Microstructure and Morphology of Electrodeposited Nanocrystalline Ni-W Alloy
Electrodeposited nanocrystalline nickel-tungsten alloys have received attention due to its high tensile strength, premium hardness, thermal stability as well as excellent corrosion and wear resistance. Current and possible future applications of Ni-W alloys include magnetic heads and relays, mold inserts, bearings, and resistors, etc. In the present work, the microstructure and morphology with different tungsten content of Ni-W alloys deposited from electrolytes based on Ni(NH2SO3)2-4H2O and Na2WO4-2H2O were investigated. The microstructure, morphology and composition were examined by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and X-ray Fluorescence Spectrometer (XRF). The results show that the thickness of Ni-W alloy is about 1.7-2.0 mm, the alloy deposits possessed W contents in the range of 10％~27％. With the tungsten content increasing, the average grain size reduced from 10.7 nm to 5 nm and the lattice strain increased. The deposits display layer structure.
electrodeposited nickel-tungsten alloy nanocrystalline microstructure morphology
WANG Wei FAN Ai-ling WANG Yang MA Jie WANG Cong-zeng
Department of Materials, Beijing University of Technology,Beijing,China Guodian Luanhe Power Plant,CHINA GUODIAN CORPORATION,Chengde,China
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
612-614
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）