The principles of a new class of materials with an artificial inhomogeneity have been developed and their fabrication methods have been studied, The theoretical basis of these functional gradient materials (FGMs), their three-dimensional structure and properties evaluation, and experimental powder metallurgy techniques of their processing, based of melt infiltration in combination with chemical liquid deposition and microgravity forming, have been investigated.
The W-Cu-Ag-Cr-Diamond, WC-Co, ceramics (Si3N4, SiC) - metal (Cu, Al) systems were studied for FGM components manufacturing. The behaviour of materials during infiltration has been examined with a laboratory scale high temperature thermal balance. The apparatus and theoretical background for the description of a measured signal (apparent thermogravimetry technique) have been adapted to simulate the condition of the process for different FGM systems by infiltration. The structure and properties of FGMs were evaluated with the micromechanical model developed, and special software was designed for that.
The results of the present study are part of the COST 503/III project - ''Powder based gradient materials and components'', supported by the Commission of the European Communities (DG-XII, Joint Research Centre).
|Publication status||Published - 1995|
|MoE publication type||G4 Doctoral dissertation (monograph)|
- GRADIENT MATERIALS
- POWDER METALLURGY
- HARD MATERIALS
- COMPUTER SIMULATION