Improvement of interfacial bonding between plasma-sprayed cast iron splat and aluminum substrate through preheating substrate

Xing, Ya-Zhe, Liu, Zhang, Wang, Gui, Li, Xing-Hang, Jiang, Chao-Ping, Chen, Yong-Nan, Zhang, Yong, Song, Xu-Ding and Dargusch, Matthew (2017) Improvement of interfacial bonding between plasma-sprayed cast iron splat and aluminum substrate through preheating substrate. Surface and Coatings Technology, 316 190-198. doi:10.1016/j.surfcoat.2017.03.032


Author Xing, Ya-Zhe
Liu, Zhang
Wang, Gui
Li, Xing-Hang
Jiang, Chao-Ping
Chen, Yong-Nan
Zhang, Yong
Song, Xu-Ding
Dargusch, Matthew
Title Improvement of interfacial bonding between plasma-sprayed cast iron splat and aluminum substrate through preheating substrate
Journal name Surface and Coatings Technology   Check publisher's open access policy
ISSN 0257-8972
1879-3347
Publication date 2017-04-25
Sub-type Article (original research)
DOI 10.1016/j.surfcoat.2017.03.032
Open Access Status Not yet assessed
Volume 316
Start page 190
End page 198
Total pages 9
Place of publication Lausanne, Switzerland
Publisher Elsevier S.A.
Collection year 2018
Language eng
Abstract During the plasma spraying process, the splat-substrate interaction is a key factor to understanding the formation of the coating-substrate adhesion. In the present study, both experimental and simulation methods were employed to analyse the splat-substrate interfacial bond and its formation. Individual cast iron splats were sprayed onto polished aluminum substrate surfaces, which were preheated to temperatures ranging from 25 °C to 240 °C. After spraying, polished cross sections of the collected splats were examined by scanning electron microscopy to identify the splat-substrate interface bonding characteristics. Furthermore, numerical simulation was conducted using a finite element method (FEM) to obtain quantitative information on heat exchange between the splat and the substrate. Results showed that the substrate preheating temperature (initial substrate temperature) significantly affected the splat-substrate bond formation. When the initial substrate temperature exceeded 190 °C, the formation of a metallurgical bond at the splat-substrate interface was detected. The results of the analysis based on both experimental and simulation data, demonstrated that the higher initial substrate temperature caused obvious plastic deformation of the substrate surface and atomic diffusion at the splat-substrate interface under the present conditions, which contributed to the formation of the metallurgical bond. Moreover, a barb-shaped structure was found at the periphery of the splat when the initial substrate temperature reached 240 °C, which was beneficial to the enhancement of the mechanical bonding between the splat and the substrate.
Keyword Bonding
Cast iron
Interface
Plasma spraying
Substrate temperature
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
HERDC Pre-Audit
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Tue, 11 Apr 2017, 00:25:16 EST by Web Cron on behalf of Learning and Research Services (UQ Library)