New method for preparing composite containing nanometre diamond particles

Different powder mixing methods were used to prepare Al - 5Cu and Cu - 10Sn (wt-%) based composites containing nanometre diamond. A new method for obt aining ultrafine Cu, Sn particles and a good distribution of nanometre diam ond aggregates was developed. The nanometre diamond aggregates were well di spersed in the Cu-10Sn matrix. However, the distribution of nanometre diamo nd in the Al - 5Cu based composite was unacceptable. Owing to the dispersio n of nanometre diamond, Cu - 10Sn based composite possessed higher hardness and lower bend strength than Cu - 10Sn alloy.