Investigation on the Interface Structure, Mechanical Properties, and Thermal Stability of TiAlSiN/TiAlN Multilayers

Abstract

Recently, the TiAlSiN/TiAlN coatings with excellent mechanical and thermal properties have great potential for protective applications that face deteriorated service environments. Here, we systematically investigate the interface structure, mechanical properties, and thermal stability of TiAlSiN/TiAlN multilayers with varied Al and Si contents of TiAlSiN sublayer. B o t h T i 0 . 5 3 A l 0 . 3 8 S i 0 . 0 9 N / T i 0 . 5 2 A l 0 . 4 8 N ( M L _ 1 ) a n d Ti 0.48 Al 0.38 Si 0.14 N/Ti 0.52 Al 0.48 N (ML_2) exhibit the face-centered cubic structure through epitaxial growth, whereas the Ti 0.43 Al 0.48 Si 0.09 N/Ti 0.52 Al 0.48 N (ML_3) shows a mixed cubic/ wurtzite (c/w) structure. This mechanism is explored by first-principles calculations that the increased content of Al and Si within the TiAlSiN sublayer is detrimental to the formation of a coherent interface. Meanwhile, the change of interfacial structure leads to a variation in hardness from ∼35.6 GPa of ML_1 to ∼35.4 GPa of ML_2 and then to ∼30.9 GPa of ML_3. In addition, ML_1 presents a delayed thermal decomposition by ∼100 °C, compared to those of ML_2 and ML_3 multilayers.

In Vitro Corrosion and Wear Investigation of Multifunctional TiAlMoN Sputtered Coatings on Cold-Sprayed SS316L

“…Magnetron sputtering is a highly recommended technique for depositing various industrial coatings. , It contributes to a wide application range, including wear-resistant, hard, corrosion-resistant, oxidation-resistant, and decorative coatings with specific optical or electrical properties. It is often used to improve the performance and extend the lifetime of different components such as cutting tools, aircraft fasteners, and proton exchange membrane fuel cells. − Transition metal nitride films have shown good corrosion resistance, high hardness, and excellent electrical conductivity. − Among them, titanium nitride is widely used in manufacturing cutting tools, orthopedic implants, stamping tools, and bearings and as a decorative material. , Many researchers have found that TiN coatings are usually characterized by high tribological performance during friction by forming a solid lubricant. − Therefore, combining TiN coatings with other elements (e.g., Al, Mo, Cr, etc.) presents a remarkable improvement in the hardness and wear resistance.…”