FRICTION COEFFICIENT OF CLUSTER DIAMOND-DISPERSED ALUMINUM COMPOSITE BY COMPRESSION SHEARING METHOD
作者单位：Dept. of Machine Intelligence and Systems Eng. Akita Prefectural UniversityYurihonjyo Akita 015-0055 JAPAN Dept.of Science and Mech.Eng. Chiba Inst. of Thech. NarashinoChiba 275-8588 JAPAN
会议日期：2006年
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
关 键 词：Cluster diamond Friction properties Compression shearing method
摘 要：正In this paper, pure Aluminum and cluster diamond-dispersed aluminum composites were made by the compression shearing method. The friction coefficient, density, mechanical properties, and microstructures of compacted powders were investigated. The addition of 1vol. % CD to Al improved the friction coefficient. The average friction coefficients of Al, 1 vol. % CD sample, and 5vol. % CD sample indicate 0.91, 0.71 and 0.83, respectively. Comparing with one of Al, these values are reduction of 22% and 9% , respectively. However, the 5vol % CD solidified by compression shearing method and dynamic compaction method shows an increase in friction coefficient. The pores can be observed at 5% CD sample. It is considered that the lubricating ability of the Al composite containing 5% CD decreases by the pores, consequently the friction coefficient is increased. In compression shearing, the oxidation layer formed on the Al powder surface was destroyed. However, the bonding of the powders was lower in hot press and dynamic compacting, since it was not possible to sufficiently destroy the oxidation layer. Therefore, the friction coefficient of composite material molded by compression shearing is lower than the one of composite material molded by hot press and dynamic compacting.