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Open AccessArticle

Property of TiO2-15MgAl2O4 Electrical-Heating Coating Prepared by Atmospheric Plasma Spraying and Hydrogen Heat Treatment

1
School of Materials Science and Engineering, Central South University, Changsha 410083, China
2
Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangzhou 510650, China
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(2), 177; https://doi.org/10.3390/coatings10020177
Received: 18 December 2019 / Revised: 23 January 2020 / Accepted: 5 February 2020 / Published: 14 February 2020
(This article belongs to the Section Plasma Coatings, Surfaces & Interfaces)
Using TiO2-15MgAl2O4 mixed powder as spray-feed, an electrical-heating coating was successfully fabricated by atmospheric plasma spraying technology. The phase composition, microstructure, and electrical-heating performance of the coating were characterized by XRD, SEM, and cyclic electrification tests, respectively. The coating samples were heat-treated at 350 °C in a hydrogen atmosphere. The results show that TiO2-15MgAl2O4 coating can be heated over 300 °C within 30 m at 55.1 V which preserves heat for a long time. Before heat treatment, the available heating temperature of the coating decreases significantly with electrification cycles. The resistivity of coating rises rapidly during the cyclic electricity test. After hydrogen heat treatment, the electrical-heating property of coatings is significantly enhanced.
Keywords: TiO2-15MgAl2O4 coating; electrical-heating property; atmospheric plasma spraying; resistivity; hydrogen heat treatment TiO2-15MgAl2O4 coating; electrical-heating property; atmospheric plasma spraying; resistivity; hydrogen heat treatment
MDPI and ACS Style

Li, X.; Yang, K.; Wang, D.; Deng, C.; Zhou, Y. Property of TiO2-15MgAl2O4 Electrical-Heating Coating Prepared by Atmospheric Plasma Spraying and Hydrogen Heat Treatment. Coatings 2020, 10, 177.

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