Microstructure and mechanical properties of Nb–Ti–Si–Al–Hf–xCr–yV multi-element in situ composite

Kang, Yongwang; Qu, Shiyu; Song, Jinxia; Huang, Qiang; Yan, Han

doi:10.1016/j.msea.2011.11.076

Cited by 42 publications

(10 citation statements)

References 37 publications

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“…The matrix in these composites consists of SiC and residual alloys such as Si, silicides, and the eutectic structure. Silicides and eutectic alloys outperform Si and SiC in mechanical properties . Some silicides show ductile transition at several hundred degrees, and the brittle‐to‐ductile transition temperature of silicide is lower than that of Si .…”

Section: Introductionmentioning

confidence: 99%

“…High‐fracture toughness of silicides is expected above the transition temperature. Moreover, Si eutectic alloys have a fracture toughness that is several times higher than Si due to fine alloy microstructure …”

Section: Introductionmentioning

confidence: 99%

“…Silicides and eutectic alloys outperform Si and SiC in mechanical properties. [14][15][16][17][18][19] Some silicides show ductile transition at several hundred degrees, and the brittle-to-ductile transition temperature of silicide is lower than that of Si. 14,18,20,21 High-fracture toughness of silicides is expected above the transition temperature.…”

mentioning

confidence: 99%

“…Moreover, Si eutectic alloys have a fracture toughness that is several times higher than Si due to fine alloy microstructure. [15][16][17]22 The oxidation behavior of SiC f /SiC composites is a critical issue for structural component applications in elevated temperatures such as turbines. The oxidation behavior of Si and SiC is known to be superior to other materials.…”

mentioning

confidence: 99%

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Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

et al. 2019

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SiC‐fiber–reinforced binary Si eutectic alloy composites have been developed for aerospace applications using the melt infiltration method. In this study, the oxidation mechanisms of various binary Si eutectic alloys were evaluated at elevated temperatures. We suggest that the oxidation resistance of eutectic alloys could be predicted using the Gibbs energy change for the oxidation reaction. Based on these calculations, eutectic alloys of Si‐16at%Ti, Si‐17at%Cr, Si‐22at%Co, Si‐38at%Co, and Si‐27at%Fe were prepared. These alloys produced uniform SiO2 layers and showed the same oxidation resistance as Si at 1000°C under humid conditions. Therefore, SiC composites using Si alloys with excellent oxidation resistance can be predicted using thermodynamic calculations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

et al. 2019

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“…Alloying elements such as Ti, Cr, Al, Hf [8][9][10] , Mo [11][12][13] , Zr, Ta [14] and W [15] have been added to Nb-Si alloys at Si concentrations ranging from 12 at% to 22 at%. Nb/Nb 5 Si 3 composites have usually been fabricated from the Nb-Si system via vacuum arc-melting technology, yielding end products composed of primary Nbss and (Nb + Nb 3 Si) eutectic compositions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Al addition on the microstructure and properties of Nb/Nb5Si3 in situ composites fabricated via spark plasma sintering

Long

Yao

2014

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Dense Nb/Nb 5 Si 3 composites were fabricated via spark plasma sintering technology using Nb, Si, and Al elemental powders as raw materials. The microstructures of the synthesised composites were analyzed through scanning electron microscopy, X-ray diffraction, and electron probe microanalysis. The results show that the composites consisted of residual Nb particle phase and Nb 5 Si 3 phase. The microstructure of the Nb/ Nb 5 Si 3 in situ composites was evidently affected by Al addition, which prompted the formation of the Al 3 Nb 10 Si 3 phase. In addition, the Rockwell hardness of the composites decreased with the increase in Al additions. The Rockwell hardness of Nb-20Si is 60HRC, which decreased to approximately 52.7 HRC when the Al content increased to 15 at%. The oxidation resistance of the Nb/Nb 5 Si 3 in situ composites signifi cantly improved with the increase in Al addition.

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Microstructure and Room-Temperature Fracture Toughness of Nb–Ti–Si In Situ Composite Prepared by Selective Laser Melting

Kang

Guo

2019

Springer Proceedings in Physics

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Microstructure and mechanical properties of Nb–Ti–Si–Al–Hf–xCr–yV multi-element in situ composite

Cited by 42 publications

References 37 publications

Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

Effects of Al addition on the microstructure and properties of Nb/Nb5Si3 in situ composites fabricated via spark plasma sintering

Microstructure and Room-Temperature Fracture Toughness of Nb–Ti–Si In Situ Composite Prepared by Selective Laser Melting

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