Fiber ceramic structures based on liquid impregnation technique

Krenkel, Walter; Schanz, P.

doi:10.1016/0094-5765(92)90021-a

Cited by 17 publications

(7 citation statements)

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“…Currently, the liquid silicon infiltration (LSI) has proved to be one of the fully-developed methods to manufacture high performance C/C-SiC with a high efficiency and relatively low cost since 1990s [1][2][3]. The plain-weave carbon fabric, as one of the most common architectures of fibers, is widely applied for C/C-SiC composites (2D C/C-SiC) [4].…”

Section: Introductionmentioning

confidence: 99%

Strength evolution of cyclic loaded LSI-based C/C-SiC composites

Xiao

et al. 2016

Ceramics International

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An experimental investigation was performed to study the influence of fatigue damage introduced by different loading cycles on the residual tensile strength (RTS) of plainweave reinforced C f /C-SiC composites (2D C/C-SiC). The specimens were subjected to the fatigue stress of 57 MPa for the preselected numbers of cycles as follows: 10 2 , 10 4 and 10 5 , respectively, before the static tensile test. The microstructures and fractured surfaces after the tensile test were examined by optical and scanning electron microscopy, respectively. The results showed that the RTS of the specimens after the preselected fatigue cycles numbers of 10 2 , 10 4 and 10 5 increase to 89.8, 94.1 and 82.4 MPa, respectively, which are somewhat higher compared to the virgin samples (79.7 MPa).Additionally, we found that the linear part of the tensile stress-strain curve is independent on the fatigue cycles. Finally, the increased fatigue damage in C/C-SiC composites could determine a reduction of elastic modulus in all cases of fatigue tests.

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Section: Introductionmentioning

confidence: 99%

Strength evolution of cyclic loaded LSI-based C/C-SiC composites

Xiao

et al. 2016

Ceramics International

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“…The silicon reacts with the carbon to silicon carbide in the area of the cracks. A dense heterogeneous C/C-SiC composite with intact C/C segments surrounded by silicon carbide and residual silicon is formed [5], [6], [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mechanical Properties and Failure Behaviour of CFRP, C/C and C/C-SiC Materials Fabricated by the Liquid-Silicon Infiltration Process in Dependence on the Matrix Chemistry

Wielage

Nestler

Roder

2011

Integrated Systems, Design and Technology 2010

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Abstract. Fibre-reinforced ceramics have a higher fracture toughness compared to monolithic ceramics. Therefore, they are an attractive material for lightweight structural components in high-temperature applications. The liquid-silicon infiltration (LSI) process is a cost-efficient manufacturing route for fibre-reinforced ceramics consisting of three processing steps. A carbon-fibre-reinforced plastic (CFRP) composite is fabricated, which is converted in a porous C/C composite by pyrolysis. Liquid silicon is infiltrated to form a dense C/C-SiC composite. The performance of the composites strongly depends on the raw materials. The matrix chemistry in particular plays a key role in developing composites with tailored functional properties. The aim of this work is to investigate the mechanical properties and the failure behaviour of CFRP, C/C and C/C-SiC composites in dependence on the matrix chemistry. The composites are fabricated by the liquid-silicon infiltration process. Different phenolic resins as matrix polymers are used. The mechanical properties are characterized by bending tests and the failure behaviour is observed in-situ. Additionally, microstructural and fractrographic analyses are done. It can be shown that the formation of the microstructure and therefore the mechanical properties and the failure behaviour are strongly influenced by the matrix chemistry over all processing steps.

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“…Figure 1 displays schemes of the conventional vacuum/pressure casting (termed press casting) and the modified process termed deform casting. 6 Infiltration of the aqueous slurry containing SiC particles (A-10, H. C. Starck, Goslar, Germany, irregular shape, d 50 : 0.51 mm, oxygen content: 0.9 wt%) into the stacked woven fabrics was mainly performed by applied pressure and capillary force. The uniqueness of the modified technique is the application of a mold with a deformable foil at the bottom.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Fiber‐Reinforced Ceramic Composites by the Modified Slurry Infiltration Technique

Lee

Weinmann

Aldinger

2007

Journal of the American Ceramic Society

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A new technique for the homogeneous infiltration of concentrated and viscous ceramic filler slurries into stacked 2D‐woven fabrics has been developed by introducing a flexible mold. The inner space of the mold expanded during slurry infiltration, which enhanced penetration of the viscous slurry into the woven fabric layers. The subsequent precursor impregnation and pyrolysis process yielded fiber‐reinforced ceramic composites with scarce macropores between the fabric layers.

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Fiber ceramic structures based on liquid impregnation technique

Cited by 17 publications

References 0 publications

Strength evolution of cyclic loaded LSI-based C/C-SiC composites

Strength evolution of cyclic loaded LSI-based C/C-SiC composites

Investigation of Mechanical Properties and Failure Behaviour of CFRP, C/C and C/C-SiC Materials Fabricated by the Liquid-Silicon Infiltration Process in Dependence on the Matrix Chemistry

Fabrication of Fiber‐Reinforced Ceramic Composites by the Modified Slurry Infiltration Technique

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