Study of a New Method to Fabricate W–Cu Composites

Abstract

W-Cu composites were prepared by a method of combustion synthesis and melt-infiltration in an ultrahigh-gravity field. The effects of the ultrahigh-gravity factor, quantity of W powder bed and W particle size on the properties of the prepared W-Cu composites were investigated. The microhardness and thermal expansion coefficient increased with the increase of the ultrahigh-gravity factor, as the enhanced ultrahigh-gravity field resulted in higher cooling rate and subsequently the formation of more defects (e.g., dislocations). The microhardness and bending strength of the samples decreased with the increase of the W powder bed quantity. In addition, The W-Cu samples produced with fine W powders showed higher quality than those prepared by coarse W powders.

An improved compocasting technique for uniformly dispersed multi-walled carbon nanotube in AA2219 alloy melt

“…Bulk material processing with low cost by liquid processing requires more attention. Researchers have put the effort in various casting routes [3][4][5][6][7][8][9][10][11][12][13][14][15], but limited literature is available for aluminium (Al) -MWCNT composites by casting. Mansoor et al [16], reported an instantaneous enhancement in tensile strength (52%), yield strength (77%), hardness (45%) and ductility (44%) on 0.2vol.% MWCNT reinforced aluminum composite, which is produced by induction melting.…”