Prediction of elastic properties of pyrolytic carbon based on orientation angle

Song, Yongshan; Qi, Lehua; Li, Y X

doi:10.1088/1757-899x/213/1/012030

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…Isotropy is assumed when elastic constants are the same for all orientation angles and the Poisson coefficient (which reflects the transverse strain response to the applied uniaxial load) is higher than 0.2 [ 120 ]. For example, pyrolytic carbon is partially isotropic: the Poisson coefficient is about 0.4 [ 121 ], but elastic properties depend on orientation angle and question the nature of isotropy in such materials. Theoretical Schwarzites structures have a Poisson coefficient ranging from 0.2 to 0.35 [ 122 ].…”

Section: Glc Properties: What Have We Learnt From Topology and Geometrymentioning

confidence: 99%

Vitreous Carbon, Geometry and Topology: A Hollistic Approach

Mélinon

2021

Nanomaterials

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Glass-like carbon (GLC) is a complex structure with astonishing properties: isotropic sp2 structure, low density and chemical robustness. Despite the expanded efforts to understand the structure, it remains little known. We review the different models and a physical route (pulsed laser deposition) based on a well controlled annealing of the native 2D/3D amorphous films. The many models all have compromises: neither all bad nor entirely satisfactory. Properties are understood in a single framework given by topological and geometrical properties. To do this, we present the basic tools of topology and geometry at a ground level for 2D surface, graphene being the best candidate to do this. With this in mind, special attention is paid to the hyperbolic geometry giving birth to triply periodic minimal surfaces. Such surfaces are the basic tools to understand the GLC network architecture. Using two theorems (the classification and the uniformisation), most of the GLC properties can be tackled at least at a heuristic level. All the properties presented can be extended to 2D materials. It is hoped that some researchers may find it useful for their experiments.

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Section: Glc Properties: What Have We Learnt From Topology and Geometrymentioning

confidence: 99%

Vitreous Carbon, Geometry and Topology: A Hollistic Approach

Mélinon

2021

Nanomaterials

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“…22 According to the extinction and orientation angles, PyC is usually divided into four types, that is, isotropic, low texture (LT), medium texture (MT), and high texture (HT). 23 Despres and Monthioux investigated the mechanical properties of C/SiC composite with different textural organization of the PyC interphase. 22 It was found that the carbon interphase texture obviously controls the macroscopic behavior of the composite.…”

Section: Introductionmentioning

confidence: 99%

Effect of pyrocarbon interphase texture and thickness on tensile damage and fracture in T‐700™ carbon fiber–reinforced silicon carbide minicomposites

Duan

Zhang

et al. 2021

J Am Ceram Soc.

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In this paper, T-700™ carbon fiber-reinforced silicon carbide (C/SiC) minicomposites with pyrocarbon (PyC) interphase with different textural microstructure and thickness were fabricated using the chemical vapor infiltration method. The interface properties (i.e., textural microstructure, thickness, hardness, and modulus) were obtained through multiple testing methods (i.e., Raman spectroscopy, X-ray diffraction, scanning electron microscopy, and nanoindentation tests). Relationships between the deposition temperature and residence time with the texture type (i.e., low, medium, and high texture) were established. Uniaxial tensile experiments were conducted for C/SiC minicomposites with different PyC interphases to characterize the composite's internal damage evolution and fracture. Relationships between the composite's tensile nonlinear damage evolution, fracture strength and strain, PyC interphase texture, and thickness were established. The composite's tensile strength and fracture strain were the highest for the C/SiC minicomposite with medium-high texture PyC interphase.For the C/SiC minicomposite with the same texture interphase, the composite's tensile strength and fracture strain were affected by the coating thickness. The higher the thickness of the coating, the lower the composite's tensile strength and fracture strain.

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Prediction of elastic properties of pyrolytic carbon based on orientation angle

Cited by 2 publications

References 12 publications

Vitreous Carbon, Geometry and Topology: A Hollistic Approach

Vitreous Carbon, Geometry and Topology: A Hollistic Approach

Effect of pyrocarbon interphase texture and thickness on tensile damage and fracture in T‐700™ carbon fiber–reinforced silicon carbide minicomposites

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