Research on Porous Metal Nickel in Jet Electrodeposits
The theory and related technology of porous metal nickel by using jet electro deposition (JED) are reviewed, and preparation of different porosity of the porous metal nickel samples was made by the developed plant. The surface morphology, microstructure, and grain size of the micro-cell structure of deposition were studied and analyzed by means of SEM, and the mechanical properties of the sample were also studied, such as surface micro hardness and compressive property. The results are as follows: The process of porous nickel preparation with jet electrodeposition which mentioned in paper is capable of prepare porous metal with dendritic crystal structure as the subject porous structure. Ejection electrodeposition has great advantages in machining efficiency and cost compared with porous metal preparation process of traditional electrodeposition. The porous nickel metal sample prepared in respects of pore distribution and porosity is affected by electrodeposited porous dendritic crystal layers. The formula Bath A which has a relatively low concentration of nickel ions can make the preparation of uniform density porous structure of the dendrite more favorable. Current density is the key indicators of forming ideal branched crystal, and which more than 60 A/dm2 can make processing state access to good working state. With the increase in current density, the dendrite formation of porous structure becomes more dense. Using jet scanning electrodeposition at current density of 80 A/dm2, the prepared samples porosity is 48. 7%. The surface micro hardness of the sample reaches HV 315. The compressive yield stress of porous nickel is 11.35 MPa, which has a large number of plastic deformations of the absorption capacity. From original data of sample energy absorption rate and fitting curve, it is known that at a relatively low flow stress, there comes great plastic deformation, which gives the sample better fine absorption ability and relatively greater energy absorption rate.
Porous metal Dendritic Crystal Micro Hardness Compressive Property Jet Electro-deposition Ni
Kai Gong Yinhui Huang Zongjun Tian Zhidong Liu Guifeng Wang
Jiangsu Key Laboratory of Precision and Micro-Manufacturing technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
国际会议
The 16th International Symposium on Electromachining(第16届国际电加工会议)
上海
英文
327-330
2010-04-19（万方平台首次上网日期，不代表论文的发表时间）