Effects of aluminum phosphate sealant containing Al2O3 nanoparticles on the hardness and wear resistance of the Al2O3-TiO2 plasma sprayed coating

Authors

  • Pham Thi Ha Institute for Tropical Technology, VAST,18, Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Pham Thi Ly Institute for Tropical Technology, VAST,18, Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Nguyen Van Tuan Institute for Tropical Technology, VAST,18, Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Vo An Quan Institute for Tropical Technology, VAST,18, Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Le Thu Quy National Key Laboratory for Welding and Surface Treatment Technologies, NARIME 4 Pham Van Dong, Cau Giay, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/55/6/9026

Keywords:

Al2O3-TiO2 coatings, aluminum phosphate, plasma spraying, Al2O3 nanoparticles

Abstract

In the present study, Al2O3-40% TiO2 composite coatings were fabricated on CT3 steel substrate by plasma spraying technique. The coatings were sealed with aluminum phosphate solution contained 5 wt.% Al2O3 nanoparticles and then heat treated at 400oC. The permeability of aluminum phosphate solution, phase composition, structure morphology, microhardness and wear resistance of the coating were studied. The study results phase composition of the coatings showed that the coatings were composed γ-Al2O3 and Al2TiO5 phase. The compounds AlPO4 and Al(PO3)3 were found in the coating sealed with aluminum phosphate. The presence of Al2O3 nanoparticles was increased the permeability of the aluminum phosphate solution into the coating. The coatings sealed  with aluminum phosphate contained Al2O3 nanoparticles have lower density, higher hardness and wear resistance higher than the coating sealed with aluminum phosphate uncontain Al2O3 nanoparticles and the unsealed coating.

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Published

11-12-2017

How to Cite

[1]
P. T. Ha, P. T. Ly, N. V. Tuan, V. A. Quan, and L. T. Quy, “Effects of aluminum phosphate sealant containing Al2O3 nanoparticles on the hardness and wear resistance of the Al2O3-TiO2 plasma sprayed coating”, Vietnam J. Sci. Technol., vol. 55, no. 6, pp. 698–705, Dec. 2017.

Issue

Section

Materials

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