Coining process as a means of controlling surface microgeometry

Ike, Hiroshi; Plančak, Miroslav

doi:10.1016/s0924-0136(98)00101-0

Cited by 58 publications

(23 citation statements)

References 10 publications

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“…[12,13] Considering lubricated conditions, the improvements can be attributed to the storage of produced wear particles, [14] a reservoir effect for lubricants, [15] and an additional hydrodynamic pressure build-up. [16] There are various methods to manufacture artificial topographies with variable pattern parameters such as structural depth, pitch, diameter, or area density including lithographic methods, [17] embossing/coining, [18] and laser surface texturing. [19] Laser surface texturing and in particular direct laser interference patterning (DLIP) is a suitable technique to structure various materials with patterns having mm and even sub-mm features.…”

Section: Introductionmentioning

confidence: 99%

Effects of Multi‐Scale Patterning on the Run‐In Behavior of Steel–Alumina Pairings under Lubricated Conditions

et al. 2017

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In nature, many examples of multi-scale surfaces with outstanding tribological properties such as reduced friction and wear under dry friction and lubricated conditions can be found. To determine whether multi-scale surfaces positively affect the frictional and wear performance, tests are performed on a ball-on-disk tribometer under lubricated conditions using an additive-free poly-alpha-olefine oil under a contact pressure of around 1.29 GPa. For this purpose, stainless steel specimens (AISI 304) are modified by micro-coining (hemispherical structures with a structural depth of either 50 or 95 mm) and subsequently by direct laser interference patterning (cross-like pattern with 9 mm periodicity) to create a multi-scale pattern. The comparison of different sample states (polished reference, laser-patterned, micro-coined, and multi-scale) shows a clear influence of the fabrication technique. In terms of the multi-scale structures, the structural depth of the coarser micro-coining plays an important role. In case of lower coining depths (50 mm), the multi-scale specimens show an increased coefficient of friction compared to the purely micro-coined surfaces, whereas larger coining depths (95 mm) result in stable and lower friction values for the multi-scale patterns.

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Section: Introductionmentioning

confidence: 99%

Effects of Multi‐Scale Patterning on the Run‐In Behavior of Steel–Alumina Pairings under Lubricated Conditions

et al. 2017

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“…The microindentation with 6.2 mm depth was prepared by Vickers indentation. The surface image and roughness were obtained using a confocal scanning microscope 17,18) (CSM; Lasertec HD-100D). Figure 4 shows the cross-sectional illustration of the indented die and imprinted specimen.…”

Section: Methodsmentioning

confidence: 99%

Fillability and Imprintability of High-strength Ni-based Bulk Metallic Glass Prepared by the Precision Die-casting Technique

et al. 2004

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The fillability and imprintability of a Ni-based bulk metallic glass (BMG) prepared by the precision die-casting was investigated. A threedimensional microgear made of Ni-based BMG is successfully prepared by the precision die-casting technique. The cast Ni-based BMG has excellent fillability against a microindentation formed by Vickers indentation, and the filling area obtained using a confocal scanning microscope reaches 99%. In addition, the cast Ni-based BMG exhibits excellent imprintability of the die surface even on a nanometer scale. It is therefore concluded that the Ni-based BMG is suitable as a material for micromachines due to its superior fillability and imprintability.

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“…마이크로 엠보싱 [5,6], 마이 크로 펀칭 [7] 등의 공정에 대한 연구가 진행되었다. 금속성형 공정 중에서 마이크로 롤-롤 성형 공정은 높은 생산성으로 인해 PDP 격벽구조, 솔라셀 집전 판, 기판회로 설계 등의 넓은 범위에서 활용이 검토 되고 있다.…”

Section: 서 론unclassified

Design of Roll-to-Roll Forming Process for Micro Pattern on the Thin Sheet Metal by Finite Element Analysis

Cha¹,

Shin²,

Lee³

et al. 2010

Transactions of Materials Processing

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Roll-to-roll forming process is one of important metal processing technology because the process is simple and economical. These days, with these merits, roll-to-roll forming process is tried to be employed in manufacturing the circuit board, barrier ribs and solar cell plate. However, it is difficult to apply to the forming of micro scale or sub-micro scale pattern. In this study, the roll forming processing for the micro scale is designed and analyzed. The forming of micro pattern for small electric device such as LCD panel by incremental roll forming process is analyzed. Firstly, the optimum analysis conditions are found by several analyses. And then, formability is analyzed for various protrusion shapes at various forming temperatures. The formability is evaluated in terms of filling ratio and damage value. The filling ratio is defined from the tool geometry and critical damage is determined from the analysis of uniaxial tensile test. Finally, optimum forming conditions that guarantee the successful forming are found.

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Coining process as a means of controlling surface microgeometry

Cited by 58 publications

References 10 publications

Effects of Multi‐Scale Patterning on the Run‐In Behavior of Steel–Alumina Pairings under Lubricated Conditions

Effects of Multi‐Scale Patterning on the Run‐In Behavior of Steel–Alumina Pairings under Lubricated Conditions

Fillability and Imprintability of High-strength Ni-based Bulk Metallic Glass Prepared by the Precision Die-casting Technique

Design of Roll-to-Roll Forming Process for Micro Pattern on the Thin Sheet Metal by Finite Element Analysis

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