Particle and Whisker Reinforced Brittle Matrix Composites

Hansson, Thomas; Warren, Richard

doi:10.1016/b0-08-042993-9/00102-9

Cited by 5 publications

(2 citation statements)

References 149 publications

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“…Adding up to 5% Cr improved the flexural strength by a little because when a second phase with better strength characteristics is reinforced in a typical ceramic material, the flexural strength of the material improves to a certain degree. 26 However, as mentioned previously, there was little difference in the flexural strengths of Cr0, Cr5, and Cr10. Further, as mentioned previously, adding 25% or more Cr significantly increased the internal porosity, decreasing the composite's mechanical properties.…”

Section: Resultsmentioning

confidence: 69%

Mechanical properties of C–SiC composite materials fabricated by the Si–Cr alloy melt-infiltration method

Seyoung

Han

Seong

et al. 2014

Journal of Composite Materials

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Although carbon fiber-reinforced silicon carbide matrix composites fabricated using the liquid silicon infiltration method exhibit high thermal and oxidation resistances, their physical characteristics are limited because of the presence of unreacted, free Si within the materials. To resolve this problem, ingots prepared by alloying Cr with Si in ratios of 0, 5, 10, 25, and 50 at% were melted and made to infiltrate the composite, resulting in the formation of CrSi 2 in the unreacted, free Si region without degrading the composite's properties. The CrSi 2 in the composite material reduced the amount of free Si and caused minimal variation in the flexural strength while significantly improving the fracture toughness of the composite. The results of scanning electron microscopy and transmission electron microscopy analyses indicated that the improvement in the fracture toughness was due to the presence of an amorphous interlayer between the Si and CrSi 2 phases, as well as because of a stress field surrounding the CrSi 2 phase.

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Section: Resultsmentioning

confidence: 69%

Mechanical properties of C–SiC composite materials fabricated by the Si–Cr alloy melt-infiltration method

Seyoung

Han

Seong

et al. 2014

Journal of Composite Materials

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“…Due to a combination of unique properties, silicon carbide (SiC) ceramics find extensive application in several fields of engineering as materials for advanced energy systems, such as high-performance combustion systems, fuel-flexible gasification systems, fuel cell/turbine hybrid systems, nuclear fusion reactors, and high temperature gas-cooled fission reactors [1][2][3][4]. The SiC/SiC composite material is especially under study as the first wall material of the blanket because of its excellent heat resistance and low activation property [5][6][7][8][9]. Many studies are being conducted in order to solve the brittle nature of ceramics [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Crack Healing of SiC according to Times of SiO₂Colloid Coating

Nam

2013

Journal of Powder Technology

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Crack healing behavior of SiC ceramics with large crack width has been studied as a function of coating and heat treatment. The SiO2colloid coating was carried out on two types: hydrostatic pressure coating and roll coating. The crack healing was one hour at 1173 K in air. The crack part formed SiO2oxides until the critical times by a hydrostatic pressure method. The crack does not anymore heal if it exceeds the critical times. The crack part and the base part have many O components and Si components regardless of the times of coating and heat treatment. The combined hydrostatic and rolling coating method did not have nearly an effect on crack-healing for large crack width over 1.4 μm. The study for more effective healing of a large crack width must be carried out in the future.

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