钛合金表面电弧离子镀CrN/Cr涂层抗氧化性能研究  

Research on Oxidation Resistance of CrN/Cr Coating on Titanium Alloy Surface by Arc Ion Plating

作　　者：迟百成 卢旭东[1] 郭策安[1] 车龙[1] 孙慧贤 CHI Baicheng;LU Xudong;GUO Cean;CHE Long;SUN Huixian(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学装备工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2025年第2期55-60,共6页Journal of Shenyang Ligong University

基　　金：辽宁省应用基础研究计划项目(2022JH2/101300006)。

摘　　要：为提升钛合金的抗氧化性能,延长其在高温环境下的服役寿命,采用电弧离子镀技术在钛合金表面制备CrN/Cr涂层,研究钛合金及CrN/Cr涂层在600、800、900℃下的高温氧化行为。实验结果表明:钛合金经高温氧化后在其表面生成了TiO_(2)和Al_(2)O_(3)混合氧化物膜,随温度升高,Al元素沿合金晶界和氧化物颗粒间隙向外扩散能力增强,钛合金表面氧化物含量增多,混合氧化物膜厚度增大;CrN/Cr涂层经高温氧化后,其中的CrN与O_(2)反应生成了Cr_(2)O_(3)氧化膜,对钛合金基体起到保护作用,反应温度越高,氧化越充分,形成的氧化物颗粒更均匀,氧化膜更致密,涂层的抗氧化性能更好。To enhance the oxidation resistance of titanium alloys and prolong their service life in high-temperature environments,CrN/Cr coatings were deposited on the surface of titanium alloys using arc ion plating(AIP)technology.The high-temperature oxidation behavior of titanium alloys and CrN/Cr coatings at 600,800 and 900℃was investigated.The experimental results indicate that during the high-temperature oxidation process of titanium alloys,the primary elements Ti and Al reacted with O_(2) to produce TiO_(2) and Al_(2)O_(3) mixed oxide films,which coat the surface of the alloy.As the temperature rises,the ability of Al element to diffuse outward along the alloy’s grain boundaries and oxide particle gaps is enhanced.Consequently,the surface oxide content of the titanium alloy has increased,and the thickness of the mixed oxide films also have escalated.After high-temperature oxidation,the CrN/Cr coating reacts with O_(2) to form a Cr_(2)O_(3) oxide film,which protects the titanium alloy substrate.The higher the reaction temperature,the more complete the oxidation,resulting in more uniform oxide particles,denser oxide film,and better oxidation resistance of the coating.

关 键 词：钛合金 电弧离子镀 CrN/Cr涂层 高温氧化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]