CAJ | 학술논문

在垂直稳恒磁场中采用纳米复合电沉积法制备 Fe- Si 复合镀层.研究了磁场强度和电流密度对阴极电流效率和镀层 Si 颗粒含量的影响规律，并采用扫描电子显微镜和能谱对所得镀层进行分析.施加垂直磁场后，随着磁场强度增大，阴极电流效率呈现先上升后下降的趋势；镀层 Si 颗粒质量分数在0.2 T 达到最大值20.17%，比无磁场下提高了10.4%；镀层表面形貌也发生显著变化，多处形成“山脊”，“山脊”延伸方向与磁流体力学效应方向一致，分布数量和延伸长度与磁场强度成正比.由于磁流体力学效应，施加磁场还改变了镀层表面气孔形貌，促进氢气的析出.
재수직은항자장중채용납미복합전침적법제비 Fe- Si 복합도층.연구료자장강도화전류밀도대음겁전류효솔화도층 Si 과립함량적영향규률，병채용소묘전자현미경화능보대소득도층진행분석.시가수직자장후，수착자장강도증대，음겁전류효솔정현선상승후하강적추세；도층 Si 과립질량분수재0.2 T 체도최대치20.17%，비무자장하제고료10.4%；도층표면형모야발생현저변화，다처형성“산척”，“산척”연신방향여자류체역학효응방향일치，분포수량화연신장도여자장강도성정비.유우자류체역학효응，시가자장환개변료도층표면기공형모，촉진경기적석출.
Fe-Si composite coatings were prepared by nano-composite electroplating in a static magnetic field parallel to the electrode surface. The effects of magnetic flux density and current density on the cathode current efficiency and silicon content in the coatings were studied. The coatings were characterized by scanning electron microscopy and energy dispersive spectrometry. It is found that the cathode current efficiency first increases and then decreases with increasing magnetic flux density. The mass fraction of silicon in the coatings reaches its maximum value of 20. 17% at 0. 2 T, which increases by 10. 4% compared with that without any magnetic field. In addition, the smooth surface morphology of the coatings turns into “mountain ranges”, whose directions are the same to the direction of magnetohydrodynamic convection (MHD). More and longer “mountain ranges” appear with increasing magnetic flux densi-ty. Owing to MHD effect, the magnetic field also influences the surface morphology of hydrogen pores and promotes the evolution of hydrogen.