CeO2掺杂对碳碳复合材料上HfB2-SiC涂层抗氧化性能的增强作用
Improving the oxidation resistance of HfB2-SiC coatings on carbon/carbon composites by CeO2 doping
摘要
Abstract
To improve the oxidation resistance of HfB2-SiC coatings on carbon/carbon composites at 1700℃ in air,CeO2 was introduced to im-prove oxygen blocking and its mechanism was investigated.During the rapid oxidation stage,CeO2 accelerated the formation of a multiphase glass layer on the coating surface.The maximum oxidation rates of CeO2-HfB2-SiC coatings with 1%,3%,and 5%CeO2 were 24.1%,20.3%,and 53.2%higher than that of the unmodified HfB2-SiC coating,respectively.In the stable oxidation stage,the maximum oxidation rates of coatings with 1%and 3%CeO2 decreased by 31.4%and 21.9%,respectively,demonstrating adequate inert protection.CeO2 is a"coagulant"and"sta-bilizer"in the composite glass layer.However,increasing the CeO2 content accelerates the reaction between the SiO2 glass phase and SiC,leading to a higher SiO2 consumption and reduced self-healing ability of the glass layer.The 1%CeO2-60%HfB2-39%SiC coating showed improved glass layer viscosity and stability,moderate SiO2 consumption,and better self-healing ability,significantly boosting the oxidation protection of the coating.关键词
HfB2-SiC涂层/CeO2/抗氧化能力/自修复能力/机理Key words
HfB2-SiC coatings/CeO2/Oxidation resistance/Self-healing ability/Mechanism分类
通用工业技术引用本文复制引用
何昌林,任宣儒,Evgeny A Levashov,Ph V Kiryukhantsev-Korneev,冯培忠,商智超,王炜光,李向明,王坤,陈跃星,柏鑫坛,王佩佩,吉祥..CeO2掺杂对碳碳复合材料上HfB2-SiC涂层抗氧化性能的增强作用[J].新型炭材料（中英文）,2025,40(3):688-702,15.基金项目
This work has been supported by the National Natural Science Foundation of China(52261135546,52272055,52302047),the Key Research and Devel-opment Project of Henan Province(241111232600),the Joint Fund of Henan Province Science and Tech-nology R&D Program(225200810031,235200810095,225200810002).The Scientific and Technological Research Project of Henan Academy of Sciences(242221015).The International Science and Technology Cooperation Project of Henan Province(252102521081).The Natural Science Foundation of Shaanxi Province(2023-JC-QN-0563).E.A.Levashov and Ph.V.Kiryukhantsev-Korneev would like to acknowledge the financial support from the Russian Science Foundation(23-49-00141). 国家自然科学基金(52261135546,52272055,52302047) （52261135546,52272055,52302047）
河南省重点研发专项(241111232600) （241111232600）
河南省科技研发计划联合基金项目(225200810031,235200810095,225200810002) （225200810031,235200810095,225200810002）
河南省科学院科技攻关项目(242221015) （242221015）
河南省国际科技合作项目(252102521081) （252102521081）
陕西省自然科学基础研究计划(2023-JC-QN-0563) （2023-JC-QN-0563）
俄罗斯科学基金(23-49-00141). （23-49-00141）
