CAJ | 학술논문

采用磁场增强电弧离子镀技术,通过改变位于靶材后方的轴向磁场强度,在2024Al合金表面沉积CrN薄膜,研究磁场强度对薄膜显微组织、显微硬度及耐腐蚀性能的影响.结果表明:随着磁场强度的增加,CrN薄膜结构由Cr 2 N与CrN的混合相逐渐转变为CrN的单一相结构;磁场强度对薄膜表面形貌有明显影响,随着磁场强度的增加,薄膜表面小颗粒的数量逐渐减少,较大尺寸颗粒的数量有所增加;CrN薄膜的显微硬度和弹性模量在磁场强度为7960 A/m时达到最大值,分别为23.9 GPa与392.6 GPa;CrN薄膜的阳极极化曲线的腐蚀电位随着磁场强度的增加先增加而后降低,在磁场强度为3184 A/m时,具有最大值,即具有较好的抗腐蚀性.
채용자장증강전호리자도기술,통과개변위우파재후방적축향자장강도,재2024Al합금표면침적CrN박막,연구자장강도대박막현미조직、현미경도급내부식성능적영향.결과표명:수착자장강도적증가,CrN박막결구유Cr 2 N여CrN적혼합상축점전변위CrN적단일상결구;자장강도대박막표면형모유명현영향,수착자장강도적증가,박막표면소과립적수량축점감소,교대척촌과립적수량유소증가;CrN박막적현미경도화탄성모량재자장강도위7960 A/m시체도최대치,분별위23.9 GPa여392.6 GPa;CrN박막적양겁겁화곡선적부식전위수착자장강도적증가선증가이후강저,재자장강도위3184 A/m시,구유최대치,즉구유교호적항부식성.
The CrN films were prepared using magnetic field-enhanced arc ion plating on 2024 Al alloy substrates, and the effect of axial magnetic field intensity behind the cathodic target on microstructure, microhardness and corrosion properties of film was investigated. The results show that, with the increase of the magnetic field intensity, the complex structures of Cr2N and CrN phase in the CrN films change to single phase of CrN, magnetic field has obvious effect on surface morphologies of film, the number of smaller particles reduces and the number of larger particles increases. When the magnetic field intensity is 7960 A/m, the microhardness and elastic modulus of the films reach the maximum values, which are 23.9 GPa and 392.6 GPa, respectively. The corrosion potentials of polarization curves firstly increase, and then decrease with the increase of the magnetic field intensity. The maximum value of the corrosion potential is obtained at the magnetic field intensity of 3184 A/m, namely, corresponding to the best corrosive resistance.