以硫脲为硫源,硼酸为缓冲剂、柠檬酸三钠为络合剂及糖精和1,4-丁炔二醇为添加剂的酸性镀液中电沉积了Fe-Ni-S非晶合金薄膜.采用差示扫描量热(DSC),X射线衍射(XRD)和扫描电镜(SEM)研究了该合金的晶化行为和表面微观形貌.结果表明,镀态Fe-Ni-S合金呈非晶态结构,250℃热处理出现了Fe7Ni3(Im3m)微晶,320.4℃开始晶化出现NiS(R3m)相和FeNis(Pm3m)相,417.9℃下大量晶化生成NiS(Ram)相和FeNia(Pm3m)相,500℃时合金完全晶化生成许多粒径约为100-200 nm均匀颗粒.研究了热处理对合金薄膜的磁性能、显微硬度和耐腐蚀性能的影响.250℃以下,随着退火温度升高,薄膜的磁性能、显微硬度和耐腐蚀性能不断提高,然后下降.250℃热处理时,合金薄膜饱和磁化强度,硬度和电化学阻抗达到最大(Ms≈1201.1 kA/m,Hv≈425.4 kg/mm2,Z′≈400 Ω),而矫顽力最小(Hc≈2.1 kA/m).因此250℃热处理的合金镀层软磁性能最佳,耐腐蚀最好.
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