Search results

Poly(ethyleneglycol)-extended UDMA (PEG-U) was found to further improve DVC of UDMA-based matrices, while not adversely affecting PS and PSS [9].
Zr-ACP was chosen as a standard filler based on the extensive evaluation of its stability in different aqueous environments as well as the mechanical strength and ion-release properties of the composites based on this type of ACP and a variety of resin matrices [1, 2, 9].
To achieve handling properties comparable to ACP-composites, 70 mass % glass was blended with the resin.
Discussion Degree of vinyl conversion (DVC) attained in dental resin systems upon polymerization is affected by a number of factors, among which the chemical structure of the monomers and the glass transition temperature (Tg) appear to be of high importance.
It is, however, possible that other factors such as the level of air entrapment and light scattering (affected by profoundly heterogeneous sizes of ACP filler particles) may also reduce the DVC of composites.

These factors are both expressed as the function of backup ratio i.e. the ratio of rim thickness and the tooth height.
Among the correction factors proposed for nominal tooth root stress calculation, the rim thickness factor is separated as it is used for the evaluation of rim thickness influence when detailed calculations of stresses in both tension and compression or experience are not available.
In the case of the adopted gear geometry, loading and material properties, the stress s1max is found approximately 2,2 times greater than sFO for the lowest backup ratio (sR/ht =0,5; sR/m= 1,125) for middle, and about 2,1 times for offset web arrangement.
Li: Journal of Mechanical Design, No.124, (2002), p. 129 [8] C.
Li : Journal of Mechanical Design, Vol. 124, (2002), p. 511

In addition, the pulse frequency (the number of pulses per unit time) also affects the machining speed.
The layer will change the chemical composition, microstructure, mechanical properties of the processing surface, which also leads to a series of the negative impacts on the molding surface of a workpiece.
This would adversely affect the surface quality of the machined surface.
We should consider a couple of factors, such as materials of the workpieces and electrode, processing requirements, to determine the specific electrical parameters.
The Influence Factors of Machining Speed in EDM..

Thetransportofoxidantand fuel through the bipolarplatesis a significant factor affecting the cell performance.
However, graphite is high in cost, has low mechanical strength and the need for machining to form the flow channels [6].
The MEA properties are important because of the prominent effect to the cell performance.
Another factor such as type of MEA, manufacturing and experimental procedure are kept similar in order to have good agreement.
The main distinctive features are the mechanical resolution capabilities of this machine.

The mechanical properties of A6016 are derived from the DYNAFORM material library.
Therefore, the blank holder force (A), the maximum forming depth (B) and the drawbead height (C) are chosen as the three main factors to research in the orthogonal experiment.
In the meanwhile, the orthogonal experiment is carried out based on the three main factors with three levels.
Factors No.
Tekiner, An experimental study on the examination of springback of sheet metals with several thicknesses and properties in bending dies, J.

Properties of welds performed with the use of local cavity method are much better than properties of wet welds and meet requirements of classification societies for depth up to 200 m.
The ferrite content at the weld metal and heat affected zone should be in the range 25-70% to give optimum mechanical properties and corrosion resistance [7-8].
Studies should demonstrate how the water environment and increased cooling rate affects the structure and properties of joints.
Structure of welded deposits: a) sample P3 welded in the air, E=1.7 kJ/mm b) sample W1 welded underwater, E= 0.5 kJ/mm Heat affected zone microstructure could be critical for welded joint properties.
Charles: Super duplex stainless steels: Structure and properties.

Taitung 95045, Taiwan 3 Department of Power Mechanical Engineering, National Taitung College.
The study combines the UV/TiO2 and an ultrasonic procedure to degrade the azo dye wastewater of Acid Yellow 17 and investigates the effects of various factors including the quantities of TiO2 and iron ions added on the efficiency of the removal of the azo dye wastewater of Acid Yellow 17.
The analysis of the catalyst properties indicates that there are no evident changes of the appearance of the crystal and TiO2 catalyst when UV/TiO2 is combined with ultrasonic procedures.
The properties of these dyes usually contain more than one aromatic structure.
Results and Discussion Analysis of the Properties of the Photocatalyst Fig. 2 illustrates the XRD spectrums of the TiO2 photocatalyst.

Therefore, the properties of the component's subsurface are of outstanding importance [3, 4].
These properties are considerably influenced by the applied machining procedure.
Several studies have shown that for aluminium an improvement of material properties can be achieved by mechanical surface hardening.
They comprise at first knowledge about influencing effects of the single processes on the subsurface under variation of process factors.
The decision on suitable process combinations is based on these workpiece properties.

Metal-based biomaterial have reactivity, free electron, surface reactive, corrosion, and mechanical property change [2].
The combination of the high mechanical strength of metals with the osteoconductive properties of bioceramics as coatings on titanium implants is widely used in orthopedic surgery [8].
The implant materials, mechanical load, growth factors and hormone also affect the process of bone formation around an implant in implantation site [12].
Coating properties such as thickness, porosity, hydroxyapatite content, and crystallinity as well as implant roughness can influence the performance of a hydroxyapatite-coated implant [17].
Wagoner Johnson, The mechanical properties and osteoconductivity of hydroxyapatite bone scaffolds with multi-scale porosity, Biomaterials 28 (2007) 45-54.

Primary objective of this work is to predict the temperature profile of heat affected zone in a maraging steel weld.
For further analysis, extensive work needs to be carried out to evaluate the high temperature properties of the maraging steel.
These properties can be incorporated into the simulation model for better prediction of HAZ temperature profiles.
[2] ASM Handbook, Volume 1: Properties and Selection: Irons, Steels, and High-Performance Alloys, 10th Ed. (1990)
Pellisier, An investigation of the mechanical properties and microstructure of 18Ni250 Maraging steel weldments, Trans.