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Ceramic matrix composite

About: Ceramic matrix composite is a research topic. Over the lifetime, 7807 publications have been published within this topic receiving 117020 citations.


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TL;DR: In this article, a strategy is described to develop high toughness yttria-stabilised tetragonal zirconia polycrystalline (Y-TZP) composites reinforced with hard TiB 2 particles.
Abstract: In this paper, a strategy is described to develop high toughness yttria-stabilised tetragonal zirconia polycrystalline (Y-TZP) composites reinforced with hard TiB 2 particles. The experimental results revealed that fully dense Y-TZP composites with 30 vol.% TiB 2 can be obtained with a moderate hardness of 13 GPa, a high strength up to 1280 MPa and an excellent indentation toughness up to 10 MPa m 1/2 by hot pressing in vacuum at 1450 °C. The toughness of the composites can be tailored between 4 and 10 MPa m 1/2 by varying the yttria stabiliser content of the ZrO 2 matrix between 3 and 2 mol%. An optimum composite toughness was achieved for a ZrO 2 matrix with an overall yttria content of 2.5 mol%, obtained by mixing pure monoclinic and 3 mol% Y 2 O 3 co-precipitated ZrO 2 starting powders. An important observation is that the thermal residual tensile stress in the ZrO 2 matrix due to the TiB 2 addition, needs to be taken into account when optimising the transformability of the ZrO 2 matrix in order to develop high toughness Y-TZP composites.

47 citations

Journal ArticleDOI
TL;DR: In this paper, the results of Vickers microhardness and high-velocity impact tests on monolithic ZrB2/SiC and HfB2-SiC ultra-high temperature ceramic composites are presented.
Abstract: The results of Vickers microhardness and high-velocity impact tests on monolithic ZrB2/SiC and HfB2/SiC ultra-high temperature ceramic (UHTC) composites are presented. The UHTC materials exhibit fracture behavior typical of ceramics under indentation and impact loading. The materials are relatively hard with microhardness values of about 15 to 20 GPa. Cracks were observed to extend from the corners of indentations. Impacts of stainless steel and tungsten carbide spheres, with diameters in the 500 to 800 micron range and velocities of 200 to 300 m/s, produced minimal plastic deformation but significant radial and ring cracking at the impact sites. Impacts of micron-scale iron particles traveling at 1 to 3 km/s produced essentially no surface damage.

47 citations

Journal ArticleDOI
TL;DR: In this article, the authors discuss the difficulty of fabricating CMCs and their application in high-temperature applications in various fields, such as aerospace, marine, etc.
Abstract: Ceramic matrix composites (CMCs) are materials that can be engineered for high-temperature applications in various fields including aerospace, marine, etc. It is very difficult to fabricate CMCs us...

47 citations

Journal ArticleDOI
Ruigang Wang1, Wei Pan1, Jian Chen1, Mengning Jiang1, Yongming Luo1, Minghao Fang1 
TL;DR: In this article, layer structured LaPO4 was added to Al2O3 ceramic matrix to improve the machinability of the composites, which can be easily machined using cemented carbide drills instead of conventionally diamond tools.

47 citations

01 Jan 2007
TL;DR: In this paper, the design of ceramic-metal composites with a gradient concentration of the metal particles fabricated by the slip casting method is presented, where the gradient concentration was achieved through their sedimentation under the action of the gravitational force and a magnetic field.
Abstract: Abstract The design of ceramic–metal composites with a gradient concentration of the metal particles fabricated by the slip casting method is presented. The gradient concentration of the metal particles was achieved through their sedimentation under the action of the gravitational force and a magnetic field. The paper describes the method of calculating the distance between the ceramic particles and indicates the correlation between this distance and the size of the metal particles. Preliminary experimental results of fabricated Al2O3–Fe composites confirmed the calculations. The metal particles, whose density is higher than that of ceramic particles, can undergo gravity-induced sedimentation only when the distance between the ceramic particles is greater than the diameter of these metal particles. With a slip casting containing 50 vol.% of solid phase, no concentration gradient of metal particles occurred. The Fe gradient concentration was achieved when the sedimentation was aided by a magnetic field.

47 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202394
2022236
2021300
2020344
2019433
2018354