Preparation and Oxidation Properties of HVOF Sprayed NiCoCrAlY/Al2O3-10%B4C Coatings

CAO Yu-xia, SUN Jing-wei, ZHOU Hai-jing, HUANG Yan, HAO Bin

Surface Technology ›› 2023, Vol. 52 ›› Issue (5) : 413-419.

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Surface Technology ›› 2023, Vol. 52 ›› Issue (5) : 413-419. DOI: 10.16490/j.cnki.issn.1001-3660.2023.05.041

Preparation and Oxidation Properties of HVOF Sprayed NiCoCrAlY/Al2O3-10%B4C Coatings

  • CAO Yu-xia1, HAO Bin1, SUN Jing-wei2, ZHOU Hai-jing3, HUANG Yan3
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Abstract

Brush seal system was used on high-pressure compressors and turbine blades in advanced turbo-engines. The solid lubricating and wear-resistant coatings prepared on turbo-engines by thermal spraying technology would not only reduce the wear rates of the rotor shafts and brushes, but also satisfy the harsh service environment need for the brush seal parts. This is an advanced NiCoCrAlY/Al2O3-10%B4C high temperature solid lubrication wear resistant coating used in brush seal parts of turbo-engines. The work aims to improve its oxidation resistance property.

Key words

HVOF; NiCoCrAlY/Al2O3-B4C coatings; microstructure; oxidation; nickel base superalloy; coated

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CAO Yu-xia, SUN Jing-wei, ZHOU Hai-jing, HUANG Yan, HAO Bin. Preparation and Oxidation Properties of HVOF Sprayed NiCoCrAlY/Al2O3-10%B4C Coatings[J]. Surface Technology. 2023, 52(5): 413-419
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