Micromachining Techniques for Fabrication of Micro and Nano Structures Part 10 docx

... evaluated for experimentally observed values of D = 1.38 (Majumdar and Bhushan, 1990) and φ = 0.05 (Bhushan and Doerner, 1989) for disk type C, and an assumed value for G * = 10 10 for curve ... effects of fractal dimension on the real area of contact and elastic contact area is interesting indeed and are shown in Figure 4.32 for G* = 10 10 and φ = 0.0...

Ngày tải lên: 18/10/2013, 09:15

... overview of lubrication studies of polar and nonpolar lubricants and Lang- muir–Blodgett and chemically grafted films, using atomic force/friction force microscopy. 8.2 Nanodeformation, Adhesive Forces, ... Lubrication Studies Using Atomic Force/Friction Force Microscopy Bharat Bhushan 8.1 Introduction 8.2 Nanodeformation, Adhesive Forces, and Molecular Conformation 8.3 Bo...

Ngày tải lên: 18/10/2013, 09:15

... Appl. Phys. 75, 5741–5746. With permission.) Bhushan, B. Micro/ Nanotribology and Micro/ Nanomechanics of Magnetic ” Handbook of Micro/ Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press ... tip radius of 100 nm. The coefficients of friction of unlubricated polished disks and with 1.5-nm-thick lubricant film were 0.5 and 0.4, respectively, and of unlubricated text...

Ngày tải lên: 18/10/2013, 09:15

... speed = 0.9–1.2 m/s; ambient air (RH 45 ± 5%). Bhushan, B. Micro/ Nanotribology and Micro/ Nanomechanics of MEMS ” Handbook of Micro/ Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, ... diamond tip of radius of 100 nm. TABLE 16.3 Surface Roughness and Coefficients of Micro- and Macroscale Friction of Selected Samples Material rms Roughness (nm)...

Ngày tải lên: 25/10/2013, 12:15

... force upon separation of the tip and sample is often referred to as the pull-off force. Unfortunately, measuring the pull-off force does not directly give the work of adhesion. The pull-off force ... Bowden and Tabor (1950, 1964) understood the friction and wear of metal–metal sliding in terms of the plastic deformation of asperity contacts. 5.5.2 Outlook Part of the excit...

Ngày tải lên: 09/11/2013, 03:15

... Israelachvili and Alan D. Berman 9.1 Introduction 9.2 Methods for Measuring Static and Dynamic Surface Forces Adhesion Forces • Force Laws • The Surface Force Apparatus and the Atomic Force Microscope ... Effects of Surface Structure • Effect of Surface Curvature and Geometry 9.5 Thermal Fluctuation Forces: Forces between Soft, Fluidlike Surfaces 9.6 Hydration Forces...

Ngày tải lên: 17/12/2013, 11:15

... of holes. With higher forces, we observe that particles of hydrocarbons are pulled out and sheared out of the scanning area while the fluorocarbons remain undeformed. Control films of pure AA and ... approximations. 6.4.2 Deformation of Tip and Sample The deformation of tip and sample is fundamental to the adhesion and friction of any contact, including the special case...

Ngày tải lên: 25/12/2013, 23:18

... Micro/ Nanoscratch Technique 10. 6 Nanoindentation and Microscratch Techniques for Adhesion Measurements, Residual Stresses, and Materials Characterization of Thin Films Adhesion Strength and ... valid for small deflection of a thin film: (10. 17) FIGURE 10. 30 Schematic of a cantilever microbeam deflected by nanoindenter loading mechanism for measure- ment of modulus...

Ngày tải lên: 25/12/2013, 23:18

... atomic layers). These structures are generally lubricated with molecularly thin films. Micro- and nanotribological techniques are ideal for studying the friction and wear processes of micro- and nanostructures. ... normal spring constant of 0.007 N/m and torsional spring constant of 0.72 N/m, which gives a lateral force sensitivity of 10 pN and an angle of resolut...

Ngày tải lên: 23/01/2014, 04:20

... cast the normal force is simply the average of the forces in the forward and backward direction. The force form the front, F Fr , is the difference of the forces measured in forward and backward ... 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...

Ngày tải lên: 27/01/2014, 14:20