Resistance to wear is the material's ability to withstand mechanical fatigue. It very often determines the operating life of the part. Ceramics with very high hardness generally have very good resistance to wear. There are, however, many different wear situations (friction, spraying an abrasive material, shock, etc.), and it is therefore necessary to identify the most suitable materials for each situation, which requires a combination of very high hardness and tenacity. For example, components subject to friction, such as thread guides, nozzles, anti-wear coatings in the conveyance of abrasive products, etc. are generally made from alumina or ZTA, while grinding beads and certain mechanical tools are generally made from zirconia, ATZ, or even silicon carbide or silicon nitride.