Electrodeposition of Ni-Co-Fe_2O_3 composite coatings  

作　　者：马莉 周科朝 李志友 魏秋平 

机构地区：[1]Key State Laboratory of Powder Metallurgy,Central South University [2]School of Materials Science and Engineering,Central South University

出　　处：《Journal of Central South University》2010年第4期708-714,共7页中南大学学报（英文版）

基　　金：Project(2005CB623703) supported by the National Key Basic Research Program of China;Project(50474051) supported by the National Natural Science Foundation of China;Project(CX2009B032) supported by Innovation Foundation for Postgraduate of Hunan Province of China; Project(ZKJ2009024) supported by the Precious Apparatus Open Share Foundation of Central South University, China;Project(2009ybfz02) supported by Excellent Doctor Support Fund of Central South University,China

摘　　要：Ni-Co-Fe2O3 composite coatings were electrodeposited using cetyltrimethylammonium bromide(CTAB)-modified Watt's nickel bath with Fe2O3 particles dispersed in it.The effects of the plating parameters on the chemical composition,structural and morphological characteristics of the electrodeposited Ni-Co-Fe2O3 composite coatings were investigated by energy dispersive X-ray(EDS) spectroscopy,X-ray diffractometry(XRD) and scanning electron microscopy(SEM).The results reveal that Fe2O3 particles can be codeposited in the Ni-Co matrix.The codeposition of Fe2O3 particles with Ni-Co is favoured at high Fe2O3 particle concentration and medium stirring,and the deposition of Co is favoured at high concentration of CTAB.Moreover,the study of the textural perfection of the deposits reveals that the presence of particles leads to the worsening of the quality of the observed <220> preferred orientation.Composites with high concentration of embedded particles exhibit a preferred crystal orientation of <111>.The more the embedded Fe2O3 particles in the metallic matrix,the smaller the sizes of the crystallite for the composite deposits.Ni-Co-Fe2O3 composite coatings were electrodeposited using cetyltrimethylammonium bromide （CTAB）-modified Watt＇s nickel bath with Fe2O3 particles dispersed in it. The effects of the plating parameters on the chemical composition, structural and morphological characteristics of the electrodeposited Ni-Co-Fe2O3 composite coatings were investigated by energy dispersive X-ray （EDS） spectroscopy, X-ray diffractometry （XRD） and scanning electron microscopy （SEM）. The results reveal that Fe2O3 particles can be codeposited in the Ni-Co matrix. The codeposition of Fe2O3 particles with Ni-Co is favoured at high Fe2O3 particle concentration and medium stirring, and the deposition of Co is favoured at high concentration of CTAB. Moreover, the study of the textural perfection of the deposits reveals that the presence of particles leads to the worsening of the quality of the observed 〈220〉 preferred orientation. Composites with high concentration of embedded particles exhibit a preferred crystal orientation of 〈 111 〉. The more the embedded Fe2O3 particles in the metallic matrix, the smaller the sizes of the crystallite for the composite deposits.

关 键 词：ELECTRODEPOSITION Co-Ni alloy Fe2O3 particles composite coatings cetyltrimethylammonium bromide 

分 类 号：TB383.2[一般工业技术—材料科学与工程]