DataVXComposite InterfacesPaper
journal article·2023-01-02

Molecular dynamics simulation of the temperature effect on ideal mechanical properties of SiC/BN interface for SiCf/SiC composites

Jie Lu, Jianzhang Li, Xianghua Zhang, Kang Guan, Pinggen Rao, Cheng Peng, Qingfeng Zeng, Yongsheng Liu, Ning Dong, Jiantao Liu, Zhiqiang Feng

Composite Interfaces· Volume 30· Issue 1
Publisher page
Source abstract

Abstract

Interfacial strength plays a significant role in the mechanical properties of SiCf/SiC composites. The understanding of the micro-mechanisms of interfacial strength on mechanical properties at different temperature is important in application of SiCf/SiC composite. In the present work, the interfacial properties of ideal tensile strength and fracture toughness of SiC/BN interface at different temperature were studied based on molecular dynamics. It is revealed that the interfacial strength of Case Si (Si-terminated SiC/BN interface) decreases with the increase of temperature, resulting in the decrease of tensile strength and fracture toughness, while the interfacial strength of Case C (C-terminated SiC/BN interface) basically remains unchanged; so the interfacial properties of Case C are less affected by temperature. This phenomenon is well explained in terms of stress distribution and interface bonding number. Our results provide a good theoretical explanation for the high-temperature service performance of ceramic matrix composites.
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Research context

Ceramics & glassesComposites

OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Advanced Surface Polishing Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, China

National Engineering Research Center of Ceramic Matrix Composite Manufacture Technology, Xi’an, Shaanxi, China

Northwest Institute of Nuclear Technology, Xi’an, Shaanxi, China

Science and Technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, Shaanxi, China

MSEA International Institute for Materials Genome, Gu’an, Hebei, China

School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China

Mechanics and Energetics Laboratory, Evry University, Paris, France

Funding

National Natural Science Foundation of China · Project of National Engineering Research Center of Ceramic Matrix Composite Manufacture Technology · Science and Technology Planning Project of Guangdong Province

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