日本金属学会誌

J. Japan Inst. Metals, Vol. 57, No. 1 (1993),
pp. 88-95

Sand-Erosion Behavior of Al--CuAl2 Lamellar Eutectic Alloys

Setsuo Aso, Tatsumi Shida, Michihiro Tagami and Shoji Goto

Department of Materials Engineering and Applied Chemistry, Mining College, Akita University, Akita

Abstract:

The sand-erosion mechanism of wear-resistant materials having a composite structure was investigated on lamellar-eutectic Al--CuAl2 composites with different interlamellar spacings, prepared by unidirectional and metal-mold solidification methods. The interlamellar spacing was controlled from 0.5 to 2.1 μm. The single α phase and the single θ phase materials were also prepared. Sand-erosion test was carried out in a mixture of sand and water.
It was found that the erosion rate of the lamellar-eutectic composites rapidly decreased with decreasing interlamellar spacing in the smaller interlamellar spacing region, while the dependence of erosion rate on the interlamellar spacing was not detected in the larger interlamellar spaing region. Such a tendency was pronounced in the metal-mold solidification composites having fine structures. The erosion rate of lamellar-eutectic composites was always lower than that estimated from ``the rule of mixtures''. These facts were discussed in term of shielding effect of hard θ lamellae from the attack of soft α phase.


(Received June 3, 1992)

Keywords:

aluminum--copper eutectic alloy, composite material, lamellar eutectic, sand-erosion, erosion rate


PDF(Free)PDF (Free)     Table of ContentsTable of Contents

Please do not copy without permission.