徐琴,王琪,赵甲丁,殷亚军,陈瑞润

• 1:河南工业大学机电工程学院
• 2:哈尔滨工业大学金属精密热加工国家级重点实验室
• 3:华中科技大学材料成形与模具技术全国重点实验室

摘要(Abstract)：

制备了不同V元素含量的CrMoNbTiV_x(x=0、0.2、0.4、0.6和0.8)难熔高熵合金，并在800℃下对其进行高温抗氧化性能实验，研究了合金表面形成的氧化膜的微观组织特征及演化规律。结果表明：在800℃氧化不同时间后，不同V元素含量的CrMoNbTiV_x合金形成了不同的氧化产物，形成的针状V_2Nb_6O_(19)氧化物显著降低了合金的抗氧化性能；随着V元素含量的降低，合金表面氧化膜的厚度变薄，CrMoNbTiV_(0.8)和CrMoNbTi合金氧化100 h后的表面氧化膜的厚度分别为40和16μm,合金氧化膜中针状V_2Nb_6O_(19)氧化物减少，致密的Ti_4Cr_3Nb_3O_2氧化物和CrVNbO_6氧化物增加，降低合金的内氧化，进而提高合金的抗氧化性能；当V含量为0时，CrMoNbTi合金中疏松氧化物消失，氧化膜由致密的TiO_2、Ti_4Cr_3Nb_3O_2和少量MoO_3氧化物组成，合金的抗氧化性能大幅度提高。

关键词(KeyWords)： 难熔高熵合金;氧化膜;组织特征;抗氧化性能;高温

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52001114,52425401);; 河南省高校科技创新人才支持计划(23HASTIT022);; 华中科技大学材料成形与模具技术国家重点实验室开放基金(P2023-005);; 河南省超硬磨料磨削装备重点实验室开放课题重点项目(JDKFJJ2024003)

作者(Author): 徐琴,王琪,赵甲丁,殷亚军,陈瑞润

DOI: 10.13289/j.issn.1009-6264.2025-zt04

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