Effect of Heat Treatment on the Microstructure and Phase Composition of ZrB2–MoSi2 Coating

Ковалева, М. Г.; Gоncharov, I. Yu.; Novikov, V. U.; Yapryntsev, M. N.; Vagina, Olga; Pavlenko, O. Yu.; Сирота, В. В.; Tyurin, Yu. N.; Колисниченко, О.В.

doi:10.3390/coatings9120779

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…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%

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

et al. 2022

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A metal–ceramic composite target for magnetron sputtering was fabricated for the first time by a robotic complex for the detonation spraying of coatings equipped with a multi-chamber detonation accelerator. A mixture of metal and ceramic NiCr/B4C powders was sprayed onto the copper base of the cylindrical composite target cathode. The study of the structure of a metal–ceramic composite coating target using scanning electron microscopy showed that the coating material is dense without visible pores; the elemental composition is evenly distributed in the material. The study of the cathode sputtering area after deposition in the DC mode showed that there are uniform traces of annular erosion on the target surface. The obtained cathode target with an NiCr-70B4C coating was used to deposit the NiB-Cr7C3 coating on flat specimens of 65G steel using equipment for magnetron sputtering UNICOAT 200. The coating was applied in the Direct Current mode. A dense NiB-Cr7C3 coating with a thickness of 2 μm was obtained. The NiB-Cr7C3 coating has a quasi-amorphous structure. The microstructures and concentration of oxygen and carbon impurities throughout the entire thickness of the coating were investigated by means of transmission electron microscopy. The results of the study show that the coatings have a nanocrystalline multi-phase structure. The microhardness of the NiB-Cr7C3 coating reached 10 GPa, and the adhesion fracture load exceeded 16 N. The results will open up new prospects for the further elaboration of technology for obtaining original composite cathodes for magnetron sputtering using detonation spraying of coatings.

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Section: Methodsmentioning

confidence: 99%

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

et al. 2022

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“…Based on previous work [10][11][12] describing optimal technical conditions for the formation of coatings (Table 1), coatings from composite ZrB 2 -MoSi 2 -Y 2 O 3 -Al micro-powders were formed on the surface of carbon-containing materials using a multi-chamber detonation accelerator (MCDS, IntelMashin LLC, Moscow, Russia) [13][14][15]. Coatings were formed on the substrate surface without intermediate layers in the "carbon-containing materialscoating" system that perform barrier-compensation functions.…”

Section: Methodsmentioning

confidence: 99%

“…To increase the wettability of the carbon-containing materials surface, aluminum powder (10, 15 and 20 wt %) was added to the initial powder mixture. Acting as an amorphizer, aluminum oxide reduces the ability to crystallize, and the structure of the formed alloyed glass makes the coating more stable, especially at high temperatures; and, in the technologically advanced formation, it binds to the oxidizer promoting the formation of low-melting and mobile aluminum compounds (stress compensators) when heated [15][16][17]. The phase composition of the coatings was studied using a Rigaku SmartLab diffractometer equipped with a high-temperature Rigaku SHT-1500 (XFA) (Rigaku, Tokyo, Japan) prefix.…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2021

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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 heterogeneous reaction were determined. It is shown that the speed and density of the formation of a glassy matrix can be adjusted by fine-tuning the ratio of components in the initial powder.

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“…Thermal spraying is a highly efficient method to deposit coatings [32][33][34][35][36]. The use of high-speed gas-thermal methods, which impart high kinetic energy to powder particles while reducing their temperature, is expedient for obtaining coatings on the carbon-carbon materials' surface.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior and Microstructural Evolution of ZrB2–35MoSi2–10Al Composite Coating

et al. 2021

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The problem of creating and implementing high-temperature coatings for the protection of carbon–carbon (C/C) composites remains relevant due to the extremely low or insufficient heat resistance of C/C composites in an oxygen-containing environment. In the present work, detonation spraying was used for preparing new ZrB2–35MoSi2–10Al coatings on the surface of C/C composites without a sublayer. As a stabilizer of high-temperature modification of zirconia, and to increase the wettability of the surface of C/C composites, 5 wt.% Y2O3 and 10 wt.% Al were added to the initial powder mixture, respectively. The structure of the as-sprayed coating presents many lamellae piled up one upon another, and is composed of hexagonal ZrB2 (h- ZrB2), tetragonal MoSi2 (t-MoSi2), monoclinic ZrO2 (m-ZrO2), tetragonal ZrO2 (t-ZrO2), monoclinic SiO2 (m-SiO2), and cubic Al phases. The oxidation behavior and microstructural evolution of the ZrB2–35MoSi2–10Al composite coating were characterized from RT to 1400 °C in open air. During oxidation at 1400 °C, a continuous layer of silicate glass was formed on the coating surface. This layer contained cubic ZrO2 (c-ZrO2), m-ZrO2, and small amounts of mullite and zircon. The results indicated that a new ZrB2–35MoSi2–10Al composite coating could be used on the surface of C/C composites as a protective layer from oxidation at elevated temperatures.

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Effect of Heat Treatment on the Microstructure and Phase Composition of ZrB2–MoSi2 Coating

Cited by 13 publications

References 24 publications

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

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

Oxidation Behavior and Microstructural Evolution of ZrB2–35MoSi2–10Al Composite Coating

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