Self-propagating high-temperature synthesis of advanced ceramics in the Mo–Si–B system: Kinetics and mechanism of combustion and structure formation

Левашов, Е. А.; Pogozhev, Yu. S.; Potanin, A. Yu.; Кочетов, Н. А.; Kovalev, D. Yu.; Швындина, Н. В.; Свиридова, Т. А.

doi:10.1016/j.ceramint.2013.11.107

Cited by 51 publications

(29 citation statements)

References 25 publications

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“…The effect of the initial temperature (Т 0 ) of the reactionary mixture on combustion temperature (T c ) and combustion rate (U c ) was studied experimentally using a laboratory-scale SHS reactor according to the conventional procedure [11,17,18]. Cylindrical samples with 10 mm in diameter and 15 mm height with relative density equal to 60% were pressed from the reactionary mixtures.…”

Section: Methodsmentioning

confidence: 99%

The features of combustion and structure formation of ceramic materials in the Cr–Al–Si–B system

Pogozhev

Potanin

Левашов

et al. 2014

Ceramics International

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Section: Methodsmentioning

confidence: 99%

The features of combustion and structure formation of ceramic materials in the Cr–Al–Si–B system

Pogozhev

Potanin

Левашов

et al. 2014

Ceramics International

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“…However, it suffers from pest disintegration at a lower temperature range between 773 and 973 K, where the material is disintegrated into powders due to the generation of internal stresses during differential expansion of oxides [9,10]. At present, the mechanical alloying technology is used to prepare the MoSi-B and the Mo-Si-Al alloys and studies show that B and Al can improve the mechanical properties of MoSi 2 to some extent [11], but cannot improve the low-temperature oxidation resistance of coating, and cannot fundamentally solve the thermal stress mismatch problem between matrix material and coating [12][13][14]. Therefore, a fundamental study focusing on solving the thermal stress-mismatch problem between the substrate material and Mo-MoSi 2 functional gradient coating, and on phase-structure and phase-composition change regulations of the gradient coating was carried out in this paper.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and phase transformation behavior of Mo–MoSi2 gradient material

Yonghong

Shi

2014

Rare Met.

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Mo-MoSi 2 gradient coating on Mo substrate was prepared by siliconizing process, using the polysilicon as silicon atoms. The gradient layer was analyzed by the experimental results, theoretical analysis, and thermodynamic calculation. The silicon, molybdenum content of gradient coating shows a gradual change regulation. The reaction between silicon and molybdenum is most likely to generate Mo 5 Si 3 , then MoSi 2 , finally Mo 3 Si, but when the silicon content is excessive, the Mo 5 Si 3 and Mo 3 Si will react with silicon and generate MoSi 2 . The gradient layer is mainly constituted by Si and MoSi 2 , only about 1/10 gradient layer is constituted by Mo 5 Si 3 and Mo 3 Si, and the stable existences of Mo 5 Si 3 and Mo 3 Si are mainly determined by the silicon content. Along the Mo substrate to the surface of the coating, the phase composition of gradient coating changes as follows: Mo ? transition layer, Mo (main phase) ? Mo 3 Si ? Mo 5 Si 3 ? intermediate layer, and MoSi 2 (main phase) ? Mo 5 Si 3 ? Si ? surface layer MoSi 2 (main phase) ? Si, and the experimental temperature has no effect on phase composition of gradient coating.

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“…Because molybdenum based materials have some characteristic properties such as high melting point, high strength, creep strength and oxidation resistance, these alloys are widely used in the aforementioned applications. MoxSiy is a binary alloy refractory compound and therefore it has excellent strength at high temperatures [2][3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Boron on Microstructure and Microhardness Properties of Mo-Si-B Based Coatings Produced Via TIG Process

Islak

Özorak

Sezgin

et al. 2016

Archives of Metallurgy and Materials

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In this study, Mo-Si-B based coatings were produced using tungsten inert gas (TIG) process on the medium carbon steel because the physical, chemical, and mechanical properties of these alloys are particularly favourable for high-temperature structural applications. It is aimed to investigate of microstructure and microhardness properties of Mo-Si-B based coatings. Optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructures of Mo-Si-B based coatings. The XRD results showed that microstructure of Mo–Si–B coating consists of α-Mo, α-Fe, Mo2B, Mo3Si and Mo5SiB2 phases. It was reported that the grains in the microstructure were finer with increasing amounts of boron which caused to occur phase precipitations in the grain boundary. Besides, the average microhardness of coatings changed between 735 HV0.3 and 1140 HV0.3 depending on boron content.

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Self-propagating high-temperature synthesis of advanced ceramics in the Mo–Si–B system: Kinetics and mechanism of combustion and structure formation

Cited by 51 publications

References 25 publications

The features of combustion and structure formation of ceramic materials in the Cr–Al–Si–B system

The features of combustion and structure formation of ceramic materials in the Cr–Al–Si–B system

Microstructure and phase transformation behavior of Mo–MoSi2 gradient material

Effect of Boron on Microstructure and Microhardness Properties of Mo-Si-B Based Coatings Produced Via TIG Process

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