Journal ArticleDOI
Nanoindentation hardness tests using a point contact microscope
TLDR
In this article, different diamond indenters, which are attached to single leaf springs of various stiffnesses, are used to study the effects of tip radius and apex angle on the measured hardness values.Abstract:
The Point Contact Microscope (PCM), developed in NTT's Kaneko Research Laboratory, is used to conduct hardness tests on polycarbonate and gold at indentation depths in the range of about 5-100 nm. Different diamond indenters, which are attached to single leaf springs of various stiffnesses, are used to study the effects of tip radius and apex angle on the measured hardness values. The indentation depth versus force and hardness versus force relations for various tip conditions are examined. It is found that the hardness value obtained increases for small values of indentation load and approaches a tip-independent value for larger loads. The hardness is sensitive to the indentation force and tip radius in the limit of small indentation depthsread more
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Journal ArticleDOI
Scratching the Surface: Fundamental Investigations of Tribology with Atomic Force Microscopy.
TL;DR: The goal of this paper is to demonstrate that AFM is capable of producing atomic-scale knowledge, and to focus upon some of the contributions of the AFM to nanotribology.
Journal ArticleDOI
Surface engineering and microtribology for microelectromechanical systems
TL;DR: In this article, the authors focus on the analysis of various surface micromechanisms, such as solid bridging, liquid meniscus formation, van der Waals force and electrostatic charging, and the significance of surface roughness and material properties.
Journal ArticleDOI
Contact physics of gold microcontacts for MEMS switches
D. Hyman,M. Mehregany +1 more
TL;DR: In this article, the authors present a tribological study of gold metallic contacts regarding contact resistance, heat dissipation, and surface damage in the normal-force regime of tens to hundreds of /spl mu/N, which is typical of the contact forces from microactuation.
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Atomic force microscope measurements of the hardness and elasticity of peritubular and intertubular human dentin
TL;DR: Stiffness imaging revealed that the elastic modulus of the peritubular dentin was spatially homogeneous; whereas, there was considerable spatial variation in the elasticity of the intertubular Dentin.
Journal ArticleDOI
Wear of the AFM diamond tip sliding against silicon
TL;DR: In this paper, it was shown that the assumption that the diamond tip is too hard to be worn by a softer material introduces an error into the value obtained for the tested material's wear rate.