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(Hf_(0.5)Ta_(0.5))C ultra-high temperature ceramic solid solution nanowires

查看全文 作　　者：Hui [1]Chen;Yulei [1,2]Zhang;Yanqin [1]Fu;Jiachen [1]Meng;Qing [1]Miao;Jianhua [1]Zhang;Hejun [1]Li 高影响力作者 机构地区：[1]State Key Laboratory of Solidification Processing,Carbon/Carbon Composites Research Center,Northwestern Polytechnical University,Xi’an 710072,China;[2]Carbon Matrix Composites Research Institute,Henan Academy of Sciences,Zhengzhou 450046,China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2023年第16期,共11页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Nos.52130205 and 51727804);the National Key R&D Program of China(No.2021YFA0715803);Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(CX2022010). 摘　　要：Ultra-high temperature ceramic(UHTC)nanowires are potential reinforcement materials due to it combines the perfect properties of bulk materials and unique geometric properties of one-dimensional(1D)nanostructures.Thus,developing 1D nanomaterials that have excellent morphology and structure retention in ultra-high temperature environments is of prime importance to bring their outstanding performance into full play.Herein,we report the novel solid solution((Hf_(0.5)Ta_(0.5))C)ceramic nanowires,which could not only maintain morphological and structural stability at 1900°C but also exhibit 1D nanostructures under oxyacetylene scouring and ablation at 2300°C.The morphology evolution of nanowires obeys the Rayleigh instability mechanism,and the internal structure and element distribution of nanowires remain unchanged even if the surface atoms are rearranged.The fascinating nanowires are demonstrated to have great potential as ideal reinforcement materials of composite materials and toughening phases of ceramics that are applied in ultra-high temperature environments,as well as excellent performance enhancement phases of functional materials.Our work may provide new insights into the development of ceramic nanowires and widen their applications. 关 键 词：(Hf_(0.5)Ta_(0.5))C solid solution nanowires Vapor-liquid-solid mechanism Catalyst/nanowire interface High-temperature stability Ablation resistance
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