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以醋酸锆溶液和石油沥青为原料,通过浸渍法制备出锆掺杂C/C复合材料,并研究了其致密化规律和高温下的抗氧化性能,利用XRD和SEM分析了锆在C/C复合材料中的存在形式和分布状态。结果表明,C/C复合材料中掺杂的锆经1000℃和1600℃处理后完全转化为单斜纳米ZrO2晶体和立方纳米ZrC晶体,纳米ZrO2均匀分布于材料的基体中和碳纤维表面。1500℃下锆掺杂C/C复合材料的氧化速率仅为0.0054wt%/s,较纯C/C复合材料的抗氧化性能得到明显提升。
Zirconium acetate solution and petroleum pitch were used as raw materials to prepare zirconium-doped C / C composites by impregnation method. The densification rules and the oxidation resistance under high temperature were studied. The effects of zirconium on C / C The Existence and Distribution of Composites. The results show that zirconium doped C / C composites are completely transformed into monoclinic ZrO2 and cubic ZrC crystals after being treated at 1000 ℃ and 1600 ℃ respectively. The nanometer ZrO2 is uniformly distributed in the matrix of the material and on the surface of the carbon fiber. The oxidation rate of zirconium-doped C / C composites at 1500 ℃ is only 0.0054wt% / s, and the oxidation resistance of pure C / C composites is obviously improved.