Bimodal microstructure ZrB2-MoSi2 coating prepared by atmospheric plasma spraying for carbon/carbon composites against long-term ablation

Liu, Xuezhang; Han, Wei; Wen, Kui; Deng, Chunming; Deng, Changguang; Liu, Min; Zhou, Kesong

doi:10.1016/j.ceramint.2017.09.056

Cited by 19 publications

(10 citation statements)

References 27 publications

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“…Coatings 2019, 9, 779 2 of 9 coating material and substrate [10,[15][16][17]. Thermal spraying is a highly efficient method to deposit coating.…”

Section: Methodsmentioning

confidence: 99%

“…Y2O3 acts as a stabilizer of high-temperature tetragonal and cubic modification of zirconia [10]. Aluminum acts as a bonding material for the oxidizing agent in the process of spraying and to create "plastic" lamellae and nano-dispersed inclusions, in order to relieve internal stresses [22][23][24].…”

Section: Methodsmentioning

confidence: 99%

“…Those samples used as substrates were cleaned in an ultrasonic bath with ethanol and then dried at 80 • C for 2 h. In the present study, a multi-chamber detonation accelerator [19][20][21] was employed to deposit the ZrB 2 -MoSi 2 coating. The parameters of the coating spray are listed in Table 1. Y 2 O 3 acts as a stabilizer of high-temperature tetragonal and cubic modification of zirconia [10]. Aluminum acts as a bonding material for the oxidizing agent in the process of spraying and to create "plastic" lamellae and nano-dispersed inclusions, in order to relieve internal stresses [22][23][24].…”

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confidence: 99%

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

et al. 2019

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Composite ZrB 2 -MoSi 2 coating modified by Y 2 O 3 and Al was prepared by a new multi-chamber detonation accelerator (MCDS) on carbon/carbon composites. Postdeposition heat treatment of the samples at 1500 • C for 1 and 6 h was carried out in air. The effect of heat treatment on the microstructure and phase composition of the ZrB 2 -MoSi 2 coating was investigated by scanning electron microscopy and X-ray diffraction phase analysis. The as-sprayed coating presented as a dense lamellar structure, composed of m-ZrO 2 , t-ZrO 2 , some hexagonal ZrB 2 , and cubic Al phases. The m-ZrO 2 , c-ZrO 2 , and h-(α-Al 2 O 3 ) formed at 1500 • C. The coatings after heat treatment (1 and 6 h) exhibited a structure without cracks. The porosity (~1%) of the coating did not change after heat treatment. Thin, continuous, silica-rich film covered the surfaces of ZrO 2 and Al 2 O 3 particles, and could have played a role during heat treatment by acting as a grain lubricant for particle rearrangement.

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“…Coatings 2019, 9, 779 2 of 9 coating material and substrate [10,[15][16][17]. Thermal spraying is a highly efficient method to deposit coating.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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

et al. 2019

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“…This state is achieved by using refractory boron-or aluminum-borosilicate glasses as a matrix in which reinforcing particles of silicides, carbides, and borides (less often oxides and nitrides) of metals from groups IV-VI are additionally introduced to increase the heat resistance. The use of precursors of the ZrB 2 -MoSi 2 system is promising for this class of coatings [5][6][7].…”

Section: Introductionmentioning

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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“…The introduction of MoSi 2 into ZrB 2 -MoSi 2 coatings increases the compactness of ZrB 2 and effectively reduces the oxidation consumption of ZrB 2 [23,24]. Coatings of the ZrB 2 -MoSi 2 system are obtained via electrolytic and electrophoretic deposition from solutions [25], pack cementation [17,26], slurry methods [17,[27][28][29], plasma spraying [30,31], etc. All of these methods require special preliminary surface preparation or the formation of a bonding sublayer between the coating material and the substrate [17,[25][26][27][28][29].…”

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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Bimodal microstructure ZrB2-MoSi2 coating prepared by atmospheric plasma spraying for carbon/carbon composites against long-term ablation

Cited by 19 publications

References 27 publications

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

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