Detonation spraying of copper pretreated with high-energy impacts

Copper powder spraying is under study: the PMS-1 original copper, the copper that is mechanically treated in a high-energy planetary mill, and the copper that is also spheroidized in a plasma jet. High-density copper coatings are obtained using a CCDS2000 detonation complex. The microhardness of coatings $\mathrm{HV}_{0.1}$, obtained from original and mechanically treated copper powders, increases from $110$ to $160$ and from $150$ to $185$, respectively, and the microhardness of coatings from the spheroidized powder is $\mathrm{HV}_{0.1}=165$. An X-ray phase analysis is carried out, and the resulting data indicate that, during the spraying, the copper oxide is partially reduced.