APPLICATION OF SKOROKHOD’S RHEOLOGICAL THEORY OF SINTERING TO ANALYZE THE SINTERING KINETICS OF TUNGSTEN POWDERS

 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2019, #07/08
http://www.materials.kiev.ua/article/2856

Abstract

The published papers of Valerii Skorokhod focusing on experimental and theoretical studies of fine powder sintering are analyzed. The application of Skorokhod’s rheological theory of sintering to analyze the sintering kinetics of fine tungsten powders is demonstrated. The history of discovering and explaining a fundamentally new phenomenon of locally nonuniform compaction in the sintering of actual powders bodies and its effect on the subsequent sintering process are outlined. The reasons why the physical theories of sintering could not be fully consistent with the experimental sintering of actual powder bodies are addressed. The structurization processes are found to have a predominant effect on the kinetic and thermodynamic compaction factors in sintering.


FINE TUNGSTEN POWDERS, LOCALLY NONUNIFORM COMPACTION, SKOROKHOD’S RHEOLOGICAL THEORY OF SINTERING, STRUCTURAL AND GEOMETRIC COMPACTION FACTORS