Journal ArticleDOI
Effects of the substrate on the determination of thin film mechanical properties by nanoindentation
Ranjana Saha,William D. Nix +1 more
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In this paper, the effects of the substrate on the determination of mechanical properties of thin films by nanoindentation were examined, and the properties of aluminum and tungsten films on the following substrates: aluminum, glass, silicon and sapphire.About:
This article is published in Acta Materialia.The article was published on 2002-01-08. It has received 1410 citations till now. The article focuses on the topics: Nanoindentation & Elastic modulus.read more
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RF-magnetron sputter deposited hydroxyapatite-based composite & multilayer coatings: A systematic review from mechanical, corrosion, and biological points of view
TL;DR: In this paper, a review of the reported results in the field of RFMS'ed HAp-based composite and multilayer bio-coatings with putting the stress on drawing a clear correlation between the assessed variables, e.g. chemical composition and content of reinforcing phase(s) and interlayer(s), operating conditions, pre/post treatments, and the final characteristics of the bio-coating.
Journal ArticleDOI
Investigation on methods for dealing with pile-up errors in evaluating the mechanical properties of thin metal films at sub-micron scale on hard substrates by nanoindentation technique
TL;DR: In this paper, two quantitative approaches are proposed to deal with the significant errors produced during evaluating the mechanical properties of soft metal films on hard substrates by using nanoindention technique, which depend on calculating actual contact area (CACA: area) and correcting contact depth errors (CCDE: depth).
Journal ArticleDOI
AFM-based force spectroscopy for bioimaging and biosensing
TL;DR: This review of recent studies on how to utilize AFM-FS to investigate the interactions between biomolecules and materials interfaces at the single-molecule level expects that this work will be helpful for researchers to understand fundamental molecular interactions and to gain insights into the biological functions of various bio-hybrid materials.
Journal ArticleDOI
Surface hydration and nanoindentation of silicate glasses
Damir R. Tadjiev,Russell J. Hand +1 more
TL;DR: In this paper, the effect of hydration on the near-surface mechanical properties of glasses with varying degrees of chemical durability was investigated and it was shown that hydration has little if any effect on high durability glasses even at long immersion times, whereas in low durable glasses hydration reduces the near surface mechanical properties significantly and the thickness of hydrated layer may exceed the indentation depth.
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Effects of nanoscale thickness and elastic nonlinearity on measured mechanical properties of polymeric films
Binu Oommen,K. J. Van Vliet +1 more
TL;DR: In this paper, a modified Hertzian contact model was proposed to predict the elastic stiffness of polymeric films of nanoscale (b100nm) thickness from scanning probe microscope-enabled nanoindentation experiments.
References
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Journal ArticleDOI
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments
Warren C. Oliver,George M. Pharr +1 more
TL;DR: In this paper, the authors used a Berkovich indenter to determine hardness and elastic modulus from indentation load-displacement data, and showed that the curve of the curve is not linear, even in the initial stages of the unloading process.
Journal ArticleDOI
The relation between load and penetration in the axisymmetric Boussinesq problem for a punch of arbitrary profile
TL;DR: In this article, a solution of the axisymmetric Boussinesq problem is derived from which are deduced simple formulae for the depth of penetration of the tip of a punch of arbitrary profile and for the total load which must be applied to the punch to achieve this penetration.
Journal ArticleDOI
Indentation size effects in crystalline materials: A law for strain gradient plasticity
William D. Nix,Huajian Gao +1 more
TL;DR: In this article, the indentation size effect for crystalline materials can be accurately modeled using the concept of geometrically necessary dislocations, which leads to the following characteristic form for the depth dependence of the hardness: H H 0 1+ h ∗ h where H is the hardness for a given depth of indentation, h, H 0 is a characteristic length that depends on the shape of the indenter, the shear modulus and H 0.
Journal ArticleDOI
Mechanism-based strain gradient plasticity— I. Theory
TL;DR: In this paper, a mechanism-based theory of strain gradient plasticity is proposed based on a multiscale framework linking the microscale notion of statistically stored and geometrically necessary dislocations to the mesoscale notion of plastic strain and strain gradient.
Journal ArticleDOI
Influences of pileup on the measurement of mechanical properties by load and depth sensing indentation techniques
Alexei Bolshakov,George M. Pharr +1 more
TL;DR: In this article, the authors used finite element simulation of conical indentation of a wide variety of elastic-plastic materials to investigate the influences of pileup on the accuracy with which hardness and elastic modulus can be measured by load and depth-sensing indentation techniques.
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