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热喷涂技术:2021,13(1):22-32
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C/C 复合材料表面 ZrB2 基陶瓷涂层改性及抗氧化性能研究
(1.大连理工大学材料科学与工程学院 辽宁省载能束冶金及先进材料制备重点实验室;2.中国科学院长春应用化学研究所 稀土资源利用国家重点实验室)
Study on Modifcation and Anti-oxidation Performance of ZrB2-Based Ceramic Coating on C/C Composites
(1.School of Materials Science and Engineering, Dalian University of Technology,Key Laboratory of Energy-bearing Beam Metallurgy and Advanced Materials Preparation of Liaoning Province;2.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,State Key Laboratory of Rare Earth Resources Utilization)
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中文摘要: 为了提升碳/碳 (C/C) 复合材料的抗氧化性能, 通过大气等离子喷涂技术在 C/C-SiC 复合材料表面制备了添 加剂改性的 ZrB2 陶瓷涂层, 分别为 ZrB2-SiC、 ZrB2-TiB2 涂层, 对涂层样品进行 1200 ℃ 的氧化性能测试。 结果 表明, 氧化 5 h 后, ZrB2-SiC 涂层仍有 2.62 wt.% 增重量, 与 ZrB2 涂层相比(氧化失重率为 10.76 wt.%) , ZrB2- SiC 涂层抗氧化性能大幅度提升, 主要由于 SiC 的添加降低了涂层热膨胀系数, 缓解热失配, 提升了涂层结合强 度, 而且氧化后形成致密的硼硅酸盐熔融玻璃表面, 填充了涂层裂缝、 孔洞, 为基材提供更为优异的抗氧化防护。 而 ZrB2-TiB2 涂层表现出较差的抗氧化性, 氧化 5 h 后, 失重量达到 18.76 wt.%, ZrB2-TiB2 涂层极差的抗氧化性 是因为 TiB2 的引入改变了涂层的形貌, 氧化后形成疏松多孔的组织结构, 无法有效隔绝氧气。
Abstract:In order to improve the oxidation resistance of carbon/carbon (C/C) composites, ZrB2 ceramic coatings modified by additives (ZrB2-SiC and ZrB2-TiB2 coating respectively) were prepared on the surface of C/C-SiC composites by atmospheric plasma spraying technology. The oxidation test of the coating samples were conducted at 1200℃ . The results show that after 5 hours of oxidation, the ZrB2-SiC coating still increased by 2.62 wt.% in weight. Compared with the ZrB2 coating (with 10.76 wt.% of oxidation weight loss rate), the oxidation resistance of the ZrB2-SiC coating has been greatly improved, which may due to the following two reasons. For one thing, the addition of SiC reduces the thermal expansion coefficient of the coating and alleviates the thermal mismatch, thus improving the bonding strength of the coating. For another, a dense borosilicate molten glass surface is formed after oxidation, which fills the coating cracks and holes, and the oxidation resistance of the substrates has been improved significantly. While the ZrB2-TiB2 coating showed poor oxidation resistance. After 5 hours of oxidation, the weight loss reached 18.76 wt.%. The ZrB2-TiB2 coating exhibited extremely poor oxidation resistance due to the introduction of TiB2, which changed the structure of the coating. As a result, a loose and porous structure is formed after oxidation and unable to isolate oxygen effectively
文章编号:     中图分类号:TG174.4    文献标志码:
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引用文本:
刘雨蒙,郝建洁,李佳艳,谭毅,邹兵林,蔡晓龙.C/C 复合材料表面 ZrB2 基陶瓷涂层改性及抗氧化性能研究[J].热喷涂技术,2021,13(1):22-32.
Liu Yumeng,Hao Jianjie,Li jiayan,Tan Yi,Zou Binglin,Cai Xiaolong.Study on Modifcation and Anti-oxidation Performance of ZrB2-Based Ceramic Coating on C/C Composites[J].Thermal Spray Technology,202113(1):22-32.

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