Oxides in general, by reason of their chemical inertia in oxidising atmospheres, high melting point and high mechanical strength, afford a suitable protective coating at high temperatures. Aluminium oxide in particular also has good thermal shock resistance, good impact resistance at high temperatures, and moderate self‐sealing properties. Hitherto it has been applied to turbojets, space components and rocket jets by flame spraying or arc plasma spraying. Since the characteristic properties of the coating, and hence its efficiency, are directly associated with its degree of structural perfection, the application technique has great importance; in this sense it may be thought, that chemical vapour deposition, allowing the ‘construction’ of the coating atom by atom or molecule by molecule, could produce a material having chemical and physical properties close to the theoretical. For this and other reasons the authors have already had the idea of studying the possible application of this technique for the preparation of a coating of aluminium oxide.
CitationDownload as .RIS
MCB UP Ltd
Copyright © 1968, MCB UP Limited