Abstract
In this paper, application of metal injection molding to FeAl intermetallic compounds and the properties of sintered FeAl compacts were described. The powder material was pre-alloyed powder(Fe-40at% Al) manufactured by SHS process, which had average particle size of 4.0μm. Consolidation process by sintering, microstructure and mechanical properties of sintered compacts were investigated. The results obtained in this study were summarized as follows:
(1) Relative density of the compact sintered at 1523K for 7.2ksec in vacuum(10°Pa order) was 94%. At this sintered condition, apparent porosity was almost zero. Raising sintering temperature to 1548K, relative density was improved to 99%.
(2) The sintered compact had the microstructure in which fine particles considered as aluminium oxide were dispersed in the matrix of single phase of B2(FeAl).
(3) The compact sintered at 1523K for 7.2ksec gave 0.2% proof stress of 340MPa, tensile strength of 630MPa and elongation of 3.4% at room temperature.
