Investigation of Compaction and Sintering Features of High Porous Materials Produced with Different Pore Formers  Full text 

L. L. Roganov, N. A. Rudenko, L. V. Popivnenko

Donbass State Engineering Academy

UDC 621.762.4.043

Metall. Min. Ind.,  2011, Vol. 3, No. 7, pp.115-119

Abstract

The peculiarities of compaction and sintering of samples obtained from iron powder mixtures with different types of pore-formers (ammonium bicarbonate, sodium hydrocarbonate, sodium chloride) is contemplated. Compaction was performed unilaterally in a closed cylindrical matrix and sintering was carried out in reducing environment in a container with filling. Compression and ejection curves for the samples obtained from specified mixtures in the range of pressure 200-800 MPa were plotted. The influence of pore formers, used in the experiment, on the compaction mixtures of the system “iron – pore-former” is established. The dependencies of the changes in linear dimensions of sintered samples for specified values of compaction pressure within indicated range are built.

Keywords: HIGH-POROUS MATERIALS, COMPACTION PRESSURE, PORE-FORMERS, SHRINKAGE/GROWTH KINETICS