Thin-film forming of cluster diamond-dispersed aluminum composite by dynamic compaction

This paper reports on the thin-film forming of cluster diamond (graphite cluster diamond)-dispersed aluminum composite by the dynamic compaction method. The friction coefficient, density, mechanical properties, and microstructures of compacted powders were investigated. Stress wave control was also attempted in order to obtain high compacting stress due to the superposition of incident and reflected stress waves in the punches. Dynamic powder compaction was carried out at 300 to 873 K in a vacuum by the electromagnetic induction method. Density measurements showed that the compacted cluster diamond (graphite cluster diamond)-dispersed aluminum composite had a relative density of 0.98. The addition of cluster diamond (graphite cluster diamond) to the matrix systems used reduced the friction coefficient.