检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:李陇彬 薛玉冬 胡建宝[1,2] 杨金山 张翔宇[1,2] 董绍明 LI Longbin;XUE Yudong;HU Jianbao;YANG Jinshan;ZHANG Xiangyu;DONG Shaoming(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)
机构地区:[1]中国科学院上海硅酸盐研究所,高性能陶瓷和超精密微结构国家重点实验室,上海200050 [2]中国科学院大学材料与光电研究中心,北京100049
出 处:《无机材料学报》2021年第10期1111-1117,共7页Journal of Inorganic Materials
基 金:National Science and Technology Major Project(2017-IV-0005-0042);Key Research Program of Frontier Science,Chinese Academy of Sciences(QYZDY-SSW-JSC031)。
摘 要:通过在碳化硅纤维表面原位生长纳米线得到具有多级增强结构的碳化硅复合材料,对复合材料引入纳米线后的微观结构、弯曲强度以及损伤的变化过程进行了研究。研究结果表明,相较于原始的碳化硅纤维增强碳化硅复合材料,碳化硅纳米线可以明显提高基体沉积效率并改善材料的弯曲力学性能。从声发射技术和维氏硬度压痕测试结果可以看出,纳米线通过抑制微裂纹的产生和在微裂纹之间发生桥联来抑制早期损伤的发展。此外,在纳米线表面沉积一层氮化硼界面相,纳米线与基体之间的结合力变弱,复合材料对微裂纹的抑制和偏转得到进一步增强,弯曲性能大幅提升。SiC fiber(SiC_(f))/SiC composites were modified by SiC nanowires(SiCnw)grown in-situ on SiC fiber to obtain hierarchical structure.Effects of this hierarchical structure on the properties of composites,such as microstructure,fracture strength and damage evolution,were evaluated.Results show that the introduction of SiC_(nw)significantly improves the matrix infiltration efficiency.SiC_(nw)and BN-coated SiC_(nw)reinforced SiC_(f)/SiC composites acquire better performance in bending tests by comparison with conventional SiC_(f)/SiC.SiC_(nw)coated by BN interphase obviously enhances the strength owing to weak-bonded interface.Besides,results of acoustic emission and Coated Vickers Hardness Impresses reveal that SiC_(nw)delay early damage evolution at early state and mainly make contribution to hindering and bridging of microcracks,which is further enhanced by BN-coated SiCnw.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.222