电沉积制备铁-镍-铬纳米晶合金箔工艺的正交设计

运用正交设计研究影响电沉积铁-镍-铬合金箔质量的主要工艺因素, 分析电流密度、溶液温度和溶液的pH值等各因素对合金成分和电流效率的影响, 通过综合评分的方法确定最佳工艺条件, 并对最佳工艺条件下获得的合金箔材的微观形貌、结构、物理和化学性能进行研究.研究结果表明: 制备的合金箔材成分为60%～65?, 34%～36%Ni, 1%～2%Cr, 厚度均匀, 表面光滑, 结晶细致. 扫描电镜观察和X衍射结果表明: 其晶粒尺寸在纳米范围内, 合金箔的抗拉强度和延展率分别为658 MPa和6%以上, 电阻率超过90 μΩ·cm, 磁感应强度为1.25 T, 最大导磁率为1.096×10-2 H·m-1, 矫顽力为357.53 A·m-1;箔材具有优异的耐腐蚀性能.

Orthogonal design of technology for electrodeposition nanocrystalline Fe-Ni-Cr alloy foil

The technology of the electrodeposition nanocrystalline Fe-Ni-Cr alloy foil from sulfate-chrolide solution was studied by orthogonal design. The effects of operating parameters such as current density, temperature and pH of solution, on Fe-Ni-Cr alloy foil were discussed by synthetical graded approach. The best process for Fe-Ni-Cr alloy foil was obtained through synthetic analysis. The results from scanning electron micrograph (SEM) and X-ray diffraction(XRD)show that Fe-Ni-Cr alloy foil possesses a smooth and clean appearance, uniform thickness and stable composition of 60%65%Fe, 34%36%Ni and 11%2%Cr, and the grain size of alloy is less than 100 nm, which indicates it is nanocrystalline. The nanocrystalline alloy foil also exhibits better mechanical, electromagnetic performance and better corrosion resistance.