On the variation of mechanical parameters obtained from spherical depth sensing indentation

Oumarou, Noura; Jehl, J-Ph.; Kouitat, R.; Stempfle, Ph.

doi:10.1504/ijsurfse.2010.035144

Cited by 10 publications

(13 citation statements)

References 24 publications

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“…The mechanical properties of the PDMS thin films were evaluated using Oliver and Pharr’s theory and further analyzed using the indentation experiment data [ 33 ]. Among the various formulas depending on the shape of the indenter tip, we utilized the elastomer specimen formula [ 33 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

Assessment of the Physical, Mechanical, and Tribological Properties of PDMS Thin Films Based on Different Curing Conditions

2021

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Polydimethylsiloxane (PDMS), a silicone-based elastomeric polymer, is generally cured by applying heat to a mixture of a PDMS base and crosslinking agent, and its material properties differ according to the mixing ratio and heating conditions. In this study, we analyzed the effects of different curing processes on the various properties of PDMS thin films prepared by mixing a PDMS solution comprising a PDMS base and a crosslinking agent in a ratio of 10:1. The PDMS thin films were cured using three heat transfer methods: convection heat transfer using an oven, conduction heat transfer using a hotplate, and conduction heat transfer using an ultrasonic device that generates heat internally from ultrasonic vibrations. The physical, chemical, mechanical, and tribological properties of the PDMS thin films were assessed after curing. The polymer chains in the PDMS thin films varied according to the heat transfer method, which resulted in changes in the mechanical and tribological properties. The ultrasonicated PDMS thin film exhibited the highest crystallinity, and hence, the best mechanical, friction, and wear properties.

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Section: Resultsmentioning

confidence: 99%

Assessment of the Physical, Mechanical, and Tribological Properties of PDMS Thin Films Based on Different Curing Conditions

2021

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“…This value corresponds to the actual zero-wear vertical position. It can be computed by means of numerical simulation [47][48][49] -as a classical indentation problem of spherical punch on flat sample -as soon as the mechanical properties of each of the contact antagonists are known (i.e., ball, coating and substrate in a general case).…”

Section: Triboscopic Approachmentioning

confidence: 99%

“…5c, the film and the substrate are both modeled as an elastic-plastic medium with a bi-linear stress-strain law -i.e. with three parameters: (i) the Young modulus E, (ii) the yield stress Y, and (iii) the strain hardening factor K -enabling to model both soft and hard coatings [63,49]. Since the load applied on the punch is small enough -several tens of mN -the problem can be treated within the framework of the small perturbation hypothesis of the classical continuum mechanics [64].…”

Section: Multiscale Numerical Simulationsmentioning

confidence: 99%

“…Since the load applied on the punch is small enough -several tens of mN -the problem can be treated within the framework of the small perturbation hypothesis of the classical continuum mechanics [64]. The plastic problem is treated by the radial return algorithm, which is an implicit strategy based on the concept of consistent tangent operator insuring a good convergence during the identification process [49]. The classical approach requiring volume cells limited to part of the medium where plastic flow is expected is implemented as mentioned in [64] and shown in Fig.…”

Section: Multiscale Numerical Simulationsmentioning

confidence: 99%

“…6a) provided by CSM Instruments (Switzerland) [15,49]. It is composed of two elements: an instrumented nanoindenter and a display system combining an AFM head (SIScan ProULTRAObjective) and an optical microscope (enlargements Â 50 and Â 1000).…”

Section: Nanoindentationmentioning

confidence: 99%

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On the variation of mechanical parameters obtained from spherical depth sensing indentation

Cited by 10 publications

References 24 publications

Assessment of the Physical, Mechanical, and Tribological Properties of PDMS Thin Films Based on Different Curing Conditions

Assessment of the Physical, Mechanical, and Tribological Properties of PDMS Thin Films Based on Different Curing Conditions

In situ running-in wear assessment in multi-asperity nanotribology

Unprecedented Multifunctionality in Novel Monophase Micro/Nanostructured Ti‐Zn Alloy

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