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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Compositional dependence of Young’s moduli for amorphous Cu–Zr films measured using combinatorial deposition on microscale cantilever arrays
Qiang Guo,Qiang Guo,Qiang Guo,Li Zhang,Li Zhang,Adam S. Zeiger,Yat Li,Yat Li,Krystyn J. Van Vliet,Carl V. Thompson,Carl V. Thompson +10 more
TL;DR: Young's moduli of amorphous Cu-Zr thin films have been determined with unprecedented compositional resolution, via combinatorial film deposition and force-deflection measurements of microscale cantilevers.
Journal ArticleDOI
Dynamic testing of micromechanical structures under thermo-electro-mechanical influences
TL;DR: In this paper, a reliable, cost effective non-contact testing system for MEMS characterization is proposed in order to overcome the intrinsic limitations of microfabrication processes and material conditions.
Journal ArticleDOI
Study of mechanical properties of CVD diamond on SiC substrates
TL;DR: In this article, the use of the nanoindentation technique over conventional microhardness tests for reliable measurement of the mechanical properties of chemical vapour deposited (CVD) diamond coatings, as micro-hardness testing resulted in localised damage precluding accurate measurement.
Journal ArticleDOI
Furan resins as replacement of phenolic protective coatings: Structural, mechanical and functional characterization
TL;DR: In this paper, a furan resin based on furfural and phenol was synthesized and used as an aluminum coating, which avoided toxic emissions of formaldehyde, while a biobased derivative was used instead.
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Selection, Enrichment, and Maintenance of Self-Renewal Liver Stem/Progenitor Cells Utilizing Polypeptide Polyelectrolyte Multilayer Films
TL;DR: It is demonstrated that highly tunable polyelectrolyte-multilayer films were suitable for selective enrichment of liver stem/progenitor cells in vitro.
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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