Ponderomotive effects during contact formation in microwave sintering

作     者：Olevsky, Eugene A. Maximenko, Andrey L. Grigoryev, Evgeny G. 

作者机构：San Diego State Univ Powder Technol Lab San Diego CA 92182 USA Moscow Engn Phys Inst Key Lab Electromagnet Field Assisted Proc Novel M Moscow 115409 Russia 

出 版 物：《MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING》 (材料科学与工程中的模型建立与模拟)

年 卷 期：2013年第21卷第5期

页      面：055022-55022页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：US Department of Energy, Materials Sciences Division through the Powder Technology Laboratory at the San Diego State University [DE-SC0008581] Ministry of Science and Education of Russian Federation through the Key Laboratory for Electromagnetic Field Assisted Processing of Novel Materials at Moscow Engineering Physics Institute [11.G34.31.0051] 

主　　题：DYNAMICS SINTERING ELECTRODIFFUSION MICROWAVE sintering ELECTROMAGNETIC theory ELECTRIC field effects CRYSTAL grain boundaries 

摘      要：An assessment of the ponderomotive effect contributions to the kinetics of single contact growth during sintering is carried out. A considerable free surface electromigration during microwave sintering in a polarized electromagnetic field is determined at inter-particle interfaces. It is shown that the electromigration flux reaches its maximum near the inter-particle contact edge and it is equivalent to the compressive stress acting on the contact between particles. The compressive stress is proportional to the intensity of the electric field at the inter-particle neck and inversely proportional to the ratio of the grain boundary and surface diffusivities. The electromigration matter transport can substantially accelerate the shrinkage rate during microwave sintering in comparison with conventional sintering.