Handbook of chemistry and physics

Handbook of Micro and Nano Tribology P4

... theories of friction and wear can be developed if the size and the spatial distributions of the contact spots are known The size of contact spots ranges from nanometers to micrometers, making tribology ... distribution of islands on Earth’s surface follows the power law N(a) ≈ a–D/2, where N is the total number of islands with area larger than a and D is the fractal dimension of the coastline of the islands ... of fractal model and experiments of Yamada et al (1978) FIGURE 4.34 Comparison among predictions of the fractal model, the GW model, and experiments of Bhushan and Dugger (1990) for contact of...

Handbook of Micro and Nano Tribology P8

... of lubrication studies of polar and nonpolar lubricants and Langmuir–Blodgett and chemically grafted ﬁlms, using atomic force/friction force microscopy 8.2 Nanodeformation, Adhesive Forces, and ... dense ﬁlms of long-chain molecules Bhushan et al (1995b,c) conducted micro- and macroscale friction and wear studies on single-grafted and double-grafted octodecyl (C18) and LB ﬁlms and their ... of the ODT (C18) and docosyl (C22) grafted ﬁlm on silica Schematic of the zinc arachidate LB ﬁlm on ODT with a gold underlayer TABLE 8.1 Typical rms Roughness and Coefﬁcients of Microscale and...

Handbook of Micro and Nano Tribology P14

... and Adhesion Nanoscale Friction • Microscale Friction and Adhesion 14.5 Scratching and Wear Nanoscale Wear • Microscale Scratching • Microscale Wear 14.6 Indentation Picoscale Indentation • Nanoscale ... 14 Micro/ Nanotribology and Micro/ Nanomechanics of Magnetic Storage Devices Bharat Bhushan 14.1 Introduction 14.2 Experimental Experimental Apparatus and Measurement Techniques ... Introduction Micro/ nanotribological studies are needed to develop fundamental understanding of interfacial phenomena on a small scale and to study interfacial phenomena in micro- and nanostructures...

Handbook of Micro and Nano Tribology P16

... Mechanics and Reliability of Flexible Magnetic Media, Springer-Verlag, New York Bhushan, B (1995), Handbook of Micro/ Nanotribology, CRC, Boca Raton, FL Bhushan, B (1996a), Tribology and Mechanics of ... review of macro- and micro/ nanotribological studies of single-crystal silicon and polysilicon, oxidized and implanted silicon, doped and undoped polysilicon ﬁlms and SiC ﬁlms A summary of limited ... friction and wear data of virgin, coated, and © 1999 by CRC Press LLC TABLE 16.2 rms, Microfriction, Microscratching/Microwear and Nanoindentation Hardness Data for Various Virgin, Coated, and Treated...

Handbook of Micro and Nano Tribology P5

... chemical and mechanical properties of the surface and near-surface region of the tip and sample determine the adhesive behavior A compliant tip–sample system of large curvature radius and large ... of JKRS theory, and the pull-off force goes to –1.5πRϖ For the limit of λ equals zero, the system responds like the DMT mechanics, and the pull-off force approaches –2πRϖ Measuring the pull-off ... References Bhushan, B (1997), Micro/ Nanotribology and Its Applications, Vol E330, Kluwer Academic, Dordrecht Bowden, F P., and Tabor D (1950, 1964), The Friction and Lubrication of Solids, Parts I & II...

Tài liệu Handbook of Micro and Nano Tribology P9 pptx

... Hysteresis Rheology of Molecularly Thin Films: Nanorheology Different Modes of Friction: Limits of Continuum Models • Viscous Forces and Friction of Thick Films: Continuum Regime • Friction of Intermediate ... diameters (Snook and van Megan, 1979, 1980, 1981; van Megan and Snook, 1979, 1981; Kjellander and Marcelja, 1985a,b; Tarazona and Vincente, 1985; Henderson and Lozada-Cassou, 1986; Evans and Parry, ... the surface and interfacial energies of planar surfaces as well as the strengths of materials and adhesive junctions Adhesion forces are often strong enough to deform the shapes of two bodies...

Tài liệu Colchero, J. et al. “Friction on an Atomic Scale”Handbook of Micro and Nano Tribology P6 Handbook of Micro/Nanotribology. Ed. Bharat ppt

... Films and Boundary Lubrication • Nanocontacts • Quartz Microbalance Experiments in Tribology 6.4 Modeling of an SFFM Resolution in SFFM • Deformation of Tip and Sample • Modeling of SFM and SFFM: ... Akamine et al., 1990; Wolter et al., 1991) and, on the other hand, to new detection schemes, in particular to the optical beam deﬂection method (Meyer and Amer, 1988, 1990b; Alexander et al., 1989; ... aspects of friction on an atomic scale (Zhong and Tománek, 1990; Tománek et al., 1991; Colchero and Marti, 1995; Colchero et al., 1996b; Gyalog et al., 1995) These models can be considered an extension...

Tài liệu Handbook of Micro and Nano Tribology P10 pptx

... Measurement • Determination of Hardness and Modulus of Elasticity of Thin Films from the Composity Response of Film and Substrate 10.4 Examples of Measured Mechanical Properties of Engineering Materials ... Measurements • Hardness and Elastic Modulus Measurements 10.5 10.6 Microscratch Resistance Measurement of Bulk Materials Using Micro/ Nanoscratch Technique Nanoindentation and Microscratch Techniques ... Press LLC FIGURE 10.30 Schematic of a cantilever microbeam deﬂected by nanoindenter loading mechanism for measurement of modulus of elasticity and yield strength of microbeam material (From Weihs,...

Tài liệu Handbook of Micro and Nano Tribology P1 ppt

... Micro- and nanotribological techniques are ideal for studying the friction and wear processes of micro- and nanostructures Although micro/ nanotribological studies are critical to study micro- and nanostructures, ... Techniques and Applications Bharat Bhushan 1.1 1.2 1.3 History of Tribology and Its Signiﬁcance to Industry Origins and Signiﬁcance of Micro/ Nanotribology Measurement Techniques Scanning Tunneling Microscope ... present examples of why micro/ nanotribological studies are important in magnetic storage devices, MEMS, and other microcomponents 1.1 History of Tribology and Its Signiﬁcance to Industry Tribology is...

Tài liệu Handbook of Micro and Nano Tribology P2 ppt

... square pulse of width 12 between 310 and 356, a triangle of period 40 between 356 and 396, a triangle of period 20 between 400 and 420, a triangle of period 12 between 430 and 442, and, ﬁnally, ... plate area A of 20 µm by 40 µm and a separation of µm, one obtains a capacitance of 31 fF (neglecting stray capacitance and the capacitance of the connection leads) and a dC/dx of 3.1 × 10–8 ... other hand, forces of the order of 10 to N destroy some biological samples 2.2 The Mechanics of Cantilevers 2.2.1 Compliance and Resonances of Lumped Mass Systems Any one of the building blocks of...

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Tài liệu Handbook of Micro and Nano Tribology P3 pptx

... description of issues and techniques in the physics of surfaces of interest in nanotribology This ﬁeld of research is exceedingly difﬁcult with the effects of a wide variety of materials and phenomena ... the disparity between true area of contact and apparent area of contact and the tracking of friction force with load, since the asperities and thus the true area of contact change with asperity ... comprehensive understanding of tribology at the nanoscale It is hoped that the demonstrations in this chapter and in this volume indicate that there is the possibility of gaining rational understanding leading...

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