Study of dependency of cold spray deposition efficiency upon gas temperature and nozzle traverse speed

For the first time it is shown experimentally that the critical velocity of the nozzle movement (which is inversely proportional to the mass of the powder required for pre-activation of the substrate surface) depends upon the stagnation temperature of the accelerating gas. With an increase in the stagnation temperature, the mass of the powder spent for activation decreases, which leads to an increase in the critical velocity of the nozzle movement.