Influence of Coatings on the Durability and Friction of Clutch Systems in Motorsport

The article presents a comprehensive analysis of the influence of surface coatings and microtextures on the frictional characteristics and durability of clutch components in professional motorsport applications. The study is based on an interdisciplinary approach that integrates engineering tribology, materials science, and applied mechanics of high-load transmission systems. Particular attention is given to content and comparative analysis of both domestic and international sources describing the behavior of DLC coatings, PTFE-based composites, and iron-based laser claddings under various friction modes, thermal loads, and cyclic stresses. Critical differences between coatings are identified in terms of friction coefficient, wear volume, thermal stability, and adhesion strength to the substrate. Based on empirical data, a typology of coating applicability is proposed for different motorsport disciplines, ranging from circuit racing to rally and drag racing. Summary tables are presented to reflect the operational properties of coatings at temperatures up to 250 °C and under boundary lubrication conditions. The necessity of context-specific coating selection is substantiated, taking into account track configuration, weight constraints, and cooling requirements. Special emphasis is placed on the role of microtextures in heat distribution and contact stress regulation within the clutch. This article will be of interest to design engineers, motorsport specialists, friction system developers, and surface engineering researchers involved in the design of transmission components for extreme operating conditions.