期刊
CERAMICS INTERNATIONAL
卷 45, 期 10, 页码 13119-13126出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.03.246
关键词
Ti3AlC2/Cu; Nanocomposite coating; Fracture toughness; Ceramic; Thermal spraying
资金
- Yunnan Province Key Research and Development Program [2018BA067]
- National Natural Science Foundation of China [51401097]
- Yunnan Province Science and Technology Major Project [2018ZE009]
The low fracture toughness of ceramic coatings has always hindered their wide application. In this study, an insitu nanocomposite coating was prepared by the atmospheric plasma spraying of a 50 wt% Ti3AlC2-50 wt% Cu mixed powder. The in-situ nanocomposite coating was found to have an unusual microstructure with a nano-micrometre phase synergistic enhancement, which consisted of submicrometre-thick layers of Cu and nano-particles of Cu(Al), Ti4O5, TiO2, and Al2TiO5. Thus, in the spraying process, Al was delinked out of Ti3AlC2, forming a large amount of plastic Cu(Al) with Cu. The delinked channel provided a path for Cu to diffuse into Ti3AlC2, which a spatial Cu network structure was formed in the coating. The in-situ nanocomposite coating has high fracture toughness and crack growth resistance by a three-point bending test. This paper reports a new method to prepare a high-fracture-toughness composite ceramic coating.
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