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High temperature frictional wear behaviors of nano-particle reinforced NiCoCrAlY cladded coatings

Authors
Journal
Transactions of Nonferrous Metals Society of China
1003-6326
Publisher
Elsevier
Publication Date
Volume
21
Issue
6
Identifiers
DOI: 10.1016/s1003-6326(11)60860-1
Keywords
  • Functional Materials

Abstract

Abstract The NiCoCrAlY coatings strengthened by three nano-particles with the same addition were prepared on a Ni-base super alloy using laser cladding technique. The dry frictional wear behaviors of the coatings at 500 °C in static air were investigated. The comparison was made with the coating without nano-particles. The results show that the wear mechanism of the NiCoCrAlY coatings with nano-particles, like the coating without nano-particles, is the delamination wear due to the strong plastic deformation and oxidative wear. However, the frictional coefficient of the coatings increases and presents the decrease trend with the increase of sliding distance after adding nano-particles. Moreover, the wear rate of the coatings with nano-particles is only 34.0%-64.5% of the coating without nano-particles. Among the three nano-particles, the improvement of nano-SiC on the high temperature wear resistance of the coating is the most significant.

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