Aluminium alloys are a material that is increasingly used in industry. This is due to very good strength properties with low specific weight and low production costs. The disadvantage of kinematic system aluminium elements is their surface’s susceptibility to adhesive wear. One method of eliminating the adverse impact of adhesive tacks on the surfaces of cooperating aluminium components of machinery is the application of the method based on the anodic oxidation of alloys surface. The layers obtained by this method are widely used in sliding connections of kinematic machine parts. The modification of anodic oxide layers with admixtures has been an uninterrupted area of interest since the 1990s. This article is a review of selected methods of modifying the structure and properties of aluminium oxide layers on aluminium alloys.

This paper presents the results of investigations of the ceramic samples of perovskite type solid solution (Pb_1-xLa_x)(Zr_1-yTi_y)O₃ (PLZT—with x = 0.02, 0.03, 0.06 and 0.10, y = 0.9). Ceramic samples have been obtained from oxides using classical ceramic technology. The main aim of this paper is to compare the energy storage densities calculated from the P-E loops (at frequency of 1Hz) obtained as a result of integrating the area enclosed by E-P curve for tree types of ceramics—ferroelectric (PLZT with x = 0.02), slim-loop antiferroelectric (PLZT with x = 0.6, 0.10) and normal antiferroelectric with double loops (PLZT with x = 0.03).

With the aim of proposing new materials with good properties for dry sliding contact, aluminium oxide layers Al

This paper presents methods of modifying the anode surface layers of Al₂O₃ by introducing carbon to their microstructure. Composite coatings were prepared using two different methods. In the first, coatings were formed by means of oxidation under constant current conditions. Anodic oxidation of aluminium was conducted in a multicomponent electrolyte with the addition of organic acids and graphite. The second method was based on the formation of oxide coatings in an electrolyte without the addition of graphite or heat treatment of the layers of succinic acid. The obtained coatings were tested using SEM, TEM, and GDOES (glow discharge optical emission spectrometry) and their tribological and stereometric properties were measured. The study demonstrated the beneficial effects of the methods when used to improve the tribological properties of sliding couples.