Fe_3AlC_<0.5>炭化物をin situ分散させたFeAl複合材料の特性(S18-2 粉末成形とその評価(2),S18 粉末成形とその評価)

概要

論文の詳細を見る
FeAl matrix composites, containing Fe_3AlC_<0.5>, have been prepared by mechanical alloying (MA) and consolidation using vacuum hot pressing (VHP). The materials obtained here are "in situ composite", because the dispersoid, and also matrix, have been formed during MA and consolidation process from elemental starting material, Fe, Al and C powder. The present study examined the effects of precipitation on the mechanochemical reaction, densification behavior and characteristics of consolidated compacts. Powder mixture of Fe, Al and C powder mixture was milled to form matrix having the composition of Fe-40mol%Al and 10vol% fraction of precipitation, Fe_3AlC_<0.5>. Density of the FeAl+ Fe_3AlC composition MA powder began to increase at 690K. It was much lower than the case of FeAl+Al_2O_3 composition MA powder, 1125K. Micro-hardness of the FeAl+Fe_3AlC and Fe_3AlC were HV524 and HV646, respectively.
2004-09-04