Advances in engineered surfaces for functional performance

Bruzzone, Agostino; Costa, H.L.; Lonardo, P.M.; Lucca, D.A.

doi:10.1016/j.cirp.2008.09.003

Cited by 613 publications

(285 citation statements)

References 207 publications

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“…There are several other ways to produce textured surfaces, encompassing adding, removing and moving material techniques [3]. In order to assess the efficiency of textured surfaces, experimental tests simulating real working conditions have to be performed.…”

Section: Fig1mentioning

confidence: 99%

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A New Rig for Testing Textured Surfaces in Pure Sliding Conditions

Godi

Grønbæk²,

Mohaghegh

et al. 2013

Tribol Lett

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Throughout the years, it has become more and more important to find new methods for reducing friction and wear occurrence in machine elements. A possible solution is found in texturing the surfaces under tribological contact, as demonstrated by the development and spread of plateau-honed surface for cylinder liners. To prove the efficacy of a particular textured surface, it is paramount to perform experimental tests under controlled laboratory conditions. In this paper a new test rig simulating pure sliding conditions is presented, dubbed Axial Sliding Test. It presents four major components: a rod, a sleeve, a housing and a stripwound container. The rod and the sleeve are the two surfaces in relative sliding motion; the stripwound container maintains a constant, but adjustable normal pressure and the housing serves as interface between the sleeve and the container. For carrying out the test, two machineries are necessary: a press to provide the normal pressure and a tensile machine to perform the axial movements. The test is calibrated so that the correspondence between the normal pressure and the container advancement is found. Preliminary tests are carried out involving a multifunctional and a fine turned rod against a mirror-polished sleeve. Qualitatively the multifunctional surfaces improve the friction conditions, but a more structured test campaign is required. It is furthermore assessed the repeatability of the test device, in order to rely on the results obtained. Ten repetitions made at the same pressure using the fine turned rod displayed good repeatability of the force results both in terms of average values and trends.

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Section: Fig1mentioning

confidence: 99%

“…The world energy consumed to overcome friction lies around 30%, while the economic costs associated with wear is higher than the 5% of the GDP of developed countries [3][4][5][6]. A possible solution has been deemed being surface texturing.…”

Section: Introductionmentioning

confidence: 99%

A New Rig for Testing Textured Surfaces in Pure Sliding Conditions

Godi

Grønbæk²,

Mohaghegh

et al. 2013

Tribol Lett

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“…Wear of the polyethylene sphere is higher with the TiN coated disk at 50 Hz and adhesions on the disk surface occurred (see Table 1). Nanoindentation has established itself in the last decade as the fundamental quasi-non-destructive method for the evaluation of the mechanical response of small material volumes and thin films to applied loading [13,14]. As such, nanoindentation tests were performed on both uncoated Ni and TiN coated specimen to evaluate the increase of hardness of the insert surface as consequence of the coating deposition process.…”

Section: Nm)mentioning

confidence: 99%

Surface wear of TiN coated nickel tool during the injection moulding of polymer micro Fresnel lenses

et al. 2012

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“…Functions of miniature products are mostly based on their shape, especially for mechanical and optical parts; therefore, the tolerance and accuracy of their dimensions and shapes are strongly related to performances of the parts [1]. On the other hand, various features such as the hydrophilicity and hydrophobicity, optical anti-reflection, and anti-adhesion can be obtained using surface microtextures [2]. Therefore, there is a strong demand for evaluating surface micro-textures along with size and dimensions of micro-parts using the same coordinate.…”

Section: Introductionmentioning

confidence: 99%

Surface Imaging Technique by an Optically Trapped Microsphere in Air Condition

et al. 2018

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Recent advancement of fabrication technologies enables nanoscale surface patterning on microstructures, which requires multi-scale measurements for the determination of their geometric dimensions and surface texture in the same coordinate system. Previously, we have developed a micro-coordinate measuring machine with a laser-trapped microprobe that uses an optically trapped microsphere as a surface detecting sensor. In this paper, we propose a surface imaging technique using the optically trapped microsphere as a micro-lens, i.e., the surface imaging system is integrated into the coordinate measuring system. The optically trapped microsphere with a diameter of 8 lm was brought close to a measured surface to image the surface underneath it. Because there is an unknown gap between the microsphere and surface, the focal plane of the imaging system had to be adjusted to the measured surface by the developed imaging lens system. With the microsphere-based imaging system, an optical diffractive grating of sub-micrometer periodic structure with 417 nm pitch and 50 nm depth was successfully imaged and the defect on the grating was detected. Thus, we verified that development of an imaging system based on the optically trapped microsphere for multi-scale evaluation systems can be accomplished.

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Advances in engineered surfaces for functional performance

Cited by 613 publications

References 207 publications

A New Rig for Testing Textured Surfaces in Pure Sliding Conditions

A New Rig for Testing Textured Surfaces in Pure Sliding Conditions

Surface wear of TiN coated nickel tool during the injection moulding of polymer micro Fresnel lenses

Surface Imaging Technique by an Optically Trapped Microsphere in Air Condition

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