Cold Spray additive manufacturing of Al/diamond composites using core-shell-structured diamond
Cold Spray additive manufacturing of Al/diamond composites using core-shell-structured diamond
In this work, advanced Al/diamond wear-resistance composites were fabricated by solid-state cold spray additive manufacturing using core-shell-structured diamond powders. Based on the experimental results and thorough discussion, it is found that core-shell-structured diamond powders were much easier to deposit than pure Al by cold spray over single layer tracks, showing great potentials as feedstock for cold spraying. The deposition mechanism of the Al/diamond composites were dominated by the true metallic bonding between Al matrix and Cu layer, which is different from other more conventional cold sprayed metal matrix composites. Tensile tests indicated that the tensile strength of the Al/diamond composites can be higher than cold sprayed pure Al. In addition, the Al/diamond composites were shown to have an excellent wear-resistance performance. Wear rate reduced by by 17.8 times for N4-1 composite and 37.5 times for N1-1 composite as compared with cold sprayed Al/Al2O3.