The Doctoral Thesis “Creation of nanostructured wear resistant ion-plasma coatings for restoration and protection of machine parts” has been developed by Margarita Urbaha for obtaining the Doctor’s Degree in Engineering Sciences. Scientific adviser Dr. habil. sc. eng., Professor Jurijs Martinovs. The analysis of different methods of increasing wear resistance (constructive, technological or maintenance) shows that the most perspective method is related to the improvement of part surface properties by creating special protective coatings. Innovative nanostructured coatings, which are created on the basis of ion-plasma sputtering technologies, are of special interest. Coatings of this type differ by technological effectiveness and a wide range of physico-mechanical and service properties including, for example, wear resistance, corrosion resistance etc. The work offers a theoretical model that justifies the effectiveness of applying the combined method of depositing nanostructured multicomponent ion-plasma coatings in order to provide them with optimum service properties and to intensify the technological process of deposition. The methodology for determining an objectionable level as well as the risk value related to its choice in the process of testing tribo-elements with coatings was theoretically justified. The experimental investigation of the technological processes for obtaining ion-plasma coatings by using different methods of material sputtering (condensation by ion bombardment as well as magnetron) was carried out. The advantages and disadvantages of the methods of coating sputtering were demonstrated experimentally. There was developed a new high-performance ion-plasma technology for obtaining a nanostructured wear-resistant composite coating by the combined method. Was developed a prototype of nanostructured composite coating (two-layer, three-component) on Ti–Al–N basis with increased wear-resistance. The experimental investigation of the quality characteristics of created nanostructured coating (physico-mechanical properties, structure, chemical composition and geometry (thickness, two-dimensional (2D) and three-dimensional (3D) parameters of surface roughness)) was carried out. The failure mechanism of created wear-resistant nanostructured coating was experimental investigated and the assessment of its adhesion strength was performed. On the basis of the results of nano-indentation, the assessment of the wear resistance of created nanostructured coating was performed. The assessment of influence of the process-dependent parameters of coating sputtering process (correlation of working gases in sputtering chamber) and service properties (coating roughness) upon the friction coefficient was performed. The Doctoral Thesis is written in Latvian, it consists of introduction, five chapters, resume, references and 22 appendixes. The bibliography includes 86 sources. Doctoral Thesis contains 65 figures and 15tables. The total volume is 173 pages.