电沉积条件和热处理对Fe-Co-P合金结构和磁性能的影响  

Influence of the Electro-Deposition Conditions and Heat Treatment on the Structure and Magnetic Performances of the Fe-Co-P Alloy

作　　者：王森林[1] 陈志明[1] 

机构地区：[1]华侨大学材料科学与工程学院应用化学系,福建泉州362021

出　　处：《稀有金属材料与工程》2007年第A03期5-8,共4页Rare Metal Materials and Engineering

基　　金：福建省自然科学基金资助(E0640004)

摘　　要：以硼酸为缓冲剂、柠檬酸钠为络合剂,在弱酸性体系电沉积Fe-Co-P合金。采用EDS,XRD和振动样品磁强计(VSM)研究沉积条件。结果表明:当镀液pH值从3.0增加到4.5时,镀层中铁含量从5.54 at%增加到73.75 at%,而钴含量从63.41 at%下降到16.89 at%,磷含量从31.04 at%下降到9.36 at%;Fe-Co-P合金的磁性能与沉积条件密切相关,随着镀层中铁含量的增加和磷含量的降低,镀层的饱和磁化强度增加;镀态时镀层呈非晶态,在360℃会发生晶化出现体心立方Fe-Co合金和少量六方Co-Fe合金相,而600℃时存在立方Fe-Co和Co_2P合金相:在500℃对Fe_(63.4)Co_(5.6)P_(31.0)合金进行退火处理,能显著提高该合金的饱和磁化强度和矫顽力。The Fe-Co-P alloys were deposited from a soft acidic bath, containing boric acid as a buffer agent and sodium citrate as a complexing agent. The structure and the magnetic properties of the deposit were studied by energy dispersive X-ray spectral （EDS）, X-ray diffraction （XRD） and vibrating sample magnetometer （VSM）. With the increase of pH of the plating solution from 3.0 to 4.5, the content of Fe of the deposit increased from 5.54 at% to 73.75 at%. On the other hand, the content of Co decreased from 63.41 at% to 16.89 at%, and the content of P decreased from 31.04 at% to 9.36 at%. The magnetic properties of the alloy were relative to the deposition conditions. The saturation magnetization of the coating increased with the increase of the content of Fe of the coating and the decrease of the content of P. The structure of the as-plated deposit was amorphous. The deposit was crystallized into cubic Fe-Co and some hexagonal Co-Fe phases, and then, transformed into Co2P phase at 600 ℃. The deposit after heat treatment at 500 ℃ could evidentily promoted its saturation magnetization and coercivity.

关 键 词：Fe—Co—P合金 电沉积 非晶态 磁性能 

分 类 号：TM27[一般工业技术—材料科学与工程]