Mechanical property improvements in Nicalon SiC fibre reinforced silicon nitride ceramics by oxide coating of Si3N4 starting powders

Demir, Adem; Tatlı, Zafer

doi:10.1016/j.compositesa.2004.05.007

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…As known, the characteristics of fiber/matrix interface play a key role in controlling the mechanical property of the continuous fiber-reinforced ceramic matrix composites (CFCCs) [8,9,10]. Consequently, the emphasis on the optimization of the mechanical property of the CFCCs has been based on modifying the fiber/matrix interface.…”

Section: Resultsmentioning

confidence: 99%

Dielectric and Mechanical Properties of Unidirectional SiC Fiber-Reinforced Aluminum Phosphates Composite

Wang

Tian

2007

KEM

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In this paper, the unidirectional SiC fiber-reinforced aluminum phosphates composites, in which the SiC fibers were heat-treated at different temperature, time and in different method, were prepared. The dielectric and mechanical properties of the composites were studied. The influences of heat treatment of SiC fiber on the properties of the SiC fiber-reinforced aluminum phosphates composite were investigated in detail. The flexural strength, relative dielectric constant and dielectric dissipation factor of the composite were measured. And the microstructure of the composite was characterized by SEM (scanning electronic microscope). The results show that heat treatment of SiC fiber has a great influence on mechanical and dielectric properties of the composite. The heat treatment decreases the dielectric constant and dielectric dissipation factor of the composite enormously. But at the same time, the heat treatment of the SiC fiber makes an unfavorably strongly bonded SiC fiber/aluminum phosphates matrix interface, which decreases the strength of the composite extraordinarily. And the composite displays a completely brittle failure behavior without fiber debonding and pulling out, which is detected by SEM.

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Section: Resultsmentioning

confidence: 99%

Dielectric and Mechanical Properties of Unidirectional SiC Fiber-Reinforced Aluminum Phosphates Composite

Wang

Tian

2007

KEM

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“…Recently, different kinds of coating have been suggested [9][10][11][12][13][14], but it has been recognized that the carbon is one of the most commonly used and effective coating materials [15]. For example, the flexural strength of a Si-C-O composite containing CVD carbon-coated Nicalon fibers was found to be five times higher than that of the composite containing uncoated Nicalon fibers [7].…”

Section: Introductionmentioning

confidence: 99%

SiC fibers with controllable thickness of carbon layer prepared directly by preceramic polymer pyrolysis routes

et al. 2011

Materials Science and Engineering: B

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“…F IBER-REINFORCED COMPOSITES IN structural applications, the aerospace industry, sporting goods, and chemical engineering have been widely studied by many scientists [1,2] and the short-fiber-reinforced composites will increasingly be used in a wide range of applications because of their easy adaptability to conventional manufacturing techniques and the low cost of fabrication [3,4]. The increasing applications of short-fiber-reinforced composites make it more important to understand their properties.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Short Carbon Fibers in C_fiber/Si₃N₄ Composites by Hot Pressed Sintering

Wang

Zhu

et al. 2008

Journal of Reinforced Plastics and Composites

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Cfiber/Si3N4 composites were prepared by introducing short carbon fibers into a mixture of silicon nitride and sintering additives (La2O3—Y2O 3) by hot pressed sintering. The effects of fibers on microstructure and mechanical properties of composites were discussed after higher temperature sintering. The corrosion of carbon fibers was manifested in two characteristic ways: (1) the internal fiber had exfoliative structure and some serious cavities were easily found at the interfaces between Si3N4 matrix and carbon fibers; (2) the fiber surface was covered by β-Si3N 4 crystallites. When the fiber content varied from 0 to 1 wt%, the fracture toughness increased from 6.6 MPa · m1/2 to 8.01 MPa· m 1/2. The flexural strength decreased from 638.14 MPa to 584.63 MPa with the rise of short fiber content.

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Mechanical property improvements in Nicalon SiC fibre reinforced silicon nitride ceramics by oxide coating of Si3N4 starting powders

Cited by 12 publications

References 18 publications

Dielectric and Mechanical Properties of Unidirectional SiC Fiber-Reinforced Aluminum Phosphates Composite

Dielectric and Mechanical Properties of Unidirectional SiC Fiber-Reinforced Aluminum Phosphates Composite

SiC fibers with controllable thickness of carbon layer prepared directly by preceramic polymer pyrolysis routes

Behavior of Short Carbon Fibers in C_fiber/Si₃N₄ Composites by Hot Pressed Sintering

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Mechanical property improvements in Nicalon SiC fibre reinforced silicon nitride ceramics by oxide coating of Si3N4 starting powders

Cited by 12 publications

References 18 publications

Dielectric and Mechanical Properties of Unidirectional SiC Fiber-Reinforced Aluminum Phosphates Composite

Dielectric and Mechanical Properties of Unidirectional SiC Fiber-Reinforced Aluminum Phosphates Composite

SiC fibers with controllable thickness of carbon layer prepared directly by preceramic polymer pyrolysis routes

Behavior of Short Carbon Fibers in Cfiber/Si3N4 Composites by Hot Pressed Sintering

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Behavior of Short Carbon Fibers in C_fiber/Si₃N₄ Composites by Hot Pressed Sintering