Influence of SiO_2 nano-particles on microstructures and properties of Ni-W-P/CeO_2-SiO_2 composites prepared by pulse electrodeposition  

作　　者：王军丽 徐瑞东 章俞之 

机构地区：[1]Research Center for Analysis and Measurement,Kunming University of Science and Technology [2]Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology [3]Key Laboratory of Inorganic Coating Materials,Chinese Academy of Sciences

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第5期839-843,共5页中国有色金属学报（英文版）

基　　金：Project(20806035) supported by the National Natural Science Foundation of China;Project(2009CI026) supported by Back-up Personnel Foundation of Academic and Technology Leaders of Yunnan Province,China;Project(KKZ6200927001) supported by Opening Fund of Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences; Project(2007E187M) supported by Applied Basic Research Plans of Yunnan Province,China;Project(08C0025) supported by Scientific Research Fund of Yunnan Provincial Education Department, China; Project(KKZ3200927029) supported by Training Foundation for Talents of Kunming University of Science and Technology,China;Project(2008-003) supported by Analysis and Measurement Research Fund of Kunming University of Science and Technology,China

摘　　要：Ni-W-P base composites containing CeO2 and SiO2 nano-particles were prepared on common carbon steel surface by pulse co-deposition of Ni,W,P,CeO2 and SiO2 nano-particles.The influence of SiO2 concentrations in bath on microstructures and properties of Ni-W-P/CeO2-SiO2 composites was studied,and the characteristics were assessed by chemical compositions,element distribution,surface morphologies,deposition rate and microhardness.The results indicate that when SiO2 concentration in bath is controlled at 20 g/L,the composites possess the fastest deposition rate,the highest microhardness,compact microstructures,smaller crystallite sizes and uniform distribution of W,P,Ce and Si within Ni-W-P matrix metal.Increasing SiO2 concentration in bath from 10 to 20 g/L leads to the refinement in grain size and the inhomogeneity of microstructures.While when SiO2 concentration is increased to 30 g/L,the crystallite sizes increase again and some bosses with nodulation shape appear on the surface of composites.Ni-W-P base composites containing CeO2 and SiO2 nano-particles were prepared on common carbon steel surface by pulse co-deposition of Ni,W,P,CeO2 and SiO2 nano-particles.The influence of SiO2 concentrations in bath on microstructures and properties of Ni-W-P/CeO2-SiO2 composites was studied,and the characteristics were assessed by chemical compositions,element distribution,surface morphologies,deposition rate and microhardness.The results indicate that when SiO2 concentration in bath is controlled at 20 g/L,the composites possess the fastest deposition rate,the highest microhardness,compact microstructures,smaller crystallite sizes and uniform distribution of W,P,Ce and Si within Ni-W-P matrix metal.Increasing SiO2 concentration in bath from 10 to 20 g/L leads to the refinement in grain size and the inhomogeneity of microstructures.While when SiO2 concentration is increased to 30 g/L,the crystallite sizes increase again and some bosses with nodulation shape appear on the surface of composites.

关 键 词：pulse electrodeposition NANO-PARTICLE composite microstructure and property 

分 类 号：TG174.4[金属学及工艺—金属表面处理]