A novel finned micro-groove array structure and forming process

Tang, Yong; Chi, Yong; Wan, Zhenping; Liu, X.-K.; Chen, J.-Ch.; Deng, Xiangxing; Liu, L.

doi:10.1016/j.jmatprotec.2007.11.070

Cited by 16 publications

(5 citation statements)

References 11 publications

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“…Tool for micro-ploughing process Fig. 3 presents the formation of fins [15]. When the plough edge cut into the metal, the metal flowed to the two extrusion faces, respectively.…”

Section: Methodsmentioning

confidence: 99%

Micro-Ploughing Process of Copper Current Collector for Lithium-Ion Battery

Tang

et al. 2011

AMR

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A three-dimensional “fin-groove” composite structure copper current collector was fabricated by micro-ploughing process. 3D and common 2D carbon anodes for lithium- ion batteries were prepared. The electrochemical properties of these electrodes were studied by linear sweep cyclic voltammetry (CV) and charge-discharge (C-D) test. 2D anode showed high contact resistance, high coulombic efficiency but poor cycle performance. In contrast, 3D anode showed the structure superiority in reinforcing bonding force between active materials and copper substrate, improving the conductive environment and alleviating volume changes. It was believed that 3D anode can keep high coulombic efficiency and improve the cycle performance of lithium- ion batteries.

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“…Tool for micro-ploughing process Fig. 3 presents the formation of fins [15]. When the plough edge cut into the metal, the metal flowed to the two extrusion faces, respectively.…”

Section: Methodsmentioning

confidence: 99%

Micro-Ploughing Process of Copper Current Collector for Lithium-Ion Battery

Tang

et al. 2011

AMR

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“…The conventional methods commonly used include laser beam machining [9], grinding [10], wire electrochemical machining [11], ploughing extrusion [12], etc. However, conventional machining techniques cannot deal with more complex configurations, such as freeform geometries in the micron range.…”

Section: Introductionmentioning

confidence: 99%

A study of cutting factors affecting the generation of functional hierarchical rib array structure in ultra-precision raster milling

Wang

Lee

2015

Int J Adv Manuf Technol

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Hierarchical ribs can be used to keep balance between heat transfer enhancement and pressure drop reduction. The unique hierarchical structure which features a first-order asymmetric arc rib imposed by second-order microgrooves greatly reduces the pressure drop as well as enhances the heat transfer. However, it is hard for conventional machining techniques to generate such complicated configurations, especially freeform geometries in the micron range. Taking advantage of ultra-precision raster milling (UPRM), a novel one-step machining process, for advanced hierarchical ribs is proposed and demonstrated. In this paper, the principle of the cutting strategy for the second-order microstructures and cutting conditions that affect the basic features of the structures are discussed. In addition, three-level factorial design of cutting speeds, feed rates, and depth of cuts were set and used to machine hierarchical ribs on a copper workpiece. It was found that the cutting strategy was affecting the geometry of secondorder microstructures of hierarchical ribs in UPRM. Moreover, the result revealed that at low levels of feed rate and cutting depth, a middle level of cutting speed provides a better quality of second-order microstructures than a middle level of feed rate, high level of cutting depth, and low level and high level of cutting speed. Maintaining a balance between machining efficiency and hierarchical structure generation quality is thoroughly assessed by machining second-order microgrooves on asymmetric arc primary surfaces.

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“…Since invented by Tang et al (1997) and further studied by Tang et al (2003Tang et al ( , 2008, the plough method has been used to manufacture groove-shaped microchannels (shortened as grooves) on copper, including copper plate (Tang et al, 2010a), copper tube and copper bar (Xiang et al, 2009); and it has been widely applied in heat pipe production for electronic industry (Wang et al, 2009), circumferential outer finned tube and axial inner finned tube (Wan and Tang, 2010), etc. However, with the development of enhanced heat and mass transfer, Rojas and Andres (2006) found that the technology to manufacture circumferential V-shaped microchannels on the inner surface of tubes was also in need.…”

Section: Introductionmentioning

confidence: 99%