Deposition of Self-Lubricating Coatings via Supersonic Laser Deposition (SLD)

Authors
Soane, N 
Sparkes, M 
O’neill, W 

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Article
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Abstract

jats:pThis paper describes the use of Supersonic Laser Deposition (SLD) to manufacture nickel/graphite composite coatings on titanium and aluminium substrates. Laser heating is critical for depositing coatings containing up to 13.3 vol% graphite. For a given feedstock composition, the resulting graphite content and average size of the graphite particles retained in the coating increases with laser power, until substrate melting occurs. The effect of the powder type, feedstock composition, and process conditions on coating structure is characterized. The friction and wear behaviour of selected coating compositions is examined. Nickel coatings containing 13.3 vol% graphite demonstrated self-lubricating behaviour with a stable coefficient of friction below 0.14 in pin-on-disc testing.</jats:p>

Publication Date
2022
Online Publication Date
2022-06-01
Acceptance Date
2022-05-28
Keywords
Supersonic Laser Deposition, solid lubricant, metallic coating, nickel-coated graphite, pin-on-disc testing
Journal Title
Coatings
Journal ISSN
2079-6412
2079-6412
Volume Title
Publisher
MDPI AG
Sponsorship
Engineering and Physical Sciences Research Council (EP/L016567/1)