Preparation and Mechanical Properties of C/C-SiC Composites

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

doi:10.4028/0-87849-432-4.1501

Cited by 1 publication

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“…Zhang et al [9] found that the introduction of ZrC into carbon/carbon composites can effectively reduce the ablation rate of C/C composites while maintaining the excellent properties of C/C composites, and studied the formation mechanism of C/C-ZrC-Cu prepared by infiltration method with Cu. The anti-ablation principle of C/C-ZrC composites was studied [10]. ZrC added to C/C composites reacted with oxygen during ablation, and the generated ZrO 2 could block the infiltration of oxygen and reduce the ablation effect.…”

Section: Introductionmentioning

confidence: 99%

Modeling Method of C/C-ZrC Composites and Prediction of Equivalent Thermal Conductivity Tensor Based on Asymptotic Homogenization

Lyu,

Mei,

et al. 2024

Computer Modeling in Engineering &Amp; Sciences

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This article proposes a modeling method for C/C-ZrC composite materials. According to the superposition of Gaussian random field, the original gray model is obtained, and the threshold segmentation method is used to generate the C-ZrC inclusion model. Finally, the fiber structure is added to construct the microstructure of the three-phase plain weave composite. The reconstructed inclusions can meet the randomness of the shape and have a uniform distribution. Using an algorithm based on asymptotic homogenization and finite element method, the equivalent thermal conductivity prediction of the microstructure finite element model was carried out, and the influence of component volume fraction on material thermal properties was explored. The sensitivity of model parameters was studied, including the size, mesh sensitivity, Gaussian complexity, and correlation length of the RVE model, and the optimal calculation model was selected. The results indicate that the volume fraction of the inclusion phase has a significant impact on the equivalent thermal conductivity of the material. As the volume fraction of carbon fiber and ZrC increases, the equivalent thermal conductivity tensor gradually decreases. This model can be used to explore the impact of material microstructure on the results, and numerical simulations have studied the relationship between structure and performance, providing the possibility of designing microstructure based on performance.

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Section: Introductionmentioning

confidence: 99%