Plasma-Sprayed Al Alloy Coating with Enhanced Lamellar Bonding Through Novel Self-Bonding Strategy

Plasma spraying was employed to deposit an Al coating in order to create a self-metallurgical bonding effect through impact-induced melting with highly overheated molten droplets. Numerical simulation was employed to estimate the interface temperature between the molten Al splat and the Al substrate...

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Bibliographic Details
Published in:JOM (1989) 2020-12, Vol.72 (12), p.4604-4612
Main Authors: Rashid, Haroon, Dong, Xin-Yuan, Wang, Jun, Liao, Xian-Jin, Wei, Ying-Kang, Luo, Xiao-Tao, Li, Chang-Jiu
Format: Article
Language:English
Subjects:
Alloys
Aluminum coatings
Aqueous solutions
Bonding
Chemistry/Food Science
Cold
Corrosion resistance
Droplets
Earth Sciences
Engineering
Environment
Interfaces
Investigations
Melting
Metallurgy
Physics
Plasma
Plasma spraying
Substrates
Surface Engineering: Applications for Advanced Manufacturing
Temperature
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Summary:Plasma spraying was employed to deposit an Al coating in order to create a self-metallurgical bonding effect through impact-induced melting with highly overheated molten droplets. Numerical simulation was employed to estimate the interface temperature between the molten Al splat and the Al substrate. The interface bonding was examined from cross sections of the Al splat and the etched coatings. The results show that, with Al droplets higher than 1800°C, impact-induced Al substrate melting occurs. The measurements showed that, during spraying, most Al particles were heated to temperatures theoretically causing an impact-induced melting effect, which subsequently produces a metallurgical self-bonding effect. The observed results confirm the metallurgical bonding in plasma-sprayed Al coating.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-020-04394-z