Open AccessProperty of TiO2-15MgAl2O4 Electrical-Heating Coating Prepared by Atmospheric Plasma Spraying and Hydrogen Heat Treatment
Author(s) -
LI Xi-yang,
Kun Yang,
Dezhi Wang,
Chunming Deng,
Yanzhe Zhou
Publication year - 2020
Publication title -
coatings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 37
ISSN - 2079-6412
DOI - 10.3390/coatings10020177
Subject(s) - coating , materials science , microstructure , hydrogen , plasma , electrical resistivity and conductivity , atmospheric pressure plasma , electric heating , composite material , metallurgy , chemistry , electrical engineering , organic chemistry , physics , quantum mechanics , engineering
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.