Abstract In this paper, ZrB2–ZrC composite nanofibers were prepared by electrospinning method followed by carbothermal reduction process. Nanofibers with ZrC content of 15, 35 and 50 wt%, respectively, were obtained by varying the n(B)/n(Zr) molar ratio. The oxidation resistance of fabricated nanofibers was investigated by the non-isothermal thermogravimetric method. The effect of ZrC content on the oxidation resistance of ZrB2–ZrC composite nanofibers was analyzed systematically. The Kissinger method was used to calculate the oxidative activation energy (E) of the fibers with different ZrC content. The results show that the E values of fiber with n(B)/n(Zr) equal to 2.5, 3.5 and 4 are 219, 362 and 275 kJ/mol. Among the prepared fibers, the fiber with n(B)/n(Zr) of 3.5 has the highest oxidative activation energy and the best oxidation resistance.

中文翻译：

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静电纺丝和碳热还原制备的 ZrB2-ZrC 复合纳米纤维的氧化行为

摘要 本文采用静电纺丝法和碳热还原法制备了ZrB2-ZrC复合纳米纤维。通过改变 n(B)/n(Zr) 摩尔比获得 ZrC 含量分别为 15、35 和 50 wt% 的纳米纤维。通过非等温热重法研究了制备的纳米纤维的抗氧化性。系统分析了ZrC含量对ZrB2-ZrC复合纳米纤维抗氧化性的影响。采用 Kissinger 方法计算不同 ZrC 含量的纤维的氧化活化能 (E)。结果表明，n(B)/n(Zr)等于2.5、3.5和4的纤维的E值分别为219、362和275 kJ/mol。在制备的纤维中，n(B)/n(Zr)为3.5的纤维具有最高的氧化活化能和最好的抗氧化性。