Fabrication of ZrB2-ZrC composite nanofibers with eutectic composition by electrospinning and carbothermal reduction

Fabrication of ZrB2-ZrC composite nanofibers with eutectic composition by electrospinning and carbothermal reduction
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静电纺丝和碳热还原法制备共晶 ZrB2-ZrC 复合纳米纤维

DOI:
10.1016/j.matlet.2018.07.126
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发表时间:
2018-11
期刊:
影响因子:
3
通讯作者:
Tang Yufei
Tang Yufei
中科院分区:
材料科学3区
文献类型:
--
作者:
Li Fuping;Xu Zhuoli;Zhao Kang;Tang Yufei

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ZrC的加入有利于提高ZrB 2的断裂韧性。本文采用静电纺丝和碳热还原法制备了具有共晶成分的ZrB_2-ZrC复合纳米纤维。静电纺丝法制备的前驱体表面光滑均匀。ZrB_2-ZrC复合纳米纤维可以通过在氩气中在1300 °C下热处理前驱体来制备。热处理温度影响纳米纤维的晶体结构和晶粒尺寸。ZrB 2-ZrC复合纳米纤维的直径约为250 nm。纳米纤维中ZrB 2与ZrC的摩尔比为47:53,非常接近ZrB 2-ZrC复合材料的共晶组成。一些无定形碳存在于纳米纤维中。分析了热处理温度对非晶碳含量的影响。对ZrB 2和ZrC纳米颗粒之间的界面进行了表征。
Addition of ZrC to ZrB2is favored to improve the fracture toughness of ZrB2. In this paper, ZrB2-ZrC composite nanofibers with eutectic composition are fabricated by electrospinning and carbothermal reduction. The precursors prepared by electrospinning are smooth and uniform. ZrB2-ZrC composite nanofibers could be fabricated by heat-treatment of precursors at 1300 °C in argon. Heat-treatment temperature influences the crystalline structure and grain size of nanofibers. The diameter of ZrB2-ZrC composite nanofibers is about 250 nm. The mole ratio of ZrB2and ZrC in the nanofibers is 47:53, very close to the eutectic composition of ZrB2-ZrC composites. Some amorphous carbon is present in the nanofibers. The effect of heat-treatment temperature on amorphous carbon content is analyzed. The interface between ZrB2and ZrC nano-grains is characterized.
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