Vol.2, No 7, 1997 pp. 223 - 239
UDC 519.711:519.872:622.785:542.6 (Invited Paper)
MODELING AND COMPUTER SIMULATION OF DIFFUSION PROCESS DURING LIQUID PHASE SINTERING
Zoran S. Nikolić1, Momčilo M. Ristić2
1Faculty of Electronic Engineering, Department of Microelectronics
University of Niš, PO Box 73, 18000 Niš, Yugoslavia
2Serbian Academy of Sciences and Arts, Joint Laboratory for Advanced Materials
Knez Mihailova 35, 11000 Belgrade, Yugoslavia

Abstract. Liquid phase sintering is widely used for consolidation of materials. Low sintering temperatures, relatively fast densification and homogenization, and high final densities are the main advantages of this production method. A very interesting approach to better understanding of its extreme complexity due to the simultaneous and successive action of numerous elemental mechanisms would be the determination of the qualitative and quantitative effects from the stand-point of the process modeling and simulation. In that sense, this paper outlines a computer-based method for simulation of diffusion process and boundary migration on liquid/solid interfaces during liquid phase sintering This results could be especially of interest in an building a computer aided design system, which introduces a new way of investigation: developing a new engineering design on the basis of theoretical knowledge, experimental experience, process modeling and process simulation. 
MODELOVANJE I SIMULACIJA PROCESA DIFUZIJE TOKOM SINTEROVANJA U PRISUSTVU TEČNE FAZE
Sinterovanje u prisustvu tečne faze predstavlja tipičan proces za konsolidaciju materijala. Glavne karakteristike ovog procesa su niža temperatura sinterovanja, relativno brzo skupljanje i homogenizacija i velika gustina dobijenog materijala. Posebno interesantan pristup boljem razumevanju izuzetne složenosti ovog procesa, koja je posledica simultanog i sukcesivnog delovanja niza elementarnih mehanizama, predstavlja odredjivanje kvalitativnih i kvantitativnih efekata procesa primenom metoda modelovanja i simulacije. U tom smislu, u ovom radu je razvijen fizički i numerički model simulacije procesa difuzije i pomeranja granice medjupovršine tečno/čvrsto tokom sinterovanja u prisustvu tečne faze. Ovi modeli mogu biti deo složenog sistema za planiranje i projektovanje procesa, s obzirom da uvode nov način projektovanja procesa na osnovu postojećih teorijskih znanja, eksperimentalnih rezultata i rezultata modelovanja i simulacije procesa.