Study on characteristics of Ni-W-B composites containing CeO_2 nano-particles prepared by pulse electrodeposition  

作　　者：WANG Junli XU Ruidong ZHANG Yuzhi 王军丽;徐瑞东;章俞之(Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgical and Energy En-gineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Inorganic Coating Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China [2]Faculty of Metallurgical and Energy En-gineering,Kunming University of Science and Technology,Kunming 650093,China [3]Key Laboratory of Inorganic Coating Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China

出　　处：《Journal of Rare Earths》2012年第1期43-47,共5页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China (20806035);Back-up Personnel Foundation of Academic and Technology Leaders of Yunnan Province(2009CI026);Key Lab of Advanced Materials in Rare & Precious and Non-ferrous Metals,Ministry of Education(ZDS2010015C);Yunnan Province Construction Plans of Scientific and Technological Conditions (2010DH025);Opening Project of Key Laboratory of Inorganic Coating Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences (KKZ6200927001);Training Foundation for Talents of Kunming University of Science and Technology (KKZ3200927029)

摘　　要：Ni-W-B composites containing CeO2 nano-particles on the surface of 45 steel were prepared by pulse electrodeposition,and the in-fluence of pulse frequency,pulse duty circle and heat treatment temperature on the structures and properties were investigated.The results in-dicated that the pulse co-deposition of Ni,W,B and CeO2 nano-particles led to Ni-W-B/CeO2 composites possessing higher microhardness and better wear resistance when heat-treated at 400 oC for 1 h.The microhardness of 636 HV and the deposition rate of 0.0281 mm/h of the as-deposited alloy were the highest at pulse frequency of 1000 Hz,pulse duty circle of 10% and pulse average current density of 10 A/dm2.The composites were mainly in the amorphous state and were partially crystallized as-deposited,and the crystallization trend was strength-ened when heat-treated at 400 oC.Decreasing pulse duty cycle from 75% to 10% was favorable to the refinement in grain structures and im-provement of microstructures.The crystal sizes of the composites were smaller by means of pulse electrodeposition.Ni-W-B composites containing CeO2 nano-particles on the surface of 45 steel were prepared by pulse electrodeposition,and the in-fluence of pulse frequency,pulse duty circle and heat treatment temperature on the structures and properties were investigated.The results in-dicated that the pulse co-deposition of Ni,W,B and CeO2 nano-particles led to Ni-W-B/CeO2 composites possessing higher microhardness and better wear resistance when heat-treated at 400 oC for 1 h.The microhardness of 636 HV and the deposition rate of 0.0281 mm/h of the as-deposited alloy were the highest at pulse frequency of 1000 Hz,pulse duty circle of 10% and pulse average current density of 10 A/dm2.The composites were mainly in the amorphous state and were partially crystallized as-deposited,and the crystallization trend was strength-ened when heat-treated at 400 oC.Decreasing pulse duty cycle from 75% to 10% was favorable to the refinement in grain structures and im-provement of microstructures.The crystal sizes of the composites were smaller by means of pulse electrodeposition.

关 键 词：pulse electrodeposition COMPOSITES CHARACTERISTICS rare earths 

分 类 号：TB33[一般工业技术—材料科学与工程]