Microstructure and mechanical properties of 3-D interpenetrated network structure MoSi2–RSiC composite

Gao, Pengzhao; Huang, Shi-Ting; Guo, Wei‐Ming; Xie, Wen; Xiao, Huining

doi:10.1016/j.ceramint.2012.04.027

Cited by 7 publications

(27 citation statements)

References 10 publications

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“…The AAMI process helps to transfer the high-melting MoSi 2 into RSiC to form fully dense composites at low temperature (approximately 200°C) compared with that of direct MoSi 2 melting infiltration process. 15,17,31 The XRD patterns in Fig. 1 indicate that the infiltration temperature can affect the components and their MoSi 2 -RSiC composite contents.…”

Section: Resultsmentioning

confidence: 99%

“…The maximum load and elastic modulus were recorded while the test sample fractured. The following equation was used to calculate the flexural strength of the materials: 15,26…”

Section: Characterisation Of Mosi 2 -Rsic Compositesmentioning

confidence: 99%

“…However, the absence of shrinkage during the recrystallisation process results in the 3D interconnected and open-cell porous microstructure of RSiC. 15 Despite the good oxidation resistance of dense SiC material, the interconnected porous structure of RSiC is severely detrimental to its high-temperature oxidation resistance and mechanical and thermal properties. This phenomenon adversely reduces the service life of RSiC when used as high-temperature structural materials.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the melting infiltration process can be used to prepare MoSi 2 -RSiC composites with 3D interpenetrated network structure, in which RSiC works as the matrix and MoSi 2 as the infiltrator. 15 MoSi 2 -RSiC composites with 3D interpenetrated network structure can be obtained by infiltrating molten MoSi 2 into the pores of RSiC, which possesses excellent high-temperature oxidation resistance and mechanical and electrical properties. 23 However, the high infiltration temperature (2050-2100°C) prevents the actual application of the composites, and the weak interface binding between MoSi 2 and RSiC restricts further improvement of these properties.…”

Section: Introductionmentioning

confidence: 99%

“…22,23 The interface binding properties of MoSi 2 -RSiC composites have also been modified via a combined polycarbosilane (PCS) infiltration pyrolysis and MoSi 2 melting infiltration because the costly and inadequate PCS limits the application of the composites. 15 Heinrich reported the use of MoSi 2 alloy melting infiltration method to produce the MoSi 2 -SiC composite at a low temperature (below 1600°C), in which SiC + C green body was used as the matrix. The obtained composites exhibited excellent mechanical properties at room and elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and electrical properties of MoSi₂–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi₂–Si–Ti alloy-activated melting infiltration composite processes

Xie

Gao

et al. 2016

Advances in Applied Ceramics

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A three-dimensional interpenetrated network structure composite was designed and prepared via a combination of phenolic resin infiltration-pyrolysis and MoSi 2 -Si-Ti alloy-activated melting infiltration processes to effectively merge the desirable properties of MoSi 2 and RSiC. Influence of infiltration temperature on the microstructure, mechanical and electrical properties of the composites was examined. Almost dense MoSi 2 -RSiC composites with the designed structure were obtained at 1900°C. Formation of the gradient interface modified the interface combination and enhanced the mechanical and electrical properties of the composite. Flexural strength of the composites reached approximately 114.262 MPa (room temperature) and 128.392 MPa (1400°C), respectively, indicating corresponding increases of 37.08 and 35.69% compared with the RSiC matrix. Volume resistivity decreased to 57.63 mΩ cm, nearly five orders of magnitude lower than that of RSiC. Influence of the interpenetrated network structure and interface combination on the electrical conductivity behaviour of the composites was discussed via a modified mixture rule.

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Section: Resultsmentioning

confidence: 99%

“…The maximum load and elastic modulus were recorded while the test sample fractured. The following equation was used to calculate the flexural strength of the materials: 15,26…”

Section: Characterisation Of Mosi 2 -Rsic Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical and electrical properties of MoSi₂–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi₂–Si–Ti alloy-activated melting infiltration composite processes

Xie

Gao

et al. 2016

Advances in Applied Ceramics

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High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

et al. 2019

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In the present paper, MoSi 2 (Cr 5 Si 3)-RSiC composites were prepared via a combination of precursor impregnation pyrolysis (PIP) and MoSi 2 −Si−Cr alloy active melt infiltration (AAMI) process. Composition, microstructure, mechanical retention characteristics, and oxidation behaviors of the composites at elevated temperature were studied. X-ray diffraction (XRD) pattern confirms that the composites mainly compose of 6H-SiC, hexagonal MoSi 2 , and tetragonal Cr 5 Si 3. Scanning electron microscopy (SEM) image reveals that nearly dense MoSi 2 (Cr 5 Si 3)-RSiC composites exhibiting three-dimensionally (3D) interpenetrated network structure are obtained when infiltrated at 2173 K, and the interface combination of the composites mainly depends on the composition ratio of infiltrated phases. Oxidation weight gain rate of the composites is much lower than that of RSiC matrix, where MoSiCr2 possesses the lowest value of 0.1630 mg⋅cm −2 , about 78% lower than that of RSiC after oxidation at 1773 K for 100 h. Also, it possesses the highest mechanical values of 139.54 MPa (flexural strength σ f and RT) and 276.77 GPa (elastic modulus E f and RT), improvement of 73.73% and 29.77% as compared with that of RSiC, respectively. Mechanical properties of the composites increase first and then decrease with the extension of oxidation time at 1773 K, due to the cooperation effect of surface defect reduction via oxidation reaction and thermal stress relaxation in the composites, crystal growth, and thickness increase of the oxide film. Fracture toughness of MoSiCr2 reaches 2.24 MPa•m 1/2 (1673 K), showing the highest improvement of 31.70% as compared to the RT value.

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Detailed electrical and mechanical retention characteristics of MoSi2–RSiC composites exhibiting three-dimensional (3D) interpenetrated network structure during long-term high-temperature oxidation process

Xie

Gao

et al. 2016

Ceramics International

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Microstructure and mechanical properties of 3-D interpenetrated network structure MoSi2–RSiC composite

Cited by 7 publications

References 10 publications

Mechanical and electrical properties of MoSi₂–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi₂–Si–Ti alloy-activated melting infiltration composite processes

Mechanical and electrical properties of MoSi₂–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi₂–Si–Ti alloy-activated melting infiltration composite processes

High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

Detailed electrical and mechanical retention characteristics of MoSi2–RSiC composites exhibiting three-dimensional (3D) interpenetrated network structure during long-term high-temperature oxidation process

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Microstructure and mechanical properties of 3-D interpenetrated network structure MoSi2–RSiC composite

Cited by 7 publications

References 10 publications

Mechanical and electrical properties of MoSi2–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi2–Si–Ti alloy-activated melting infiltration composite processes

Mechanical and electrical properties of MoSi2–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi2–Si–Ti alloy-activated melting infiltration composite processes

High temperature mechanical retention characteristics and oxidation behaviors of the MoSi2(Cr5Si3)—RSiC composites prepared via a PIP—AAMI combined process

Detailed electrical and mechanical retention characteristics of MoSi2–RSiC composites exhibiting three-dimensional (3D) interpenetrated network structure during long-term high-temperature oxidation process

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Mechanical and electrical properties of MoSi₂–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi₂–Si–Ti alloy-activated melting infiltration composite processes

Mechanical and electrical properties of MoSi₂–RSiC composites via a combination of phenolic resin infiltration–pyrolysis and MoSi₂–Si–Ti alloy-activated melting infiltration composite processes