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Open AccessArticle

Zircon-Based Ceramic Coatings Formed by a New Multi-Chamber Gas-Dynamic Accelerator

1
Joint Research Center “Technology and Materials”, Belgorod State National Research University, Pobeda 85, Belgorod 308015, Russia
2
E.O. Paton Electric Welding Institute, NASU, Bozhenko 11, Kyiv 03650, Ukraine
3
Center for High Technologies, Belgorod State Technological University named after V.G. Shoukhov, Kostyukov 46, Belgorod 308012, Russia
*
Author to whom correspondence should be addressed.
Coatings 2017, 7(9), 142; https://doi.org/10.3390/coatings7090142
Received: 26 July 2017 / Revised: 4 September 2017 / Accepted: 5 September 2017 / Published: 8 September 2017
In this work, dense zircon-based ceramic coatings were obtained from inexpensive zircon powder on a steel substrate by using a new multi-chamber gas-dynamic accelerator. The microstructure and phase composition of the coating were characterized by scanning electron microscopy, optical microscopy, and X-ray diffraction. The mechanical properties of the coatings were evaluated using microindentation, wear tests and bonding strength tests. The results showed that the obtained zircon-based ceramic coatings were continuous without cracks and bonded well with substrate without a sublayer. The zircon-based ceramic coatings consisted of c-ZrO2 (major phase), m-ZrO2 and SiO2. The zircon-based ceramic coatings had a porosity of 0.1%, hardness of 526 ± 65 HV0.2, and a fracture toughness of 2.5 ± 0.6 (МPа∙m1/2). The coatings showed the low specific wear rate and average erosion rate. The failure mode occurring in the tested coatings was cohesive. View Full-Text
Keywords: zircon; coating; microstructure; micro-hardness; wear; multi-chamber gas-dynamic accelerator zircon; coating; microstructure; micro-hardness; wear; multi-chamber gas-dynamic accelerator
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Kovaleva, M.; Prozorova, M.; Arseenko, M.; Tyurin, Y.; Kolisnichenko, O.; Yapryntsev, M.; Novikov, V.; Vagina, O.; Sirota, V. Zircon-Based Ceramic Coatings Formed by a New Multi-Chamber Gas-Dynamic Accelerator. Coatings 2017, 7, 142.

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