Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: February 2011
Authors: Hung Jiun Wen, Fuh Liang Wen, Kuo Hwa Chang, C.H. Wen, Yu Lin Lo
Their advantage properties including anti-wearing, low resistivity, low diffusion coefficient and dielectric constant, are very suitable as the layer for diffusion barriers of Cu metallization to obstruct the chemical reaction between semiconductor materials and metals [9-14].
To find the influenced factors for a ZrNx film deposition, we performed DOE method to determine their correlation among factors.
Using the categorized technique for environmental factors and controlled factors, the interactive relationship among these factors could be testified for the better operating parameters.
There are eight factors to be selected in this experiment.
Deeply tracking the another factor affected on the depositing rate, the vacuum pressure has directly affected on the coating efficiency.
Online since: November 2014
Authors: Jun Zhao Gao, Chao Zhao
Introduction of experiment Raw material:Cement: P. Ⅱ52.5 Portland Cement made in a cement plant in Nanjing, its basic physical and mechanical properties and chemical composition are shown in table 1 and 2, the content (mass fraction) of C3S, C2S, C4A and C4AF in its clinker is 55.5%, 19.1%, 6.6% and 10.2% respectively.
Table 1: Physical and mechanical properties of Portland cement Fineness Specific surface (m2/kg-1) Setting time(min) Compressive strength(MPa) Split strength(MPa) Normal consistency Water requirement (% Slot plate screens Initial setting Final setting 3d 28d 3d 28d 26 0.3 341 103 159 35.4 65.2 6.4 9.2 Table 2: Chemical content of main gelled materials (%) Gelled material SiO2 Al2O3 CaO MgO SO2 Fe2O3 Na2O K2O Ignition loss Cement 20.60 5.03 65.06 0.56 2.24 4.39 1.31 Silica fume 93.20 0.51 0.51 0.23 5.56 Fly ash 52.38 32.12 2.16 0.47 .033 4.12 0.26 0.60 1.31 Slag 33.49 12.20 36.34 1060 0.67 1.30 .034 2.17 1.27 Sand: Yellow sand made in Nanjing, its apparent density is 2500kg/m3, bulk density l615kg/m3, slit content 1.0% and fineness modulus 2.72 and it belongs to Ⅱmedium sand.
Engineering Properties of Poly Carboxylic Concrete Air-entraining Agent [J].
The Study of Factors Affecting Air Content of Concrete [J].
SJ-2 New Air-entraining Agent and Its Air-entraining Concrete Properties [J].
Online since: August 2018
Authors: Ai Xia Chen, Jie Guang Song, Mei Hua Chen, Jin Shi Li, Chao Yang, Ge Xiong, Hui Min Sun, Xue Yang, Lin Chen
Thus, these factors are restricted in the experimental parameters and operating conditions, because subtle changes in the parameter setting will greatly affect the adsorption of the crystal face [7-8].
The product possessed several good properties, such as fine particle size distribution and decentralized and controllable morphology.
The powder properties and preparation technology were highly relevant during the preparation of the ultrafine powder.
Jiang, Effects of B-site Co2O3 doping on microstructure and electrical properties of Na0.25K0.25Bi2.5Nb2O9 ceramics, J.
Sun, Investigation of thermodynamic properties of Co2O3 powder, Thermochim.
Online since: October 2011
Authors: M. Khadem, M. M. Kheirikhah
Solution for bending analysis of sandwich plates under various transverse loads are presented and the effect of many parameters such as plate dimensions, loading conditions, material properties of core, skins and SMA wires are studied.
Introduction Monotypic properties about laminated composites and sandwich structures such as high strength-to-weight ratio, heat insulation, good ability in sound and energy absorbing, easy installation and low production cost have been caused that they widely are being used in various engineering applications such as aerospace, automotive, naval and other industries.
Lu et al. [2] presented a theoretical model for bending of the laminated SMA embedded beams and provided the relationship between bending moment and other factors such as curvature and temperature.
The effect of various parameters such as plate dimensions, loading conditions, material properties for core and skins was investigated on the bending behavior of sandwich plates.
It could be seen that some parameters such as sandwich plate dimensions and boundary conditions are important factors affecting on the bending behavior of the square sandwich plate, normal stresses and transverse shear stress components.
Online since: February 2008
Authors: Hamid Reza Rezaie, Golsa Naderi, Ali Shokuhfar, Rahim Naghizadeh
Effect of Colloidal Silica and Nano Boehmite Mixture on Reaction Sintering, Microstructure and Physical Properties of Tialite G.
The results show that the presence of nano size silica and boehmite enhanced the densification leads to fine microstructure, mullite phase formation and improve the tialite ceramics properties.
The physical and mechanical properties of tialite are strongly determined by the microstructure.
Mullite as a second phase was used to improve the creep resistance and high temperature mechanical properties [11, 12].
Two important factors are affected on bulk density: 1-temperature, 2combination, density increases with growing temperature because of more condensation and sintering improvement.
Online since: September 2011
Authors: Hui Guan, Ling Sun, Qi Ge
Different concentrations of stabilizer addition on the properties of asphalt It can be seen from Figure 4, the addition of stabilizers have greatly improved on the softening point, while a certain decrease of the ductility, and the degree of penetration has little effect.
Figure 3 Penetration with different content of carbon nanotube/SBS modified asphalt Figure 4 Different concentrations of stabilizer addition on the properties of asphalt E.
Optimizing various factors, the best system is established by a carbon nanotube, SBS and stabilizer, the performance of base asphalt or SBS modified bitumen product is greatly improved.
SBS modified asphalt production technology and properties research, (1991)
Dynamic mechanical analysis on shearing and developing procedure of styrene-butadiene-styrene modified asphalt (2005)
Online since: August 2015
Authors: Daniel Hattingh, Stephen Grewar, Ina Yadroitsava, Igor Yadroitsev
Due to the nature of SLM manufacturing, as-built parts have some peculiarities: anisotropy of mechanical and structural properties, high surface roughness, and complications powder evacuation from small size channels.
Factors causing residual stresses in parts manufactured through SLM are the deformation in various sections of an object due to different thermal gradients and temperature-dependent properties of material; volumetric changes arising during heating and solidification or due to phase transformation, or from differences in the material properties of the multi-material SLM objects.
Wauthle, Assessing and comparing influencing factors of residual stresses in selective laser melting using a novel analysis method, in: Proc.
Loureiro, Properties and applications of titanium alloys: a brief review.
Stucker, Microstructures and mechanical properties of Ti6Al4V parts fabricated by Selective Laser Melting and Electron Beam Melting, JMEP 22/12 (2013) 3873-3883
Online since: May 2011
Authors: Bi Wu Huang, Shi Min Liu, Wei Qing Chen
With the photosensitive resin as the processing material, cuboid parts and double-cantilever parts were fabricated by using a stereolithography apparatus, and the dimension shrinkage factor and the curl factor were studied.
The shrinkage factor was less than 1.00%, and the curl factor was less than 8.00%, which showed that the accuracy of the fabricated parts was high with the photosensitive resin for stereolithography.
Although SL has evolved so fast and received more and more attention in the past few years, and some critical research problems affect SL’s survival, maturation and further application.
SLA part accuracy is a direct result of the resin properties, and a low shrinkage resin that is cured possesses a high accuracy for its fabricated part.
It has now been found that the photosensitive resins of epoxy-acrylate hybrid systems can be used for stereolithography, and the photosensitive resins are distinguished by a very low viscosity, a very low shrinkage, a very low curl factor and good mechanical properties in the green state and after full curing.
Online since: November 2024
Authors: Nathapong Sukhawipat, Narongrit Sosa, Aunpada Limrueangamphon, Chonthichar Intachai, Kritsada Aopoom, Tinnathon Navanuch, Jantima Upan, Benjatham Sukkaneewat, Yutthana Wongnongwa
The variation in AC content was observed to impact crosslink density and mechanical properties, with an increase in crosslink density compared to neat NRLF.
NR is renowned for its exceptional flexibility and impressive mechanical properties, making it an ideal candidate to enhance both the practicality and performance of the composite material [13].
This innovative approach encompasses an in-depth exploration of the intricate interplay between various factors, including crosslink density, mechanical properties, morphology, and Pb2+ adsorption efficiency.
Agglomeration might occur in clustered regions within the foam, affecting the uniformity of structure.
The composite demonstrated enhanced porosity, well-dispersed AC networks, and improved mechanical properties, contributing to a maximum Pb2+ adsorption efficiency of 1.28 mg/g at 5 phr of AC.
Online since: August 2009
Authors: Yuan Liang Zhang, Zhi Min Zhou, J. Dong, X.Y. Li
However, stainless steel alloys are difficult-to-machining materials; currently the general tools used to manufacture stainless steel usually fail to meet the requirement, even the tools made by cubic boron nitride or ceramics are unable, due to its own mechanical physical properties far from the requirements.
Therefore any aspect affecting the tool wear will affect the tool life indirectly.
All the factors influencing tool life must be analyzed, so as to determine the relationship effectively among them and obtain a reasonable and optimal tool life as well as good cutting performance.
Given the workpiece, tool material and tool geometry, cutting parameters are the main factors which impact the tool life.
With all these factors considered together, the optimal cutting depth can be obtained by ultrasonic vibration when machining stainless steel alloy.
Showing 10301 to 10310 of 26166 items