Rheological Models of Pressure Sintering of Powder Materials

 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2013, #01/02
http://www.materials.kiev.ua/article/904

Abstract

Rheological models for deformable bodies are used to develop a dynamic approach to the problem of mechanical actions on porous bodies during pressure sintering. The solutions of dy-namic systems are described for the force applied to porous viscoelastic non-hardening and strain-hardening bodies depending on control parameters of the systems. These parameters are determined by the inertial properties and rigidity of the strain generating machine and the rheo-logical properties of the deformable bodies. The intensity of densification during the pressure sintering of porous bodies mainly depends on the relation of system rigidity to body viscous resis-tance. The simulation and analysis of porous bodies under pressure sintering using the obtained solutions enable prediction of their densification conditions and functional properties depending on the machine characteristics and sizes and rheological properties of deformable bodies.


DYNAMIC SYSTEM, POROUS BODY, PRESSURE SINTERING, RHEOLOGICAL MODELS, STRAIN