Understanding fiber preform effects on tensile strengths of SiC/SiC composites prepared by chemical vapor infiltration based on a unified fiber bundle bending view
{"title":"Understanding fiber preform effects on tensile strengths of SiC/SiC composites prepared by chemical vapor infiltration based on a unified fiber bundle bending view","authors":"","doi":"10.1016/j.matchar.2024.114341","DOIUrl":null,"url":null,"abstract":"<div><p>SiC/SiC composites are internationally recognized as viable thermal structural materials. Grasping the strength and the complex failure mechanisms is fundamental to comprehend their mechanical behaviors. Three types of SiC fibers and four weaving architectures were employed to fabricate eight types of preform, and the SiC/SiC composites were prepared by the chemical vapor infiltration. The microstructures were analysed by Computed Tomography imaging combined with intelligent recognition, mainly the weaving architectures and pores. Cracks in multi-layered SiC matrix exhibit periodic characteristics during propagation, enabling the theoretical in-situ strength of the fiber bundle SiC/SiC units. An empirical strength formula was established, which considered factors such as fiber bending, fiber orientation, proportion of fibers in longitudinal direction, and porosity. The deviation of the predicted strength from the actual value ranged from 0.78 % to 29.51 %. A unified fiber bundle bending view to understanding fiber preform effects on tensile strengths of SiC/SiC was introduced.</p></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Characterization","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1044580324007228","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
引用次数: 0
Abstract
SiC/SiC composites are internationally recognized as viable thermal structural materials. Grasping the strength and the complex failure mechanisms is fundamental to comprehend their mechanical behaviors. Three types of SiC fibers and four weaving architectures were employed to fabricate eight types of preform, and the SiC/SiC composites were prepared by the chemical vapor infiltration. The microstructures were analysed by Computed Tomography imaging combined with intelligent recognition, mainly the weaving architectures and pores. Cracks in multi-layered SiC matrix exhibit periodic characteristics during propagation, enabling the theoretical in-situ strength of the fiber bundle SiC/SiC units. An empirical strength formula was established, which considered factors such as fiber bending, fiber orientation, proportion of fibers in longitudinal direction, and porosity. The deviation of the predicted strength from the actual value ranged from 0.78 % to 29.51 %. A unified fiber bundle bending view to understanding fiber preform effects on tensile strengths of SiC/SiC was introduced.
期刊介绍:
Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials.
The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal.
The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include:
Metals & Alloys
Ceramics
Nanomaterials
Biomedical materials
Optical materials
Composites
Natural Materials.