Characterization and modeling of tensile properties of continuous fiber reinforced C/C-SiC composite at high temperatures

Self Cite

Due to its excellent mechanical properties, favorable damage tolerance and comparatively low density, continuous carbon fiber reinforced carbon silicon carbide (C/C-SiC) composite fabricated by Liquid Silicon Infiltration (LSI) process has been successfully used in aerospace, energy, and transport technology. [1][2][3][4][5][6][7][8] The preliminary investigation of siliconization in German Aerospace Center Stuttgart started in the late 1980s and the manufacturing process of LSI-based C/C-SiC was developed in the beginning of 2000s. 9 Since then, material properties of the composite have been characterized intensively. The in-plane and out-of-plane mechanical properties under different loads, thermal properties and the effect of high temperature were investigated and summarized in Ref. [10] The strength ratio between bending and tensile load was approx. 1.7-2.0 depending on the different loading directions. 11 The acoustic emission (AE) technique has been used for the determining the relationship between its tensile strength and damage-related AE energy. 12 Based on the statistical analysis, strength values under tensile, compression and bending loads can be described using normal or Weibull

“…Similar to elastic values, the strength

σ_{x}

is equal to

σ_{y}

σ_{1}

σ_{2}

and ultimate strain

ε_{x}

ε_{y}

ε_{1}

ε_{2}

Section: Resultsmentioning

confidence: 99%

Section: A B L E 1 Specimen Geometry With Dimensions (Thickness Of 3 Mm) Loading Direction For Different Mechanical Tests and The Associamentioning

confidence: 99%

Experimental evaluation and theoretical prediction of elastic properties and failure of C/C‐SiC composite

Sitnikova

Cepli

et al. 2021

Self Cite

“…State of the art is the use of commercially available fabrics to manufacture complex shaped CMC components with low porosity in one cycle, providing moderate strength materials, or even lower performance materials based on short fibres applied on cost-efficient components where low strength can be accepted [15][16][17][18] . Characterisation of C/C-SiC composites with respect to thermal and mechanical properties were investigated under different loads and are summarized in 7,[19][20][21][22] .…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17][18] Characterization of C/C-SiC composites with respect to thermal and mechanical properties was investigated under different loads and are summarized in previous studies. 7,[19][20][21][22] behavior and the ceramic propert larly in the Sejnène region, northw the chemical composition, these c terized by high iron contents who of the ceramic materials is well k of fluxing agents as alkali and alk are necessary for low temperatur considered materials consist entir containing impurities, mostly ill iron, which serve as fluxing agen at low temperature [3][4][5][6] and appeare physical and mechanical propertie ramic materials.…”

Section: Introductionmentioning

confidence: 99%

Manufacture and thermomechanical characterization of wet filament wound C/C‐SiC composites

Frieß

Böyükbas

Vogel

et al. 2021

Self Cite

The paper presents manufacture of C/C-SiC composite materials by wet filament winding of C-fibres with a water based phenolic resin with subsequent curing via autoclave as well as pyrolysis and liquid silicon infiltration (LSI). Almost dense C/C-SiC composite materials with different winding angles ranging from ±15° to ±75° could be obtained with porosities lower than 3% and densities in the range of 2 g/cm³. Thermomechanical characterization via tensile testing at room temperature and at 1300 °C revealed higher tensile strength at elevated temperature than at room temperature. Thus, C/C-SiC material obtained by wet filament winding and LSIprocessing has excellent high temperature strength for high temperature applications.Crack patterns during pyrolysis, microstructure after siliconisation and tensile strength strongly depend on the fibre/matrix interface strength and winding angle. Moreover, calculation tools for composites, such as classical laminate and inverse laminate theory can be applied for structural evaluation and prediction of mechanical performance of C/C-SiC structures.

“…Continuous carbon fiber‐reinforced carbon and silicon carbide dual matrix composite (C/C–SiC) is one of the typical thermo‐structural materials because of its low weight, high specific strength/modulus, good oxidation resistance, and excellent thermal stability. Therefore, the C/C–SiC composite has received considerable attention for the application in extreme environments, such as advanced tribological and thermal protection systems 1–5 …”

Section: Introductionmentioning

confidence: 99%

Role of fiber–matrix adhesion at CFRP stage on microstructure and mechanical properties of C/C–SiC composite

Dai

Zhang²,

et al. 2021

In order to understand the role of fiber–matrix adhesion (FMA) at carbon fiber‐reinforced polymer (CFRP) stage on the microstructure and mechanical properties of C/C–SiC composite via liquid silicon infiltration (LSI) process, the FMA was adjusted by thermal treatment of carbon fibers at different temperatures and evaluated by means of single fiber push‐out technique. The microstructure was characterized by optical microscopy and scanning electron microscopy. The mechanical properties were measured by the double‐notched shear test, three‐point flexural test, and single edge‐notched beam test, respectively. Results indicated that the microstructure and mechanical properties of C/C–SiC composite via LSI were closely associated with the FMA at CFRP stage. The microstructure of C/C–SiC composite fabricated by using the CFRP with high FMA presented nonhomogeneous distribution and concentration of SiC matrix. In contrast, the C/C–SiC composite fabricated by using the CFRP with low FMA, the high content of SiC distributed homogeneously and surrounded the fiber, which resulted in a strong bonded C–SiC interface. The strong C–SiC interface is detrimental to the fracture toughness, but it is beneficial to the improvement of oxidation resistance. To obtain desired mechanical properties of C/C–SiC composite, the control of interface bonding is important, which can be realized by modifying the FMA at CFRP stage.