Abstract
Abstract This investigation envisages the preparation of diamond reinforced bronze and Mo powders as thermal spray feedstock via ball milling route. The metal powders with 10 wt.% micro-sized mono-crystalline diamond have been ball milled for up to 48 h. The powders have been characterised to get their crystal structure and stability of diamond using XRD and Raman spectroscopy. Substantial peak broadening of both powders has been observed, indicating a reduction in crystallite size. The bronze powder has turned flaky and shown cold welding of flakes. The Mo powder, on the other hand, exhibited brittle characteristics. Raman spectrum of the bronze-diamond powder indicates some changes in the sp 3 hybridised structure while the D-band has been protected. The Mo-diamond powder retained the sharp D-band up to 42 h of ball milling. After 48 h of milling, a substantial decrease in the intensity of D-band and a significant growth of G-band has been observed for this powder.
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