Effect of Stoichiometry in Mo-Based Ordered Double Transition Metal Carbide MXenes on Solid Lubrication and Tribo-Film Formation

MXenes have emerged as promising solid lubricants due to their layered structure, tunable chemistry, and ability to form mechanically robust, wear-resistant tribo-films. However, most studies have focused on single-metal MXenes such as Ti3C2Tx, Ti3CNTx, or V2CTx, leaving multimetal MXenes largely unexplored. Here, we present a comprehensive tribological and mechanochemical evaluation of ordered double-transition metal Mo2TiC2Tx and Mo2Ti2C3Tx coatings under dry sliding in ambient conditions. Using nanoindentation mapping, X-ray photoelectron spectroscopy, Raman spectroscopy, and electron microscopy, we demonstrate that Mo2Ti2C3Tx tends to form dense, chemically stabilized, and mechanically robust tribo-layers…

• AN
  Agencia Nacional de Investigación y Desarrollo

  Awards: NCN_2023_07, EQM190057
• DO
  Division of Chemistry

  Award: CHE-2318105
• FN
  Fondo Nacional de Desarrollo Científico y Tecnológico

  Awards: 1191779, 13240066, 3220165, 1220331