Effects of surface properties such as roughness and energy are critical for determining the biocompatibility all types biomaterials, in case biomedical alloys. Recently, microstructure induced changes have started attracting attention property related analysis metals. The current study mainly aims to focus on effects micro modification metallic order get an understanding underlying mechanisms t...

Direct shear tests were performed to study the influence of concrete–rock bonds and roughness on behavior interfaces. The results these show that concrete–hardrock interfaces depends micro-roughness driving formation strong macro-roughness accounting for surfaces interlocking. Based this outcome recent literature, a cohesive frictional model is used simulate direct bonded concrete–granite with ...

We propose a long-term parameterization scheme for two critical parameters, zero-plane displacement height (d) and aerodynamic roughness length (z0m), that we further use in the Surface Energy Balance System (SEBS). A sensitivity analysis of SEBS indicated that these two parameters largely impact the estimated sensible heat and latent heat fluxes. First, we calibrated regression relationships b...

An approximate analytical model was developed to estimate scalar ̄ux footprint in thermally strati®ed atmospheric surface layer ̄ows. The proposed model was based on a combination of Lagrangian stochastic dispersion model results and dimensional analysis. The main advantage of this model is its ability to analytically relate atmospheric stability, measurement height, and surface roughness length...

Nowadays there is an increased need to know the nanotribological properties of protective coatings used in part devices operating under nanoand micro-contact situations, e.g. hard disk drives, magnetic heads, micro-electromechanical systems (MEMS) and microsensors, etc. Therefore there is a demand for instruments and methods testing friction and wear at the nanoand micro-scales. In this work we...

Abstract The flat plane of small surface roughness below 0.1 µ m average was obtained for monocrystalline diamond by nanosecond pulsed laser irradiation 1060 nm and post-process acid cleaning, at a fluence around the material removal threshold value. glossy bottom micro-groove parallel to top specimen, although round beam Gaussian mode irradiated in direction perpendicular specimen. square top-...

Recently, the magnetorheological (MR) polishing process has been examined asa new ultra-precision polishing technology for micro parts in MEMS applications. In theMR polishing process, the magnetic force plays a dominant role. This method uses MRfluids which contains micro abrasives as a polishing media. The objective of the presentresearch is to shed light onto the material removal mechanism u...

Degradation of gold contacts in micro-switches was studied under an extensive range of operation conditions including high-electric-field ac/dc hot switching, low-electric-field hot switching and cold switching. Tests were conducted in a unique experimental switching operation set-up. Gold micro-contacts were characterized by an atomic force microscope. It was found that a unique material trans...