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RF magnetron sputtered Nb–V–N composite coatings for high-temperature self-lubricant applications
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Orientador(es)
Resumo(s)
Enhancing the tribological properties of hard ceramic coatings for high temperature applications is one of the hot topics in the solid lubricant field. In this paper, a series of Nb–V–N coatings with different V concentrations were deposited using RF magnetron sputtering system, and the crystalline structure, mechanical and tribological properties were investigated. Results showed that the Nb–V–N coatings regardless of V concentrations exhibited two phase fcc-NbN with V in solid solution and hcp-NbN phase. The hardness and elastic modulus of the coatings were enhanced by adding 5.3 at.% of V. The room temperature tribological properties of the coatings were improved by the addition of V well due to the enhanced mechanical properties and the nature excellent self-lubricant characteristics. The evaluation of main tribophase from the wear track at elevated temperatures from the self-lubricant V2O3 at 400 °C to the V2O5 at 800 °C, contributed to the stable and excellent anti-frictional properties of the coating with a V concentration of 12.4 at.%. However, the wear rate of the coatings drops gradually with the increase of V concentrations due to the large amount of soft but lubricant tribophases at elevated temperatures.
Descrição
Palavras-chave
RF magnetron sputtering Nb-V-N coatings Mechanical properties Tribological properties
Contexto Educativo
Citação
Moussa Athmani, FanLin Kong, Hongbo Ju, Jing Luan, Chengke Zhang, Bingyang Ma, Albano Cavaleiro, Filipe Fernandes, RF magnetron sputtered Nb–V–N composite coatings for high-temperature self-lubricant applications, Vacuum, Volume 219, Part A, 2024, 112657, ISSN 0042-207X, https://doi.org/10.1016/j.vacuum.2023.112657.
Editora
Elsevier