Structures and properties of vacuum vapor deposited coatings on steel substrates

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Abstract
An examination was made of the influence of some deposition parameters on coating structures and properties. The evaporated metals were aluminum and zinc. The deposition parameters were deposition rate and substrate temperature and roughness. The examined coating properties were appearance, adhesion, grain size, porosity, texture, and structure. The coatings were applied on steel sheets and wire pieces in a discontinuous way, and on wire in a continuous air-to-air installation. In testing the zinc coatings, the influence of both, the substrate temperature and the deposition rate on coating grain size and porosity, was most evident. Also the influence of the deposition rate on the re-evaporation temperature of the substrate was examined. During the examination of the aluminum coatings, an important influence of deposition rate and substrate temperature on structure, grain size, texture, and condensation mechanism was established.

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