scispace - formally typeset
Search or ask a question
Topic

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.


Papers
More filters
Patent
30 Apr 1987
TL;DR: In this article, a method for producing a self-supporting ceramic or ceramic composite body by the oxidation of a parent metal to form a polycrystalline ceramic material comprising the oxidation reaction product of said parent metal with an oxidant, including a vapor phase oxidant and optionally one or more metallic constituents dispersed throughout the polycrystaline material.
Abstract: In the present invention, there is provided a method for producing a self-supporting ceramic or ceramic composite body by the oxidation of a parent metal to form a polycrystalline ceramic material comprising the oxidation reaction product of said parent metal with an oxidant, including a vapor-phase oxidant, and optionally one or more metallic constituents dispersed throughout the polycrystalline ceramic material. The method comprises the steps of providing at least a portion of said parent metal with a barrier means at least partially spaced from said parent metal for establishing at least one surface of the ceramic body, and heating said parent metal to a temperature above its melting point but below the melting point of the oxidation reaction product to form a body of molten metal. At that temperature, the molten metal is reacted with the oxidant, thus forming the oxidation reaction product. At least a portion of the oxidation reaction product is maintained in contact with and between the molten metal and oxidant to transport the molten metal through the oxidation reaction product toward the barrier means and into contact with fresh oxidant so that the oxidation reaction product continues to form at and interface between the oxidant and previously formed oxidation reaction product. The reaction is continued until the oxidation reaction product contacts the barrier means to produce a ceramic body having the surface established by the barrier means. A shaped ceramic composite is formed by superimposing a barrier means either a loose mass of filler material such as a preform to, and infiltrating the mass of filler or preform with the polycrystalline ceramic matrix, which grows until it contacts the barrier means.

39 citations

Journal ArticleDOI
TL;DR: In this paper, C/C-ZrC composites with continuous ZrC matrix were prepared by precursor infiltration and pyrolysis process using zirconium-containing polymer.

39 citations

Journal ArticleDOI
TL;DR: The flexural strength and fracture toughness of C/ZrC composites with 0.05μm thickness SiC layer were 252 MPa and 13.6 MPa, respectively as mentioned in this paper.

39 citations

Journal ArticleDOI
TL;DR: In this article, the microstructure, mechanical properties and fracture behavior of the composites were investigated by X-ray diffraction, scanning and transimision electron microcopies, and three point bending tests, and results showed that the flexural strength and the fracture toughness of the SiCpl/BAS composites increases with increasing SiC platelet content.
Abstract: BaAl2Si2O8 glass ceramics were synthesized by sol-gel using partial alkoxides. The crystallization behavior of BaAl2Si2O8 gel was characterized by XRD, DTA and TGA techniques. Barium aluminosilicate glass ceramic matrix composites reinforced with SiC platelets were fabricated by hot pressing method. The microstructure, mechanical properties and fracture behavior of the composites were investigated by X-ray diffraction, scanning and transimision electron microcopies, and three point bending tests. The results show that the flexural strength and the fracture toughness of the SiCpl/BAS composites increases with increasing SiC platelet content. By incorporation of 30 vol.% SiCpl, the flexural strength and the fracture toughness of the composites increase 80% and 114% compared to the pure BAS matrix, respectively. The main toughening mechanism is crack deflection.

39 citations

Journal ArticleDOI
TL;DR: In situ X-ray studies of the reactions indicated that BaCO3 decomposes first to yield BaO which reacts with SiO2 to yield a series of barium silicates which then react with Al2O3 between 950 and 1300°C to yield hexacelsian BAS as mentioned in this paper.
Abstract: Silicon nitride (94.5% α, 5.5% β), BaCO3, Al2O3, and SiO2 powders were mixed and pressureless sintered to produce a ceramic matrix composite consisting of 30 vol% barium aluminosilicate (BaO·Al2O3·2SiO2 or BAS) matrix reinforced with in situ grown whiskers of β-Si3N4. In situ X-ray studies of the reactions indicated that BaCO3 decomposes first to yield BaO which reacts with SiO2 to yield a series of barium silicates which then react with Al2O3 between 950 and 1300°C to yield hexacelsian BAS. The sintering times were varied in order to develop a material system that combines the favourable properties of BAS with the high strength of Si3N4. In situ high-temperature X-ray studies after composite processing did not reveal any changes in the BAS or Si3N4 up to temperatures of 1300°C. Dilatometry studies of the sintered composite indicated a low-temperature transformation between 230 and 260°C with the temperature of transformation and volume change associated with the hexagonal to orthorhombic transformation decreasing with an increase of sintering time. Room- and high-temperature (1400°C) strengths were evaluated using four-point bend flexural tests. Composites exhibited near theoretical densities and an increase in flexural strength that was primarily dependent on the higher α- to β-Si3N4 transformation.

39 citations


Network Information
Related Topics (5)
Microstructure
148.6K papers, 2.2M citations
91% related
Alloy
171.8K papers, 1.7M citations
87% related
Ultimate tensile strength
129.2K papers, 2.1M citations
84% related
Nanocomposite
71.3K papers, 1.9M citations
83% related
Coating
379.8K papers, 3.1M citations
82% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202394
2022236
2021300
2020344
2019433
2018354