化学镀制备Co基合金薄膜及性能研究

Investigation on Properties of Co-Based Alloy Films Prepared by Electroless Plating

为了探讨 Mo或 W元素掺杂对 Co-P合金薄膜结构和性能的影响机理,采用化学镀法分别制备 Co-Mo-P和 CoW-P 合金薄膜,研究其结构、物相组成、微观形貌、磁性能和耐腐蚀性能,并与 Co-P 合金薄膜进行比较。结果表明:Co-Mo-P 合金薄膜和 Co-W-P 合金薄膜都呈晶态结构,除单质 Co 相以外,还形成置换固溶体 CoMo 相、CoW 相。与Co-P 合金薄膜相比,Co-Mo-P 合金薄膜和 Co-W-P 合金薄膜的磁性能较好,耐腐蚀性能提高。W 原子进入 Co 晶格中形成置换固溶体 CoW,起到较好地促进结晶细化效果,使 Co-W-P 合金薄膜表面结构更紧凑致密,具有更强地阻碍畴壁移动和阻挡腐蚀介质侵蚀的能力,因此其磁性能和耐腐蚀性能更好。

Co-Mo-P alloy films and Co-W-P alloy films were prepared by electroless plating in order to investigate the effect mechanism of Mo or W elements doping on the structure and properties of CoP alloy films. The structure ,phase composition ,microstructure ,magnetic property and corrosion resistance of Co-Mo-P and Co-W-P alloy films were investigated and compared with those of Co-P alloy films. The results showed that both Co-Mo-P alloy films and Co-W-P alloy films had crystalline structure,and the phase composition included not only Co phase,but also substitution solid solution CoMo phase or CoW phase. Compared with Co-P alloy films,Co-Mo-P alloy films and Co-W-P alloy films had better magnetic property and corrosion resistance. The substitution solid solution CoW was formed because W atoms entered into the Co lattice,which can better promote the crystallization refin‐ing,make the surface structure of Co-W-P alloy film more compact and compact ,and improve the ability of block the movement of domain walls and resist the erosion of corrosive media. Therefore ,Co-W-P alloy films showed excellent magnetic properties and corrosion resistance.