenko, Poroshkovaya Met., No. 10, 38 (1971).
H. G. van Bueren, Defects in Crystals [Russian translation], IIL, Moscow (1962).
R. W. Cahn (editor), Physical Metallurgy, 2nd ed., Elsevier (1971).
J. Friedel, Les Dislocations, Gauthier-Villars, Paris (1956).
R. C. Folweiler, J. Appl. Phys.,32, No. 5 (1961).
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Translated from Poroshkovaya Metallurgiya, No. 11 (119), pp. 24–28, November, 1972.
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Koval'chenko, M.S., Fen', E.K. Hot pressing of oxides of the iron group metals. Powder Metall Met Ceram 11, 881–884 (1972). https://doi.org/10.1007/BF00806646
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DOI: https://doi.org/10.1007/BF00806646