The compaction dynamics of Cu + Al 2 O 3 powder mixture under impulse hot pressing is simulated using a third-order dynamic system. The computer simulation has established the time dependence of the force induced by mechanical interaction between the impact machine and a heated porous blank, time variation in density, and root-mean-square strain rates and stresses in the matrix that forms the porous body. The phase trajectory of dynamic system from the beginning of compaction to the elastic recoil of the hammer block characterizes impact dynamics. The mechanical-thermal effect induced by bulk viscous flow and manifested itself as an increase in temperature of the porous body is determined. It is established that the shear viscosity of the porous body matrix shows a stronger dependence upon the initial impact velocity in comparison with the heating temperature. The activation energy of the matrix viscous flow is equal to 0.266 eV.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.