于志琦,赵燕春,苏玉,冯远飞,马虎文,汪磊,冯力

• 1:兰州理工大学材料科学与工程学院
• 2:省部共建有色金属先进加工与再利用国家重点实验室
• 3:兰州理工大学温州泵阀工程研究院

摘要(Abstract)：

通过水冷铜坩埚磁悬浮熔炼炉和负压铜模吸铸法制备了(TiZrHf)_(50)Ni_(30)Cu_(20-x)Co_x(x=2、4和6 at%)高熵形状记忆合金，采用电化学工作站测试其在3.5 mass%NaCl溶液中的腐蚀性能。结果表明：(TiZrHf)_(50)Ni_(30)Cu_(20-x)Co_x合金由B2相和B19′相构成，随着Co含量的增加，B2相的衍射峰强度逐渐增加，同时合金的混合熵也增大；合金在3.5 mass%NaCl溶液中表现出钝化行为，随着Co含量的增加，合金的腐蚀电流密度减小，点蚀电位、容抗弧半径和极化电阻增大，同时点蚀坑数量逐渐减少，表明合金的耐腐蚀性能提高；X射线光电能谱分析表明(TiZrHf)_(50)Ni_(30)Cu_(14)Co_6合金的钝化膜主要由NiO和Cu_2O等组成，能有效阻止Cl~-对基体的进一步侵蚀，而Co(OH)_2有助于提升膜层的致密性和吸附能力。

关键词(KeyWords)： 高熵形状记忆合金;NaCl溶液;电化学腐蚀;XPS分析

Abstract:

Keywords:

基金项目(Foundation): 兰州市青年人才创新项目(2023-QN-91);; 甘肃省科技计划(25CXGA077);; 国家自然科学基金(12404230,52061027);; 浙江省自然科学基金项目(LY23E010002)

作者(Author): 于志琦,赵燕春,苏玉,冯远飞,马虎文,汪磊,冯力

DOI: 10.13289/j.issn.1009-6264.2025-zt02

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