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

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

doi:10.3390/coatings11091018

Cited by 4 publications

(8 citation statements)

References 23 publications

(26 reference 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%

Review of Research Progress in Nontraditional Machining of Ultrahigh-Temperature Ceramic Matrix Composites

et al. 2023

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Ultrahigh-temperature ceramic matrix composites are currently among the most promising high-temperature-resistant materials, owing to their high-temperature strength, high-toughness and excellent corrosion resistance; they are widely used in national defense and aerospace fields. However, it is a difficult material to machine, and high precision is difficult to achieve using traditional machining methods. Nontraditional machining methods are not constrained by material physical and mechanical properties, and good surface quality is easily obtained, which is an important direction in the field of ultrahigh-temperature ceramic matrix composites. This paper summarizes the recent nontraditional machining methods utilized in the fabrication of ultrahigh-temperature ceramic matrix composites. Firstly, various nontraditional machining methods for ultrahigh-temperature ceramic matrix composites based on borides, carbides and nitrides are reviewed, and the machining performances under different machining conditions are compared. Subsequently, the problems and challenges of ultrahigh-temperature ceramic matrix composite nontraditional machining are summarized and discussed. Lastly, the future development path of nontraditional machining methods for ultrahigh-temperature ceramic matrix composites is summarized and predicted.

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Section: Discussionmentioning

confidence: 99%

Review of Research Progress in Nontraditional Machining of Ultrahigh-Temperature Ceramic Matrix Composites

et al. 2023

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“…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%

“…In this article, the possibility of manufacturing a target for the physical deposition of coatings from the vapor phase (magnetron sputtering) using the detonation spray coating (DSC) process [ 16 , 17 , 18 ] was investigated. To fulfill these tasks, a robotic complex for detonation spraying of coatings (IntelMashin LLC, Moscow, Russia) equipped with a multi-chamber detonation accelerator (MCDS) was developed [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

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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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“…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%

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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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

Cited by 4 publications

References 23 publications

Review of Research Progress in Nontraditional Machining of Ultrahigh-Temperature Ceramic Matrix Composites

Review of Research Progress in Nontraditional Machining of Ultrahigh-Temperature Ceramic Matrix Composites

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

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

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