Young modulus dependence of nanoscopic friction coefficient in hard coatings

Brune, Harald

doi:10.1063/1.1609234

Cited by 71 publications

(36 citation statements)

References 17 publications

(19 reference statements)

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“…It is well known that elastically hard solids tend to exhibit smaller sliding friction than (elastically) soft materials [8]. One extreme example is diamond, which under normal circumstances exhibits very low kinetic friction coefficient, of the order of 0.01, when diamond is sliding on diamond.…”

Section: Introductionmentioning

confidence: 99%

Role of surface roughness in superlubricity

Tartaglino

Самойлов

Persson

2006

J. Phys.: Condens. Matter

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We study the sliding of elastic solids in adhesive contact with flat and rough interfaces. We consider the dependence of the sliding friction on the elastic modulus of the solids. For elastically hard solids with planar surfaces with incommensurate surface structures we observe extremely low friction (superlubricity), which very abruptly increases as the elastic modulus decreases. We show that even a relatively small surface roughness may completely kill the superlubricity state.

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Section: Introductionmentioning

confidence: 99%

Role of surface roughness in superlubricity

Tartaglino

Самойлов

Persson

2006

J. Phys.: Condens. Matter

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“…From this figure, it is seen that the friction coefficient decreases nonlinearly with increasing temperature. At high temperature, desorption of water from environmental humidity leads to decrease the meniscus force (which is a major contributor to the adhesive force), and the friction between the AFM tip and the investigated sample (Bhushan 2005;Kapila et al 2006;Liu and Bhushan 2003;Riedo and Brune 2003). As the temperature is increased, the force needed to shear the contacting junctions where adhesion occurs decreases, respectively, and the tip jump the surface potential barriers more easily, resulting in lower shear strength and hence lower friction force and friction coefficient (Kapila et al 2006).…”

Section: Variation Of Adhesion and Friction Forces As A Function Of Tmentioning

confidence: 99%

“…To estimate the friction coefficient, friction force should be divided by the sum of applied normal load F AFM (given by the bending of AFM probe) and intrinsic adhesive force F adh (Bhushan 2003;Kapila et al 2006;Riedo and Brune 2003;Schonherr et al 2008).…”

Section: Variation Of Adhesion and Friction Forces As A Function Of Tmentioning

confidence: 99%

Mechanical and tribological characterization of a thermally actuated MEMS cantilever

2012

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The temperature effect on the mechanical and tribological behaviors of a microelectromechanical systems cantilever is experimentally investigated using an atomic force microscope. A nonlinear variation of the bending stiffness of microcantilevers as a function of temperature is determined. The variation of the adhesion force between the tip of atomic force microscope (AFM) probe (Si 3 N 4 ) and the microcantilever fabricated in gold is monitored at different temperatures. Using the lateral mode operation of atomic force microscope, the influence of temperature on friction coefficient between the tip of AFM probe and microcantilever is presented. Finite element analysis is used to estimate the thermal field distribution in microcantilever and the axial expansion.

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“…Owing to the large surface to volume ratio, friction at contact is of fundamental importance for reliability of micro/nano-devices, such as NEMS and hard-disk drives [6,7]. It has been reported that there was a transition of frictional shear strength, decreasing by almost one order of magnitude as the contact radii shrank into the nanoscale range [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterization of High Aspect Ratio Silicon Nanolines

Huang¹,

Zhao

Luo

et al. 2008

MRS Proc.

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In this study, we performed nanoindentation experiments on two sets of silicon nanolines (SiNLs) of widths 24 nm and 90 nm, respectively, to investigate the mechanical behavior of silicon structures at tens of nanometer scale. The high height-to-width aspect ratio (∼15) SiNLs were fabricated by an anisotropic wet etching (AWE) method, having straight and nearly atomically flat sidewalls. In the test, buckling instability was observed at a critical load, which was fully recoverable upon unloading. It was found that friction at the contact between the indenter and SiNLs played an important role in the buckling response. Based on a finite element model (FEM), the friction coefficient was estimated to be in a range of 0.02 to 0.05. The strain to failure was estimated to range from 3.8% for 90 nm lines to 7.5% for 24 nm lines.

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Young modulus dependence of nanoscopic friction coefficient in hard coatings

Cited by 71 publications

References 17 publications

Role of surface roughness in superlubricity

Role of surface roughness in superlubricity

Mechanical and tribological characterization of a thermally actuated MEMS cantilever

Mechanical Characterization of High Aspect Ratio Silicon Nanolines

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