Thermo-mechanical properties and microstructure of silicon carbide composites fabricated by nano-infiltrated transient eutectoid process

Katoh, Yutai; Dong, Shaoming; Kohyama, Akira

doi:10.1016/s0920-3796(02)00180-1

Cited by 128 publications

(55 citation statements)

References 6 publications

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“…A recent study revealed the width effect on tensile strength of various types of SiC/SiC composites. 24) In that report, a three directionally woven TyrannoÔ-SA fiber reinforced composite made by the modified PIP process 25) and a cross-plied TyrannoÔ-SA fiber reinforced laminate composite made by the nano-infiltration transient eutectic phase (NITE) process 26,27) were evaluated. Both composites featured a highly crystalline and near stoichiometric SiC matrix.…”

Section: Generality Of Specimen Size Effectmentioning

confidence: 99%

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Nozawa

Katoh

2005

Mater. Trans.

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Mechanical testing after neutron irradiation is a critical research tool for evaluating materials for fusion systems, such as silicon carbide fiber silicon carbide matrix (SiC/SiC) composites. However, single-axis tensile testing, which is required to build a fundamental database, requires large specimens. Therefore miniaturization of tensile test specimens has long been pursued as a method to reduce the irradiation volume to fit the capsule size limitation. The objective of this study is to identify specimen size effects on tensile properties of SiC/SiC composites from the viewpoints of the influences of fabric architecture and tensile loading axis, with a final goal to establish a small specimen test technique for tensile testing of the composites. The axial fiber volume fraction plays an important role in achieving good tensile properties. However the size dependent change of the axial fiber volume fraction gives specimen size effect. The composites with much fiber volume content tended to have superior tensile strength, elastic modulus and proportional limit stress. Contrarily, the tensile properties of the composites with the same axial fiber volume fraction were almost independent of the specimen size. This type of size effect is generally common in any types of architecture. The size-relevant fracture mode in off-axis tension: detachment in shorter widths vs. in-plane shear at larger widths, also gives specimen size effect on tensile properties, resulting in strict limitation of miniaturization of the tensile specimen. Finally we proposed a miniature tensile specimen for the composites.

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Section: Generality Of Specimen Size Effectmentioning

confidence: 99%

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Nozawa

Katoh

2005

Mater. Trans.

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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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“…As discussed, the matrix of this fuel is based on the NITE formulation of SiC that was developed as an irradiation-stable SiC matrix for composites (Katoh et al, 2002). However, the applications and irradiation database for which SiC composites and NITE ceramics enjoy are primarily in the 600-1200°C range and relatively limited.…”

Section: Properties and Irradiation Testmentioning

confidence: 99%

Fully Ceramic Microencapsulated (FCM) Replacement Fuel for LWRs

Powers¹,

Lee

Venneri

et al. 2013

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Thermo-mechanical properties and microstructure of silicon carbide composites fabricated by nano-infiltrated transient eutectoid process

Cited by 128 publications

References 6 publications

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Fabrication of SiC_f/SiC Composite by Chemical Vapor Infiltration

Fully Ceramic Microencapsulated (FCM) Replacement Fuel for LWRs

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Thermo-mechanical properties and microstructure of silicon carbide composites fabricated by nano-infiltrated transient eutectoid process

Cited by 128 publications

References 6 publications

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Evaluation of Tensile Properties of SiC/SiC Composites with Miniaturized Specimens

Fabrication of SiCf/SiC Composite by Chemical Vapor Infiltration

Fully Ceramic Microencapsulated (FCM) Replacement Fuel for LWRs

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Product

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Fabrication of SiC_f/SiC Composite by Chemical Vapor Infiltration