Wenguo Jiang , Yi Ru , Jundong Shi , Haozhang Hou , Zexu Sun , Weiwei Qu , Xiaotian Hu , Guoquan Ma , Lianyi Wang , Yanling Pei , Shusuo Li , Shengkai Gong
{"title":"碳化硅纤维的高温粘弹性机理,以阐明其蠕变和恢复行为","authors":"Wenguo Jiang , Yi Ru , Jundong Shi , Haozhang Hou , Zexu Sun , Weiwei Qu , Xiaotian Hu , Guoquan Ma , Lianyi Wang , Yanling Pei , Shusuo Li , Shengkai Gong","doi":"10.1016/j.matdes.2025.114755","DOIUrl":null,"url":null,"abstract":"<div><div>Mastering the high-temperature creep behavior of SiC fibers plays pivotal role in designing reinforced ceramic matrix composites. Creep viscoelastic behavior is activated at higher temperatures due to complicated interactive coordination between grain interiors and grain boundaries. This study investigated the tensile creep behaviors at different generations of SiC fibers under conditions of various stress and temperatures. The creep recovery behaviors after unloading exhibits the viscoelastic nature, which comes from the possible motion of amorphous phase near massive grain boundaries. It is driven by the release of elastic energy of the grain boundary, evidenced by frequency shifts in Raman spectroscopy. Then classical diffusion creep theory is modified to a viscoelastic model incorporating physical parameters such as the elasticity, viscosity, and threshold stress for SiC fibers. The proposed equations have been well supported by creep test results. The viscosity and elasticity parameters decrease with increasing temperature, the latter being more sensitive. 3rd generation fiber exhibits higher viscosity and elasticity, explaining better creep resistance. The model can evaluate the elastic and plastic contributions and predict creep results at higher temperatures. This work helps to understand high-temperature SiC fiber creep, and to guide optimizing fiber-reinforced composites.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114755"},"PeriodicalIF":7.9000,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-temperature viscoelastic mechanism for SiC fibers to elucidate creep and recovery behaviors\",\"authors\":\"Wenguo Jiang , Yi Ru , Jundong Shi , Haozhang Hou , Zexu Sun , Weiwei Qu , Xiaotian Hu , Guoquan Ma , Lianyi Wang , Yanling Pei , Shusuo Li , Shengkai Gong\",\"doi\":\"10.1016/j.matdes.2025.114755\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Mastering the high-temperature creep behavior of SiC fibers plays pivotal role in designing reinforced ceramic matrix composites. Creep viscoelastic behavior is activated at higher temperatures due to complicated interactive coordination between grain interiors and grain boundaries. This study investigated the tensile creep behaviors at different generations of SiC fibers under conditions of various stress and temperatures. The creep recovery behaviors after unloading exhibits the viscoelastic nature, which comes from the possible motion of amorphous phase near massive grain boundaries. It is driven by the release of elastic energy of the grain boundary, evidenced by frequency shifts in Raman spectroscopy. Then classical diffusion creep theory is modified to a viscoelastic model incorporating physical parameters such as the elasticity, viscosity, and threshold stress for SiC fibers. The proposed equations have been well supported by creep test results. The viscosity and elasticity parameters decrease with increasing temperature, the latter being more sensitive. 3rd generation fiber exhibits higher viscosity and elasticity, explaining better creep resistance. The model can evaluate the elastic and plastic contributions and predict creep results at higher temperatures. This work helps to understand high-temperature SiC fiber creep, and to guide optimizing fiber-reinforced composites.</div></div>\",\"PeriodicalId\":383,\"journal\":{\"name\":\"Materials & Design\",\"volume\":\"259 \",\"pages\":\"Article 114755\"},\"PeriodicalIF\":7.9000,\"publicationDate\":\"2025-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials & Design\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S026412752501175X\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials & Design","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S026412752501175X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
High-temperature viscoelastic mechanism for SiC fibers to elucidate creep and recovery behaviors
Mastering the high-temperature creep behavior of SiC fibers plays pivotal role in designing reinforced ceramic matrix composites. Creep viscoelastic behavior is activated at higher temperatures due to complicated interactive coordination between grain interiors and grain boundaries. This study investigated the tensile creep behaviors at different generations of SiC fibers under conditions of various stress and temperatures. The creep recovery behaviors after unloading exhibits the viscoelastic nature, which comes from the possible motion of amorphous phase near massive grain boundaries. It is driven by the release of elastic energy of the grain boundary, evidenced by frequency shifts in Raman spectroscopy. Then classical diffusion creep theory is modified to a viscoelastic model incorporating physical parameters such as the elasticity, viscosity, and threshold stress for SiC fibers. The proposed equations have been well supported by creep test results. The viscosity and elasticity parameters decrease with increasing temperature, the latter being more sensitive. 3rd generation fiber exhibits higher viscosity and elasticity, explaining better creep resistance. The model can evaluate the elastic and plastic contributions and predict creep results at higher temperatures. This work helps to understand high-temperature SiC fiber creep, and to guide optimizing fiber-reinforced composites.
期刊介绍:
Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry.
The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.