SiC-bonded diamond materials produced by pressureless reactive infiltration of preforms with silicon show high hardness and wear resistance. These properties are due to the relatively volume content approximately 50 vol% mechanically strong interface between SiC. To determine bending strength individual interfaces SiC, micro-cantilevers were prepared focused ion beam milling at 13 grain boundar...

The aim of this study was to quantify the extent of abutment screw loosening and thus understand the role of frictional and wear factors in abutment screw loosening by using a cyclic loading device to compare Diamond Like Carbon (DLC)-coated and non-coated implants. The properties of DLC films, including hardness, wear resistance, chemical stability, and biocompatibility, are similar to those o...

Increasing interest in commercializing functional nanostructured devices heightens the need for cost effective manufacturing approaches for nanostructures. This paper presents an investigation of a scale-up manufacturing approach for nanostructures through diamond turning using a nanoscale multi-tip diamond tool (four tip tool with tip width of 150 nm) fabricated by focused ion beam (FIB). The ...

Ventilated brake discs are used in high speed automobiles. The brake disc is an important component in the braking system which is expected to withstand and dissipate the heat generated during the braking event. In the present work, an attempt is made to study the effect of vane-shape rotor on the flow-field and heat transfer characteristics for different configurations of vanes for different r...

Up to now tools used for machining of concrete are in general not adapted to the particular machining processes. As in mass production tool wear and production time are very cost sensitive factors, filling this lack is of great interest. This paper proposes a geometrical simulation model describing the forces affecting the workpiece as well as the chip removal rate and the wear rate of the used...

In recent years wearable devices have attracted significant attention. Flexibility and stretchability are required for comfortable wear of such devices. In this paper, we report flexible and stretchable touch sensors with two different patterns (interdigitated and diamond-shaped capacitors). The touch sensors were made of screen-printed silver nanowire electrodes embedded in polydimethylsiloxan...

Abstract The friction and wear properties, as well the scuffing resistance, of different piston-ring coatings mating with a chrome-plated cylinder liner were investigated. Interrupted tests under lubricant starvation condition conducted to examine behavior Cr-diamond coating (GDC) diamond-like (DLC). results indicated that DLC had outstanding tribological properties (small coefficient loss) at ...

Radiographic measurement of two-dimensional acetabular cup wear is usually carried out on a series of follow-up radiographs of the patient's pelvis. Since the orientation of the pelvis might not be consistent at every X-ray examination, the resulting change in view of the wear plane introduces error into the linear wear measurement. This effect is amplified on some designs of cup in which the c...

Recent improvements in growth methodologies have decreased the grain sizes and thicknesses of polycrystalline diamond films to the nanometer range, while also increasing the film uniformity and growth rate and preserving the outstanding mechanical properties of diamond. This is rendering such films more technologically and commercially viable. Ultrananocrystalline diamond (UNCD) are the thinnes...

The conformation of circular DNA molecules of various lengths adsorbed in a 2D conformation on a mica surface is studied. The results confirm the conjecture that the critical exponent ν is topologically invariant and equal to the SAW value (in the present case ν = 3/4), and that the topology and dimensionality of the system strongly influences the cross-over between the rigid regime and the sel...