Surface microgeometry

Kuznetsov, A.M. and Simonov, I.V., The Surface Microgeometry of Bores Broach Burnished Employing Solid Lubricants in Cold Metal Forming, Soviet Engng. Res., 2, 45, (1982). 

Aebischer, P., Guenard, V., and Valentini, R. F. (1990), The morphology of regenerating peripheral nerves is modulated by the surface microgeometry of polymeric guidance channels. Brain Res. 531(1-2) 211-218. 

The force of adhesion for particles with a diameter of 20 pm, as calculated by the use of Eq. (11.24), will fall within limits of 0.7 to 2 dyn, which is also very close to the values determined by the use of Eq. (V.8). The coincidence of the calculated values of the adhesive force enables us to consider that the equivalent radius of curvature of the surface is indeed a characteristic of the surface microgeometry, and that the introduction of this quantity into Eqs. (11.24), (V.8), and (V.9) opens up the possibiUty of qualitative and quantitative evaluations of the adhesive interaction of condensed systems. 

Losi, R, et al. Luminal surface microgeometry affects platelet adhesion in smtdl-diameter synthetic grafts. Biomaterials 25(18), 4447-4455 (2(X)4)... 

Mitra, P. P., and Sen, P. N. (1992). Effects of microgeometry and surface relaxation on NMR pulsed-field-gradient experiments Simple pore geometries. Phys. Rev. B 45, 143-156. 

The variation of temperature near the bounding wall continues to be a major determinant of heat transfer though the surface. However, when the continuum approach breaks down, tlie conventional Newton s taw of cooling using wall and bulk fluid temperature needs to be modified. Specifically, unlike in macroscale objects where the wall and adjacent fluid temperatures arc equal (T = Tg), in a micro device there is a temperature slip and the two values are different. One well-known relation for calculating the temperature jump at the wall of a microgeometry was derived by vonSmoluchowski in 1898,... 

Process outputs are the effect variables. They can be measured at the workpiece (deviations in dimension, shape and position, microgeometry, physical influence on the surface zone), at the tool (wear), at the machine tool (temperature rise, wear), and in the cutting fluids (temperature rise, contamination, and chemical properties). They can be used to describe the effects of the process. From the process interactions and the... 

The quantity p can be considered as a characteristic of the microgeometry of the rough surface. By the use of this concept, we can regard the adhesive interaction between a smooth spherical particle and a rough surface as an interaction between two spheres with radii r and p, where the quantity p takes into account both the ordinary roughness and the roughness at the atomic-molecular level. The force of adhesion in this case will be proportional to the parameter rp/(r + p). 

The experimental measurement of topographies aeross the whole seale-size of interest, often extending from the nanometer to the millimeter range, is generally impaired by distortion of the true surfaee profiles [30] (e.g., envelope system [31], limited lateral and/or vertical resolution and accessibility of surface features) and by artefacts (e.g., deformation of surface in contact-type measurements [32], optical artefacts in laser non-contact type measurements because of microgeometry, inclination and reflectivity of the surface [33,34]). The conclusion is that often a combination of different experimental techniques with different advantages/limitations is mandatory in order to get the best possible data [35]. 

Chen H, Elkasabi Y, Lahann J Surface modification of confined microgeometries via vapor-deposited polymer coatings, J Am Chem Soc 128 374—380, 2006. 

The titanium implant surface consists of a thin oxide layer and the biological fluid of water molecules, dissolved ions, and biomolecules (proteins with surrounding water shell) as shown in Figure 38.7. The microarchitecture (microgeometry, roughness, etc.) of the surface and its chemical compositions are important due to the following reasons ... 

S.R. Frenkel, J. Simon, H. Alexander, M. Dennis, J.L. Ricci, Osseointegration on metallic implant surfaces effects of microgeometry and growth factor treatment, J. Biomed. Mater. Res. Appl. Biomater. 63 (2002) 706-713. 

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