This research aimed at an increase in wear resistance of round cutting plates manufactured with SiAlON dielectric ceramics through deposition wear-resistant coatings. To effectiveness the coatings, their adhesion was improved by removal defective surface layers from before deposition. As depth caverns and grooves appearing on due to manufacturing diamond grinding reached 5 µm, a concentrated be...

Nowadays, application of cermet coatings deposited by High-Velocity Oxygen-Fuel (HVOF) has received considerable attention in a variety of industries. Carbide coatings have high surface roughness, so it is essential to grind the coated surface. The present investigation studied the effect of simultaneous changes in the grinding parameters including the depth of cut, feed rate and cutting sp...

The mechanochemical preparation of highly functionalized 3,5-disubstituted hydantoins was investigated in the presence of various poly(ethylene) glycols (PEGs), as safe grinding assisting agents (liquid-assisted grinding, LAG). A comparative study under dry-grinding conditions was also performed. The results showed that the cyclization reaction was influenced by the amount of the PEG grinding a...

objectives: this study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (µtbs) of composite resin to normal and fluorotic enamel after microabrasion. materials and methods: fifty non-carious anterior teeth were classified into two groups of normal and fluorotic (n=25) using thylstrup and fejerskov index (tfi...

Developing an observation method for distributing sub-surface damage (SSD) on large-diameter 4H-SiC bulk wafers formed by mechanical processing can significantly improve the epitaxial and growth processes. This study used a novel laser light scattering (LLS) technique to observe SSD distribution 6-inch (0001) wafer. As result, intensity distributions similar grinding lap-polishing traces shape ...

This research studied the effect of channel roughness on micro-droplet distributions in internal minimum quantity lubrication for effective machining. Mixtures different oils and air were flown though channels with simulated roughness: as fabricated, partially threaded, fully threaded. The airborne droplets collected, analyzed, compared results by computational fluid dynamics. For low-viscous l...

porous silicon samples were prepared by electrochemical etching method for different etching times. the structural properties of porous silicon (ps) samples were determined from the atomic force microscopy (afm) measurements. the surface mean root square roughness (σ rms) changes as function of porosity were studied, and the influence of etching time on porosity and roughness was studied too. u...

Recent developments in grinding have opened up new avenues for finishingof hard and brittle materials with Nano-surface finish, high tolerance and accuracy.Grinding with super abrasive diamond wheels is an excellent way to produce ultraprecision surface finish. However, super abrasive diamond grits need higher bondingstrength while grinding, which metal-bonded grinding wheels ca...

conputer pror,rae1 descrihed for practical optinization plun?;e grindin>; on steels. Tl1e program based on a strategy desiv,ned to o;Hi!'1ize both the grinding and dress "~nr, <Jara!'1eters maxil'1um metal removal rate, to constraints of surface finish and burning of the Forkpiece. The operates with a desktop micro-computer. performin?: the optimization, the user inputs the present grinding dre...

AIMS The purpose of this study was to compare the effect of enamel wetness on microshear bond strength using different adhesive systems. OBJECTIVES To evaluate microshear bond strength of three bonding agents on dry enamel; to evaluate microshear bond strength of three bonding agents on wet enamel; and to compare microshear bond strength of three different bonding agents on dry and wet enamel...