J. Mater. Sci. Technol. ›› 2020, Vol. 54: 211-222.DOI: 10.1016/j.jmst.2020.02.072

• Research Article • Previous Articles     Next Articles

Microstructure and cavitation erosion behavior of sputtered NiCrAlTi coatings with and without N incorporations

Zhengliang Liua,b, Shenglong Zhub,*(), Mingli Shenb,*(), Yixuan Jiaa,b, Wen Wangb, Fuhui Wangc   

  1. a School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230000, China
    b Corrosion and Protection Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2019-11-11 Revised:2020-02-19 Accepted:2020-02-27 Published:2020-10-01 Online:2020-10-21
  • Contact: Shenglong Zhu,Mingli Shen

Abstract:

The NiCrAlTi coatings free of N and with N incorporations were deposited on austenitic stainless steel 304L by magnetron sputtering in Ar and in gas mixture of Ar and N2, respectively. The N incorporated in the coatings existed as nitride precipitates (from ~3 vol.% to ~17 vol.%) after vacuum annealing. All the NiCrAlTi coatings, whatever free of N or with N incorporations, exhibited better resistance against cavitation erosion than ion plating TiN coating and the substrate 304 L in ultrasonic cavitation tests. The NiCrAlTi coating free of N incorporation presents superior cavitation erosion resistance. However, the nitrogen incorporation within the NiCrAlTi coatings showed negative effects on the resistance against cavitation erosion.

Key words: Cavitation erosion, NiCrAlTi(N) coating, Microstructure, Nitride precipitate