نتایج جستجو برای: internal bonding
تعداد نتایج: 275223 فیلتر نتایج به سال:
Nine AuX molecules (X = H, O, S, Se, Te, F, Cl, Br, I), their isoelectronic HgX analogues, and the corresponding neutral HgX diatomics have been investigated using NESC (Normalized Elimination of the Small Component) and B3LYP theory to determine relativistic effects for bond dissociation energies (BDEs), bond lengths, dipole moments, and charge distributions. Relativistic effects are substanti...
INTRODUCTION ADHESIVE DENTISTRY • Indications for Use of Adhesives • Advantages of Bonding Techniques • Mechanism of Adhesion • Factors Affecting Adhesion ENAMEL BONDING • Steps for Enamel Bonding • Mechanism of Etching DENTIN BONDING • Conditioning of Dentin • Priming of Dentin • Moist vs Dry Dentin DENTIN BONDING AGENT • Mechanism of Bonding • Evolution of Dentin Bonding Agents • Nanofilled B...
In this research NaOH treated date palm fibres were used as reinforcement in phenolic based composites. The composites prepared by hot press technique and evaluated tensile flexural, structural, thermo gravimetric dynamic mechanical properties. Overall properties of modification/treatment fibers’ surface enhanced, that have been studied compared to untreated samples. samples 50% DPF showed high...
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...
The new generation internal beam dump of the Super Proton Synchrotron (SPS) at CERN will have to dissipate approximately 270 kW thermal power, deposited by primary proton beam. For this purpose, it is essential that cooling system features a very efficient heat evacuation. Diffusion bonding assisted Hot Isostatic Pressing (HIP) was identified as promising method joining circuits and materials d...
Process optimization of BCB polymer to silicon oxide bonding was investigated. The suitable bonding temperature is about 300 C, while bond failure of BCB-to-oxide bonding is observed starting from 400 C. Bonding interface morphologies and bond strengths of BCB-to-oxide bonding were investigated as well. PECVD oxide to BCB bonding has better bonding quality than that of thermal oxide to BCB bond...
By MEMS packaging test platform for bonding process of bonding temperature and bonding time, and test silicon specifications experimental study. Experimental results indicate that when the bonding voltage of 1200V, bonding temperature of 445 0 C to 455 0 C, bonding time is 60s, the void fraction is less than 5%. Glass and silicon wafer bonding quality can achieve the best. The experimental resu...
Bonding agents are one of the most important components of solid propellants that enhance the interaction between solid particles and binders. Many bonding agents have been reported so far and sufficient laboratory studies have been carried out on their mechanism of action, including, hydantoin, isocyanorathe, vinyl ether, base-shif, etc. Borate esters are other group of bonding agents that mos...
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