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
Citations
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A study of the tribological behaviour of CrN, Graphit-iC and Dymon-iC coatings under oil lubrication
J. Stallard,D.G. Teer +1 more
TL;DR: In this article, the authors compared two carbon-based coatings (TCL Graphit-Ic and Dymon-ic) which have already been shown to exhibit very high sliding wear resistance and low friction in dry conditions, compared to a CrN coating in oil-lubricated conditions.
Journal ArticleDOI
Indentation Depth Dependent Mechanical Behavior in Polymers
Farid Alisafaei,Chung-Souk Han +1 more
TL;DR: In this paper, the indentation size effects of polymers are addressed, where their depth dependent deformation is reviewed along with the rationale provided in the literature, and the experimental results are far sparser and there does not seem a common ground for their rationales.
Journal ArticleDOI
Mechanical properties of atomic layer deposition-reinforced nanoparticle thin films
TL;DR: It is found that the hardness and modulus of ultrathin ALD layers (<5 nm) can be estimated from the mechanical properties of ALD-reinforced NTFs using a simple mixing rule.
Journal ArticleDOI
Mechanical Properties of Au Supracrystals Tuned by Flexible Ligand Interactions
Mélanie Gauvin,Mélanie Gauvin,Yanfen Wan,Yanfen Wan,Imad Arfaoui,Imad Arfaoui,Marie-Paule Pileni,Marie-Paule Pileni +7 more
TL;DR: In this paper, the properties of face cubic centered colloidal crystals obtained out of equilibrium by solvent evaporation of coated Au nanocrystals suspension, called supracrystals, are reported as a function ligand chain length (n) and interparticle edge-to-edge distance within the supracerystals (δpp) for two nanocrystal sizes.
Journal ArticleDOI
Quantitative Impact Testing of Energy Dissipation at Surfaces
Georgios Constantinides,Georgios Constantinides,Catherine A. Tweedie,Nikos Savva,J. F. Smith,K. J. Van Vliet +5 more
TL;DR: In this paper, an impact is generated by imparting energy to a pendulum carrying an indenter, which then swings towards a specimen surface, and the pendulum displacement as a function of time x(t) is recorded, from which one can extract the maximum material penetration, residual deformation, and indentation durations.
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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