High-temperature crack-healing behaviour and strength recovery of (MoNb)Si2

Zhu, Gaoming; Wang, Xiaohong; Lü, Qianqian; Wu, Guangzhi; Feng, Peizhong

doi:10.1016/j.apsusc.2015.03.064

Cited by 30 publications

(5 citation statements)

References 38 publications

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“…The self‐healing behavior of MoSi 2 dispersed in YSZ/, and their oxidation behavior was studied at temperatures ranging from (1000‐1300)°C 12,13 . Zhu et al 14 investigated the crack‐healing behavior of MoSi 2 and (MoNb)Si 2, and the results of their research showed that the cracks can be healed through the formation of an oxide layer (SiO 2 ) on the surface of the specimens at high temperatures. Takahashi et al 15 investigated the self‐crack‐healing behavior of SiC/Al 2 O 3 composites.…”

Section: Self‐healing In Ceramics Thin Films and Its Composites/ Comentioning

confidence: 99%

A review of some of experimental and numerical studies of self‐crack‐healing in ceramics

Hammood

Barber

Wang

2020

Int J Ceramic Engine & Sci

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Self-crack-healing materials have the capability of partial or complete healing cracks and the damage imposed on them as well as the capability of recovering the functionality and the integrity of the structure. 1,2 Self-crack-healing mechanisms inspired by the natural healing ability of biological systems can be categorized as either extrinsic or intrinsic. In the case of extrinsic healing, the system requires healing agents. On the other hand, intrinsic healing is inherent, the healing process is inherent in the material itself. Autonomic self-healing would make the materials ideal for aerospace and automotive applications. Among the many types of healing, only self-crack healing induced by oxidation can attain complete recovery. The crack-healed zone should be mechanically as strong as the original material to achieve

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Section: Self‐healing In Ceramics Thin Films and Its Composites/ Comentioning

confidence: 99%

A review of some of experimental and numerical studies of self‐crack‐healing in ceramics

Hammood

Barber

Wang

2020

Int J Ceramic Engine & Sci

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“…Metal silicide, , such as WSi 2 , TiSi 2 , MoSi 2 , and their related alloy, presents excellent physical and chemical properties. For example, a properly alloyed MoSi 2 would show a high bending strength at room temperature as well as an anomalous strengthening at high temperature . Moreover, because of the formation of a sealed glassy film at high temperature, MoSi 2 -based coating could block the further inward diffusion of oxygen. − It is worthwhile to note that MoSi 2 has a close thermal expansion coefficient (CTE, α MoSi2 = 8.0 × 10 –6 /°C) to niobium-based alloy (7.8–8.2 × 10 –6 /°C).…”

Section: Introductionmentioning

confidence: 99%

Silicide Coating Fabricated by HAPC/SAPS Combination to Protect Niobium Alloy from Oxidation

Sun

Guo

et al. 2016

ACS Appl. Mater. Interfaces

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A combined silicide coating, including inner NbSi2 layer and outer MoSi2 layer, was fabricated through a two-step method. The NbSi2 was deposited on niobium alloy by halide activated pack cementation (HAPC) in the first step. Then, supersonic atmospheric plasma spray (SAPS) was applied to obtain the outer MoSi2 layer, forming a combined silicide coating. Results show that the combined coating possessed a compact structure. The phase constitution of the combined coating prepared by HAPC and SAPS was NbSi2 and MoSi2, respectively. The adhesion strength of the combined coating increased nearly two times than that for single sprayed coating, attributing to the rougher surface of the HAPC-bond layer whose roughness increased about three times than that of the grit-blast substrate. After exposure at 1200 °C in air, the mass increasing rate for single HAPC-silicide coating was 3.5 mg/cm(2) because of the pest oxidation of niobium alloy, whereas the combined coating displayed better oxidation resistance with a mass gain of only 1.2 mg/cm(2). Even more, the combined coating could significantly improve the antioxidation ability of niobium based alloy at 1500 °C. The good oxidation resistance of the combined silicide coating was attributed to the integrity of the combined coating and the continuous SiO2 protective scale provided by the oxidation of MoSi2.

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“…The key material issues are to improve the fracture toughness and high temperature strength [1][2][3] . The room temperature fracture toughness and high temperature strength of MoSi 2 can be improved by alloying and composite approaches [1][2][3][4]7,8 . Alloying promotes the dislocation plasticity in MoSi 2 at low temperatures and lowers the brittle−to−ductile transition temperature (BDTT) and results in an increase in room temperature fracture toughness [2][3][4]7 .…”

Section: ·Kmentioning

confidence: 99%

“…The room temperature fracture toughness and high temperature strength of MoSi 2 can be improved by alloying and composite approaches [1][2][3][4]7,8 . Alloying promotes the dislocation plasticity in MoSi 2 at low temperatures and lowers the brittle−to−ductile transition temperature (BDTT) and results in an increase in room temperature fracture toughness [2][3][4]7 . The effects of various alloying elements on the ductility of MoSi 2 single crystals are reported from first principles calculations 2,9 .…”

Section: ·Kmentioning

confidence: 99%

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Formation of Mo−Si−Ti Alloys by Self−propagating Combustion Synthesis

Zhu

Feng

et al. 2015

Mat. Res.

Self Cite

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0.6 )Si 2 were prepared by combustion synthesis. The combustion mode, propagation velocity of combustion wave, combustion temperature and product structure were investigated. Specimens MoSi 2 , (Mo 0.9 Ti 0.1 )Si 2 , (Mo 0.8 Ti 0.2 )Si 2 , (Mo 0.7 Ti 0.3 )Si 2 , underwent spontaneously self−propagating combustion synthesis. However, the (Mo 0.6 Ti 0.4 )Si 2 and (Mo 0.5 Ti 0.5 )Si 2 specimens required a sustainable energy supply to complete the combustion synthesis reaction. There was no combustion synthesis reaction in specimen (Mo 0.4 Ti 0.6 )Si 2 . The combustion wave propagated along a spiral trajectory from top to the bottom of the specimen compacts in a layer by layer mode. The propagation velocity of the combustion wave reduced with the addition of titanium. The X-ray diffraction analysis showed that the Cll b -MoSi 2 and C40-(Mo,Ti)Si 2 type phases were formed during combustion synthesis. The intensity of diffraction peaks of C40-(Mo,Ti)Si 2 phase increased with Ti content.

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High-temperature crack-healing behaviour and strength recovery of (MoNb)Si2

Cited by 30 publications

References 38 publications

A review of some of experimental and numerical studies of self‐crack‐healing in ceramics

A review of some of experimental and numerical studies of self‐crack‐healing in ceramics

Silicide Coating Fabricated by HAPC/SAPS Combination to Protect Niobium Alloy from Oxidation

Formation of Mo−Si−Ti Alloys by Self−propagating Combustion Synthesis

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