Effects of the substrate on the determination of thin film mechanical properties by nanoindentation

Saha, Rajarshi; Nix, William D.

doi:10.1016/s1359-6454(01)00328-7

Cited by 1,362 publications

(702 citation statements)

References 35 publications

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“…at h/t $ 0.01 [26]. Therefore, it is difficult to estimate directly the elastic modulus only from indentation data in which case different models could be used to provide this information [27].…”

Section: Analysis Of the Elastic Modulusmentioning

confidence: 99%

Tribological response of AA 2024-T3 aluminium alloy coated with a DLC duplex coating

Staia

Puchi-Cabrera

Iost

et al. 2015

Tribology International

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Quantitative EPMA analysis carried out on the coated sample cross-section coupled with nanoindentation techniques allowed the identification of the coated system architecture as composed of 4 main layers, with distinct mechanical properties, on top of the aluminium substrate: DLC (a:C-H chromium dopped layer and graded layer of CrC), a newly formed graded layer of CNiPCr, product of the interdifusion during PVD processing, and the NiP coating. The change in the elastic modulus with penetration depth was described by means of an original approach that was developed for its specific application to multilayer coatings.

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Section: Analysis Of the Elastic Modulusmentioning

confidence: 99%

Tribological response of AA 2024-T3 aluminium alloy coated with a DLC duplex coating

Staia

Puchi-Cabrera

Iost

et al. 2015

Tribology International

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“…This uncertainty was a motivation to make use of the residual imprint and develop a method to estimate the true contact area in the performed nanoindentation tests. In the proposed method, classified as a post mortem method, [28], the imprints were measured using AFM and then the Hommel Map commercial software was applied to work out the acquired images. The measured area was leveled using the least squares method-in the first step the reference plane was determined as a best fit to the whole measured area (the points in the imprint were excluded from the best fit procedure).…”

Section: Specification Of the Contact Area With Use Of Post-mortem Mementioning

confidence: 99%

“…To examine the residual impression in Au and Al thin films SEM and AFM were used by Zhou et al [27]. They also applied a quantitative approach to deal with the problems with estimating the real contact area, which was developed by Saha and Nix [28]. It was called 'the constant modulus assumption analysis'.…”

Section: Introductionmentioning

confidence: 99%

“…The basic assumption of this method is that the Young's modulus is independent of the contact area and the contact depth. The hardness can be determined from a measurement of both the load, P and the contact stiffness, S. Zhou et al [27] as well as Saha and Nix [28] used a Berkovich indenter in their experiments. Finally, the large review of experimental techniques for the examination of residual imprints was presented in [29].…”

Section: Introductionmentioning

confidence: 99%

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Decrease of Nano-hardness at Ultra-low Indentation Depths in Copper Single Crystal

et al. 2015

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In the present study, we report a detailed investigation of the unusual size effect in single crystals. For the experiments we specified the hardness in single crystalline copper specimens with different orientations ( (001), (011) and (111)) using Oliver-Pharr method. Our results indicates that with decreasing load, after the value of the hardness reached its maximum, it starts to decrease for very small indentation depths (<150 nm). For the sake of accuracy of hardness determination we have developed two AFM-based methods to evaluate contact area between tip and indented material. The proposed exact measurement of the contact area, which includes the effect of pile-up and sink-in patterns, can partially explain the strange behaviour, however, the decrease of hardness at low loads is still observed. At higher loads range the specified hardness is practically constant.

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“…Wong et al (1997) proposed an experimental setup to examine the elastic properties of nanostructures, the principle of which is based on a continuum beam model. Continuum mechanics models have also been adopted in the study of nanoindentation (Saha and Nix, 2002) and the mechanics of graphene (Young et al, 2012;Liu et al, 2013). Note that the applicability of the conventional continuum beam models in the mechanics of nanotubes and nanorods has been previously discussed by Harik (2001).…”

Section: Mechanics Gets Closer To Quantum Mechanicsmentioning

confidence: 99%

The renaissance of continuum mechanics

Chen

2014

J. Zheijang Univ.-Sci.

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Continuum mechanics, just as the name implies, deals with the mechanics problems of all continua, whose physical (or mechanical) properties are assumed to vary continuously in the spaces they occupy. Continuum mechanics may be seen as the symbol of modern mechanics, which differs greatly from current physics, the two often being mixed up by people and even scientists. In this short paper, I will first try to give an illustration on the differences between (modern) mechanics and physics, in my personal view, and then focus on some important current research activities in continuum mechanics, attempting to identify its path to the near future. We can see that continuum mechanics, while having a dominating impact on engineering design in the 20th century, also plays a pivotal role in modern science, and is much closer to physics, chemistry, biology, etc. than ever before.

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Effects of the substrate on the determination of thin film mechanical properties by nanoindentation

Cited by 1,362 publications

References 35 publications

Tribological response of AA 2024-T3 aluminium alloy coated with a DLC duplex coating

Tribological response of AA 2024-T3 aluminium alloy coated with a DLC duplex coating

Decrease of Nano-hardness at Ultra-low Indentation Depths in Copper Single Crystal

The renaissance of continuum mechanics

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