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Current Progress in Solution Precursor Plasma Spraying of Cermets: A Review

1
Physics Department, College of Science and Mathematics, MSU-Iligan Institute of Technology, Iligan City 9200, Philippines
2
IRCER UMR 7315 CNRS, University of Limoges, Limoges Cedex 87068, France
*
Author to whom correspondence should be addressed.
Metals 2018, 8(6), 420; https://doi.org/10.3390/met8060420
Received: 1 May 2018 / Revised: 16 May 2018 / Accepted: 1 June 2018 / Published: 4 June 2018
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Abstract

Ceramic and metal composites, known also as cermets, may considerably improve many material properties with regards to that of initial components. Hence, cermets are frequently applied in many technological fields. Among many processes which can be employed for cermet manufacturing, thermal spraying is one of the most frequently used. Conventional plasma spraying of powders is a popular and cost-effective manufacturing process. One of its most recent innovations, called solution precursor plasma spraying (SPPS), is an emerging coating deposition method which uses homogeneously mixed solution precursors as a feedstock. The technique enables a single-step deposition avoiding the powder preparation procedures. The nanostructured coatings developed by SPPS increasingly find a place in the field of surface engineering. The present review shows the recent progress in the fabrication of cermets using SPPS. The influence of starting solution precursors, such as their chemistry, concentration, and solvents used, to the micro-structural characteristics of cermet coatings is discussed. The effect of the operational plasma spray process parameters such as solution injection mode to the deposition process and coatings’ microstructure is also presented. Moreover, the advantages of the SPPS process and its drawbacks compared to the conventional powder plasma spraying process are discussed. Finally, some applications of SPPS cermet coatings are presented to understand the potential of the process. View Full-Text
Keywords: cermets; cermet applications; solution precursor plasma spraying; microstructure cermets; cermet applications; solution precursor plasma spraying; microstructure
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Unabia, R.; Candidato, R., Jr.; Pawłowski, L. Current Progress in Solution Precursor Plasma Spraying of Cermets: A Review. Metals 2018, 8, 420.

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