Strength of a Hi‐Nicalon™/Silicon‐Carbide‐Matrix Composite Fabricated by the Multiple Polymer Infiltration‐Pyrolysis Process

Takeda, Michio; Kagawa, Yutaka; Mitsuno, Shiro; Imai, Yoshikazu; Ichikawa, Hiroshi

doi:10.1111/j.1151-2916.1999.tb01960.x

Cited by 49 publications

(31 citation statements)

References 8 publications

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“…The large dark "blobs" are pores that existed in the composite, and the same type of pores are usually observed in PIP-processed composites 10 (Fig. 1(a)).…”

Section: Resultsmentioning

confidence: 88%

Temperature Dependence of Tensile Strength for a Woven Boron‐Nitride‐Coated Hi‐Nicalon™ SiC Fiber‐Reinforced Silicon‐Carbide‐Matrix Composite

Guo

Kagawa

2001

Journal of the American Ceramic Society

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The temperature dependence of tensile fracture behavior and tensile strength of a two-dimensional woven BN-coated HiNicalon™ SiC fiber-reinforced SiC matrix composite fabricated by polymer infiltration pyrolysis (PIP) were studied. A tensile test of the composite was conducted in air at temperatures of 298 (room temperature), 1200, 1400, and 1600 K. The composite showed a nonlinear behavior for all the test temperatures; however, a large decrease in tensile strength was observed above 1200 K. Young's modulus was estimated from the initial linear regime of the tensile stress-strain curves at room and elevated temperatures, and a decrease in Young's modulus became significant above 1200 K. The multiple transverse cracking that occurred was independent of temperature, and the transverse crack density was measured from fractographic observations of the tested specimens at room and elevated temperatures. The temperature dependence of the effective interfacial shear stress was estimated from the measurements of the transverse crack density. The temperature dependence of in situ fiber strength properties was determined from fracture mirror size on the fracture surfaces of fibers. The decrease in the tensile strength of the composite up to 1400 K was attributed to the degradation in the strength properties of in situ fibers, and to the damage behavior exception of the fiber properties for 1600 K.

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“…The large dark "blobs" are pores that existed in the composite, and the same type of pores are usually observed in PIP-processed composites 10 (Fig. 1(a)).…”

Section: Resultsmentioning

confidence: 88%

Temperature Dependence of Tensile Strength for a Woven Boron‐Nitride‐Coated Hi‐Nicalon™ SiC Fiber‐Reinforced Silicon‐Carbide‐Matrix Composite

Guo

Kagawa

2001

Journal of the American Ceramic Society

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“…SiC f /SiC 복합체를 치밀하게 제조하는 방법에는 고온가 압 소결법 [13], 슬러리 함침법(slurry infiltration method) [12,14], 용융 함침법(melt infiltration method) [15] 및 화학기 상 침착법(CVI) [16] [32] …”

Section: 장섬유 강화 세라믹 복합체의 치밀화를 위 한 화학기상 침착법unclassified

Fabrication of SiC_f/SiC Composite by Chemical Vapor Infiltration

Park¹,

Kim²,

Kim³

2017

Composites Research

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Among several fabrication processes of SiC f /SiC composites, the chemical vapor infiltration (CVI) process has attractive advantages in manufacturing complex net-or near-net-shape components at relatively low temperatures, easily controlling the microstructure of the matrix and obtaining the highest SiC purity level. However, it has disadvantages in that the ratio of residual pores in matrix is higher than other processes and processing time is relatively long. To reduce the residual porosity, the whisker-growing-assisted CVI process, which is composed of whisker growth and matrix filling steps has been developed. The whiskers grown before matrix filling may serve to divide the large natural pores between the fibers or bundles so that the matrix can be effectively filled into the finely divided pores. In this paper, the fundamentals of the CVI process for preparation of SiC f /SiC composites and some experimental results prepared by CVI and whisker-growing-assisted CVI processes are briefly introduced.

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“…mainly those consisting of a SiC or Si 3 N 4 based matrix reinforced with either carbon or SiC fibers, have the potential for being used as structural materials at temperatures up to 1500 • C, in different fields including advanced engines, gas turbines for power/steam co-generation, heat exchangers, heat treatment and materials growth furnaces, as well as nuclear reactors of the future. 1,2 CMC are processed according to: (i) the gas phase route (CVI: chemical vapor infiltration), 3 (ii) the liquid phase routes either from polymers (PIP: polymer impregnation and pyrolysis), 4,5 or molten elements reacting with ceramic charges in the preforms or with the atmosphere (RMI: reactive melt infiltration), 6 (iii) the ceramic route, i.e. a technique combining the impregnation of the reinforcement with a slurry and a sintering step at high temperature and high pressure (SI-HP: slurry infiltration and hot processing) 7,8 or finally (iv) some hybrid processes, [9][10][11][12][13][14][15][16] i.e.…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber/reaction-bonded carbide matrix for composite materials – Manufacture and characterization

Magnant

Maillé

Pailler

et al. 2012

Journal of the European Ceramic Society

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The processing of self-healing ceramic matrix composites by a short time and low cost process was studied. This process is based on the deposition of fiber dual interphases by chemical vapor infiltration and on the densification of the matrix by reactive melt infiltration of silicon. To prevent fibers (ex-PAN carbon fibers) from oxidation in service, a self-healing matrix made of reaction bonded silicon carbide and reaction bonded boron carbide was used. Boron carbide is introduced inside the fiber preform from ceramic suspension whereas silicon carbide is formed by the reaction of liquid silicon with a porous carbon xerogel in the preform. The ceramic matrix composites obtained are near net shape, have a bending stress at failure at room temperature around 300 MPa and have shown their ability to self-healing in oxidizing conditions.

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Strength of a Hi‐Nicalon™/Silicon‐Carbide‐Matrix Composite Fabricated by the Multiple Polymer Infiltration‐Pyrolysis Process

Cited by 49 publications

References 8 publications

Temperature Dependence of Tensile Strength for a Woven Boron‐Nitride‐Coated Hi‐Nicalon™ SiC Fiber‐Reinforced Silicon‐Carbide‐Matrix Composite

Temperature Dependence of Tensile Strength for a Woven Boron‐Nitride‐Coated Hi‐Nicalon™ SiC Fiber‐Reinforced Silicon‐Carbide‐Matrix Composite

Fabrication of SiC_f/SiC Composite by Chemical Vapor Infiltration

Carbon fiber/reaction-bonded carbide matrix for composite materials – Manufacture and characterization

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Strength of a Hi‐Nicalon™/Silicon‐Carbide‐Matrix Composite Fabricated by the Multiple Polymer Infiltration‐Pyrolysis Process

Cited by 49 publications

References 8 publications

Temperature Dependence of Tensile Strength for a Woven Boron‐Nitride‐Coated Hi‐Nicalon™ SiC Fiber‐Reinforced Silicon‐Carbide‐Matrix Composite

Temperature Dependence of Tensile Strength for a Woven Boron‐Nitride‐Coated Hi‐Nicalon™ SiC Fiber‐Reinforced Silicon‐Carbide‐Matrix Composite

Fabrication of SiCf/SiC Composite by Chemical Vapor Infiltration

Carbon fiber/reaction-bonded carbide matrix for composite materials – Manufacture and characterization

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Fabrication of SiC_f/SiC Composite by Chemical Vapor Infiltration