国产550级连续氧化铝陶瓷纤维的高温拉伸性能研究  

High Temperature Tensile Property of Domestic 550-grade Continuous Alumina Ceramic Fiber

作　　者：王新刚[1] 杨青青 林根连 高巍 秦福林 李荣臻 康庄[2] 王小飞 蒋丹宇[1] 闫继娜[2] WANG Xingang;YANG Qingqing;LIN Genlian;GAO Wei;QIN Fulin;LI Rongzhen;KANG Zhuang;WANG Xiaofei;JIANG Danyu;YAN Jina(State Key Lab of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;R&D Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050 [2]中国科学院上海硅酸盐研究所,中试基地,上海201800

出　　处：《无机材料学报》2022年第6期629-635,共7页Journal of Inorganic Materials

基　　金：上海市科委技术标准项目(18DZ2204200)。

摘　　要：氧化物陶瓷纤维具有优良的耐高温和抗氧化性能,是航空航天领域用复合材料增强相的重要候选材料。高温拉伸性能是氧化物陶瓷纤维在极端环境应用的关键评价指标之一,但相关报道较少。本工作研究了国产550级纤维的高温拉伸性能和热处理后的室温拉伸性能,探讨了纤维的拉伸性能与其物相和显微结构的演变关系和内在机理,并与Nextel 720和CeraFib纤维的高温拉伸性能进行了对比。结果表明,国产SIC550纤维复丝和单丝在1100℃以下具有相对较高的拉伸强度和拉伸强度保持率,由于纤维中无定形SiO_(2)的高温热稳定性较差,对纤维1200℃以上的高温拉伸性能产生明显不利的影响;通过在临界相转变温度(1300℃)对纤维进行热处理来形成莫来石相,可在一定程度上改善纤维在1250~1400℃的高温拉伸性能。考虑到不同标距的影响,SIC550纤维在1100℃的高温拉伸强度(883 MPa)与Nextel 720(1000 MPa)和CeraFib纤维(940 MPa)接近。Oxide fiber has good thermostability and oxidation resistance at high temperature,is one of the important candidates for the reinforcements of composites for aerospace field.The tensile property at high temperature is one of the critical properties of oxide fiber used in harsh environment,but the related research about domestic 550-grade fiber is rarely reported.Here,the tensile property of domestic 550-grade continuous alumina fiber at high temperature and its room temperature tensile property after heat treatment were studied.Relationships between the tensile strength and the phase transition,the microstructures,as well as their internal mechanism were investegated.The results showed that the fiber multifilament and filaments had relatively high tensile strength with strength retention rate up to 1100℃.The poor thermostability of amorphous SiO_(2) had obviously adverse effect on the tensile property of the fiber at temperature above 1200℃.Importantly,at the critical phase transition temperature(1300℃)mullite plase was formed,which could improve the fiber tensile strength at 1250-1400℃.This work demonstrated that the tensile strength of SIC550 fiber at 1100℃was close to that of Nextel 720 and CeraFib by considering the effect of different gauge length.

关 键 词：氧化铝 陶瓷纤维 高温拉伸性能 莫来石 

分 类 号：TQ174[化学工程—陶瓷工业]