Advances in the development of detonation technologies and equipment for coating deposition

New devices and methods for the plasma detonation deposition of coatings, which give a permanent delivery of gases and powders into the combustion chamber, have been developed. They allow one to increase the delivery accuracy and to promote an operation frequency of 2–20 Hz for these detonation devices. Non-stationary regimes of the detonation combustion of a combustible gaseous mixture are found allowing the introduction of an additional electrical energy and the control of the pulsed jet characteristics, as well as the ability to change the jet power density from 10 3 to 10 7 W cm −2, the jet temperature from 2×10 3 to 3×10 4 K and its velocity from 600 to 8000 m s −1. A new type of device has been developed. Using this device coatings from α-Al 2O 3 and hard alloy WC(88%)–Co(12%) powders have been produced. Analysis has demonstrated that these coatings are of better quality than those deposited using traditional gas-detonation technology.