Abstract
The relation has been established between the relative density of hot-pressed materials based on molybdenum disulfide and temperature, time, and applied pressure. The process of densification of a mixture of molybdenum disulfide and molybdenum powders in hot pressing is described by a volume viscous-flow equation allowing for the nonlinear dependence of the rate of flow of the solid phase of the porous material on stress. The effective rate of creep of the solid phase in hot pressing (1400°C) is inversely proportional to the gas pressure in the closed pores. Reduced rates of steady-state creep have been calculated, and the exponent n indicative of linearity of flow of the solid phase forming the porous solid has been determined.
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