合成纤维

2016, v.45;No.324(02) 36-39

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二硼化锆-碳化硅复相陶瓷纤维的制备与表征
Preparation and Characterization on ZrB_2-SiC Duplex Ceramic Fibers

张铭远;张晨宇;星禧;韩克清;刘勇;余木火;
ZHANG Ming-yuan;ZHANG Chen-yu;XING Xi;HAN Ke-qing;LIU Yong;YU Mu-huo;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering;

摘要(Abstract):

分别采用八水合氧氯化锆、硼酸、蔗糖、正硅酸乙酯为锆源、硼源、碳源和硅源,柠檬酸为络合剂,聚乙烯醇为纺丝助剂,通过干法纺丝制备了前驱体纤维,然后在氩气氛围下逐渐升温至1600℃并保温2 h,获得了二硼化锆-碳化硅复相陶瓷纤维。通过红外光谱、热失重分析、X射线衍射、扫描电镜等对前驱体纤维和陶瓷纤维进行了表征。结果表明:原料之间发生了相互反应,前驱体纤维具有良好的稳定性,硅源参与反应生成了碳化硅并细化了晶粒,提高了陶瓷纤维的致密度,并且使陶瓷纤维具有更好的高温抗氧化性。
In this paper, ZrOCl_2·8H_2O, boric acid, sucrose, tetraethoxysilane were used as zirconium, boron,carbon and silicon source, respectively. And the spinning solution was prepared by adding citric acid ascomplexing agent and polyvinyl alcohol as spinning auxiliary with the sources. The precursor fibersprepared by dry-spinning method were sintered at 1 600 ℃ for 2 hours in Argon to obtain ZrB_2-Si C duplexceramic fibers. The structure and properties of fibers were studied by FTIR, TGA, XRD and SEM. Theresults showed that the thermal stability of precursor fibers improved owing to the reactions among rawmaterials. The introduction of Si caused the formation of Si C during the sintering, leading to the increase inthe density and high-temperature oxidation resistance of resultant ceramic fibers.

关键词(KeyWords): 硼化锆;碳化硅;陶瓷纤维;干法纺丝
ZrB2;SiC;ceramic fiber;dry-spinning

Abstract:

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基金项目(Foundation): 上海市科委基础研究重点项目(14JCl400100);; 上海市自然科学基金资助项目(15ZR1400400);; 中央高校基本科研业务费专项资金资助项目(15D110638)

作者(Author): 张铭远;张晨宇;星禧;韩克清;刘勇;余木火;
ZHANG Ming-yuan;ZHANG Chen-yu;XING Xi;HAN Ke-qing;LIU Yong;YU Mu-huo;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering;

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