Preparation and tribological behaviors of plasma sprayed NiAl-Cu/graphite nanosheets composite coating

Graphite nanosheets (GNs) is an outstanding nanofiller in composite coatings. However, it is difficult to use in plasma spray because it is too light to be mixed with spraying powders. This paper aims to report on a Cu/GNs composite powder synthesized by the ascorbic acid reduction method and its ap...

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Bibliographic Details
Published in:Tribology international 2022-03, Vol.167, p.107360, Article 107360
Main Authors: Yanhan, Feng, Jianhua, Fang, Ping, Liu, Kecheng, Gu, Shuang, Su, Jiang, Wu, Zeqi, Jiang
Format: Article
Language:English
Subjects:
Ascorbic acid
Coating
Coefficient of friction
Copper
Friction reduction
Graphite
Graphite nanosheets
Intermetallic compounds
Nanosheets
Nickel aluminides
Nickel base alloys
Nickel compounds
Plasma spray
Plasma spraying
Powder spraying
Tribological behavior
Tribology
Wear rate
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Summary:Graphite nanosheets (GNs) is an outstanding nanofiller in composite coatings. However, it is difficult to use in plasma spray because it is too light to be mixed with spraying powders. This paper aims to report on a Cu/GNs composite powder synthesized by the ascorbic acid reduction method and its application on plasma spraying. Scanning electron microscopy revealed the anchoring of the copper particles on the GNs, and thus the composite powder could be uniformly mixed with NiAl spraying powder. Reciprocating tribological tests exhibited a 13.8% and 17.2% reduction for the friction coefficient and wear rate of the composite coating. A GNs contained transfer layer was discovered at the wear scar, which was considered as the anti-friction and anti-wear layer. [Display omitted] •Graphite nanosheets load copper particles (Cu/GNs) composite powder is synthesized•Cu/GNs powder is applied on plasma spray to manufacture GNs-metal composite coating•Tribological properties of the composite coating is obviously improved
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2021.107360