Preparation and Mechanical Properties of C/C-SiC Composites

Zhu, Dong Mei; Du, Hong Na; Luo, Fa; Zhou, Wan Cheng

doi:10.4028/www.scientific.net/msf.546-549.1501

Cited by 10 publications

(6 citation statements)

References 10 publications

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“…where k % 0.75 for a Berkovich indenter [27]. Again, the contact stiffness (S) which is the slope of the first $1/3rd linear part recorded during the unloading cycle of the load versus depth of penetration plot can be expressed as [28] S ¼ dP dh…”

Section: Basic Theory Of Nanoindentationmentioning

confidence: 99%

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Dey

Mukhopadhyay

Gangadhaŕan

et al. 2009

Ceramics International

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Section: Basic Theory Of Nanoindentationmentioning

confidence: 99%

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Dey

Mukhopadhyay

Gangadhaŕan

et al. 2009

Ceramics International

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“…Previous studies demonstrated that the shear strength of SiC along the (100) direction declined as the decrease of Si/C ratio based on the first principles [12]. The experimental results manifested that the cleanliness of SiC grain boundaries declined with the decreased Si/C ratio due to the precipitation of free carbon [13]. Furthermore, the flexural strength of C/C-SiC composites also showed an increasing and then decreasing trend with the decreased Si/C ratio in SiC matrix [14].…”

Section: Introductionmentioning

confidence: 80%

Controlling the Si/C ratio in SiC matrix based on the modified polymethysilane for C/C–SiC composites with enhanced mechanical properties

Liao,

Hu,

Zhong

et al. 2024

Journal of Advanced Ceramics

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Fabricating SiC matrix with controllable Si/C ratio for C/C-SiC composites via precursor infiltration and pyrolysis is difficult to realize due to the absence of suitable precursors. Here, SiC precursors with Si-rich (Si/C = 1.23), nearstoichiometric (Si/C = 1.01), and C-rich (Si/C = 0.88) pyrolyzed ceramics at 1200 ℃ were successfully synthesized by the novel modification of polymethysilane. The structure and ceramization of synthesized SiC precursors were studied, and C/C-SiC composites with similar Si/C ratio in SiC matrix were also fabricated. The results revealed that the defects and Young's modulus of SiC matrix and the thermal residual stress on pyrolytic carbon coated carbon fiber were determined by the Si/C ratio. As a result, the Si/C ratio exerted significant effects on the crack deflection behavior and the mechanical properties of the composites. The composites with near-stoichiometric SiC matrix showed excellent mechanical properties because of the effective crack deflection and the moderate Young's modulus of their SiC matrix. The flexural strength, flexural modulus, and compressive strength were 423±27 MPa, 33.41±4.52 GPa, and 393±8 MPa, respectively. Meanwhile, after a heat treatment at 1600 ℃, the role of carbon fiber toughening was improved and accompanied by a decrease in mechanical properties for all composites, which was attributed to the increased defects in SiC matrix and the damaged interfaces by the thermal residual stress.

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“…3 The impurities on the surface of fiber were removed after the alkali treatment, and the surface became smooth after the fiber treated by silane coupling agent. 4 Subramanya et al 5 conducted the alkali treatment on banana fiber could remove impurities on the surface of banana fiber, and improve the interaction between fiber and cassava starch. Therefore, the surface property of sisal fiber could play an important role in the mechanical and thermal properties of polymer composite and need further research.…”

Section: Introductionmentioning

confidence: 99%

Tensile creep behavior and structures of sisal fiber reinforced styrene butadiene thermoplastic elastomer/polystyrene composites

Liu,

Liao,

Liang

et al. 2023

Journal of Elastomers & Plastics

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Styrene butadiene thermoplastic elastomer (SBS)/polystyrene (PS)/sisal fiber (SF) composites were prepared by melt-blending method. The tensile creep behavior of SBS/PS/SF composites was studied and fitted by four viscoelastic models including Findley, Burger, generalized Kelvin-Voigt and Maxwell models. The effects of content and surface properties of SF treated by alkali and silane coupling agent on the creep behavior, structures and thermal properties of the composites under the action of tensile stress were investigated. The results indicated that the generalized Kelvin-Voigt model and generalized Maxwell model could best fit the tensile creep behavior of SBS/PS/SF composites. The creep resistance and thermal stability of the composites improved with the increases of SF content and tensile stress. The interfacial properties of fiber and matrix were enhanced after SF treated by silane, which would be beneficial to the improvements of the creep resistance and thermal stability. The glass transition temperature of the composite increased with the increase of SF content, but decreased after the action of the tensile stress.

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Preparation and Mechanical Properties of C/C-SiC Composites

Cited by 10 publications

References 10 publications

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Controlling the Si/C ratio in SiC matrix based on the modified polymethysilane for C/C–SiC composites with enhanced mechanical properties

Tensile creep behavior and structures of sisal fiber reinforced styrene butadiene thermoplastic elastomer/polystyrene composites

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