2021
DOI: 10.3390/coatings11091018
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Kinetics Investigation of the Formation of a Gas-Resistant Glass-Forming Layer during the Oxidation of ZrB2-MoSi2-Y2O3-Al Coatings in the Air Atmosphere

Abstract: In this article, the coatings of ZrB2-xMoSi2-Y2O3-yAl (x = 24, 35, 45 wt %; y = 10, 15, 20 wt %) were applied to the surface of a carbon/carbon composite to protect against high-temperature oxidation using a multi-chamber detonation accelerator. The kinetic analysis of the formation processes of a glass-forming layer during the oxidation of the initial components of the system ZrB2-MoSi2-Y2O3-Al in an air atmosphere at a temperature of 1400 °C was carried out and the kinetically significant stages of the heter… Show more

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Cited by 4 publications
(8 citation statements)
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“…However, these technologies cannot simultaneously achieve economical, stable and non-destructive machining of boride-based UHTCMCs. As the preparation of new boride-based UHTCMCs will develop toward homogenization, low porosity and more stable physical and chemical properties [102,103], better nontraditional machining methods need to be developed. The presence of transition metal oxides in the heat affected zone has significant influence on the surface quality and removal efficiency of the materials.…”
Section: Discussionmentioning
confidence: 99%
“…However, these technologies cannot simultaneously achieve economical, stable and non-destructive machining of boride-based UHTCMCs. As the preparation of new boride-based UHTCMCs will develop toward homogenization, low porosity and more stable physical and chemical properties [102,103], better nontraditional machining methods need to be developed. The presence of transition metal oxides in the heat affected zone has significant influence on the surface quality and removal efficiency of the materials.…”
Section: Discussionmentioning
confidence: 99%
“…Copper cathode target of equipment for magnetron sputtering UNICOAT 200 (NPF “Elan-praktik”, Dzerzhinsk, Russia) in the form of the rotating cylindrical target (100 mm × 5 mm, Ø 71 mm) was made. A powder NiCr-70B 4 C was sprayed on the surface of cathode targets by a robotic complex for detonation spraying of coatings (IntelMashin LLC, Moscow, Russia) equipped with a multi-chamber detonation accelerator (MCDS) [ 16 , 17 , 18 ]. The robotic complex was manufactured by IntelMashin LLC (Russia) for Belgorod State Technological University V.G.…”
Section: Methodsmentioning
confidence: 99%
“…The multi-chamber detonation device and cumulative technology are widely used in industry to obtain dense coatings with high adhesive and cohesive properties [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. This technology has a huge potential for the production of metal–ceramic composite targets from a mixture of micro-powders due to the following advantages: the ability to spray almost any powder compositions, high deposition efficiency of the coating up to 90%, the possibility of spraying large areas at a relatively low cost of the process, differentiation in thickness and size of the coating.…”
Section: Methodsmentioning
confidence: 99%
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“…In connection with the above, the purpose of this work is to show the effectiveness of a robotic complex for the detonation spraying of coatings (IntelMashin LLC., Moscow, Russia), equipped with a multi-chamber detonation accelerator for obtaining original composite ZrB 2 -35MoSi 2 -10Al coating on carbon-carbon composites via oxidation at elevated temperatures. A total of 5 wt.% Y 2 O 3 was added to the initial powder mixture as a stabilizer of high-temperature tetragonal and cubic modification of zirconia [31,38]. Coatings of the ZrB 2 -MoSi 2 system were formed on the surface of carbon-carbon composites without intermediate layers to perform barrier-compensation functions.…”
Section: Introductionmentioning
confidence: 99%