ELECTROCHEMICAL CR-NI-AL2O3 COMPOSITE COATINGS .2. MECHANICAL-PROPERTIES AND MORPHOLOGY

Surface morphology and some properties of Cr-Ni-Al2O3 electrodeposited composites, such as residual stresses, microhardness and wear resista nce were investigated. Two independent methods (X-ray technique and fl exible-cathode method) were applied for residual stress estimation. Al 2O3 particles served as sensors for X-ray measurements. Dependence of the residual stresses and wear rate on particle concentration and curr ent density was found, while microhardness was practically unaffected. The wear mechanism of the deposits is discussed in terms of residual stresses, adhesion and abrasive removal of worn material.