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Coatings 2017, 7(9), 142; doi:10.3390/coatings7090142

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.
Received: 26 July 2017 / Revised: 4 September 2017 / Accepted: 5 September 2017 / Published: 8 September 2017
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

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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