1144 Fe、 Al およびミルスケール粉末の MA により作製した FeAl 基 ODS 材料の特性

概要

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Powder mixture of Fe, Al and mill scale Fe power (24.5mass%O) was milled for certain period. Composition of powder mixtures were Fe-40mol%Al+0,2.5,5.0,7.5,10.0 vol% Al_2O_3 after mechanochemical reaction. Longer time milling over 1080ks, FeAl phase was formed only by MA. Al acts as a reducing agent for Fe oxide (mill scale powder) and then synthesizes Al_2O_3. The mill scale powder affected the MA process and phase formation behavior. Almost full density compacts were obtained by vacuum hot pressing under the condition of 1273K-150MPa-7.2ks, and those become FeAl intermetallic compound. Compacts, made with adding high weight percent of mill scale powder, showed higher hardness compared with the FeAl monolithic VHPed compact. This is presumably resulting from the effect of dispersed Al_2O_3 introduced by mechanochemical reaction during MA and later consolidation process.
一般社団法人日本機械学会の論文
2003-08-05