TiO<SUB>2</SUB>とAlとの反応スクイズキャストによる金属間化合物分散基複合材料の調整

概要

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The discontinuous ceramic fiber reinforced aluminum alloy composites have been put into practical use, such as the piston and cylinder liner for automobile engines, the vane for rotary compressor and so on. However, they are requested to improve the high temperature strength over 200t and the wear resistivity. One of authers proposed reaction squeeze casting process to introduce intermatallic compounds into matrix aluminum by utilizing positively the reaction between fibers and molten aluminum. The reaction squeeze casting using the anatase type of TiO2 with molten aluminum showed that the mixed structure with very high hardness of α-Al2O3, TiAl and TiAl3 was formed, but it was not a homogenous microstructure. In the present paper, the reaction squeeze casting using the rutile type of TiO<SUB>2</SUB> with molten aluminum was carting out to prepare the intermetallic compounds distributed matrix composites. The process temperatures and the hardness of composites with intermetallics are discussed.
社団法人粉体粉末冶金協会の論文