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Online since: May 2005
Authors: Gerhard Pensl, Kurt Semmelroth, T. Acartürk, Ulrich Starke, Stephen E. Saddow
N concentration (*1019cm-3 ) Depth (nm) simulated N concentration Profiling time (s) Intensity (arb. units) CNCs2 profile Figure 1: Simulated N concentration in the ion implanted reference sample (left and lower axis) and corresponding experimental depth profile of the CNCs2 (291.811 amu) peak (right and upper axis, sputter time given). 291.5 291.6 291.7 291.8 291.9 292.0 292.1 0 5 10 15 Intensity (arb. units) Mass (amu) measured intensity CNCs2 position Figure 2: Mass spectrum in the range of the CNCs2 peak for an epitaxial SiC layer with low N doping (raw data).
However, it can be clearly seen that the accuracy at such low concentrations is limited and requires further fine-tuning of the data acquisition parameters or post-measurement fitting procedures.
Nevertheless, the critical step is a reduction of the Ga scan area to prevent re-adsorption of hydrogen from the residual gas.
Using these conditions cP was measured for bulk grown SiC (by the modified Lely method) with intentional P doping on a dual-seed sample with simultaneous growth on the Si- and the Figure 3: Experimental depth profile of the P reference sample for masses P, CP and C2P (sputter time given) 0 500 1000 1500 2000 2500 3000 101 102 103 104 Intensity (arb. units) Profiling time (s) 30.9754 (P + SiH) 42.9730(CP) 54.9736(PC2) Figure 4: Mass spectra in the range of the P peak with (b,d,f) and without (a,c,e) suppression of residual H readsorption by scan range reduction.
A further reduction of these values might be achievable by applying a curve fitting procedure or a peak line shape analysis.
Online since: February 2012
Authors: Jin Ping Chen
You can see from the data in the table, insulation resistance, compressive strength and bond strength along with dry bulk density and increased with the increasing, fold compression ratio will decrease with the increase of dry bulk density.
Polystyrene particle aging, poor weather, with the useful life of growth, flexibility and strength reduction, volume stability will be affected, Cause a reduction in strength of the mortar, cracking resistance of difference. 2) Thermal performance Floats the bead heat preservation mortar thermal conductivity to be low, the heat insulation heat preservation performance is good, this is decides by its special structure.
Table 3 Different dry meter drift-bead insulation mortar of thermal performance Dry unit weight /(kg/m3) 300 500 700 Thermal conductivity /(W/(m.K) 0.092 0.116 0.138 From the above data shows that thermal conductivity of thermal insulation mortar dry density and increased with the increase of, its thermal insulation is reduced accordingly, that is, less dry bulk density thermal insulation the better thermal insulation mortar specimen.
In order to guarantee that the mortar with bonding strength and sagging, also joined the methyl cellulose MC to adjust the consistency of mortar, reinforced bond strength, played water-retention effect, keep the water absorbed by the walls too quickly, effect of cement hydration and cause a reduction in strength. 4) Flame retardant Preservation mortar floating beads used materials are all inorganic compounds, flame and fire good, high temperature shrinkage deformation of volume when not, nor produce toxic gases and polystyrene particles under high temperature shrinkage deformation of volume not only serious and also release a lot on harmful gases.
Online since: November 2013
Authors: Qi Chao, Hossein Beladi, Ilchat Sabirov, Peter Hodgson
The occurrence of DRX can result in not only the refinement of grain size but also the reduction in flow stress.
EBSD maps were acquired using step sizes of 0.5 or 1.0 μm and the HKL Channel 5 software was used to perform data acquisition and post-processing.
Afterwards, the work-hardening rate (θ=dσ/dε) was calculated based on the fitting curve, which agreed well with the experimental σ-ɛ data (Fig. 2).
Beyond that, no obvious grain size reduction was realized up to a strain of 1.0.
The initial increase in the aspect ratio corresponds to the reduction of pre-existing equiaxed grains perpendicular to the compression direction by deformation.
Online since: October 2014
Authors: Aurelian Albut, Adrian Judele, Valentin Zichil
Introduction The cars makers are constantly searching for innovative methods that will lead to reduction of the car body weight simultaneous with reduction of the productions cost.
A very promising opportunity, to satisfy all the requirements (production costs and reduction weight) is to use semis made from bimetallic sheets, known initially as Tailor Welded Blanks (TWBs).
The data obtained during simulations was loaded in postprocessor software for measurements.
The remaining 0.171% is attributable to deviations from the model. which may be due to other factors. to measurement error. or to a failure of the current model to fit the data adequately.
Online since: August 2016
Authors: F.R. Cúnico, T.J.B. Schmitt, R.L.P. Carnin, M.A.B. Bruno, Marilena Valadares Folgueras
The values of weight loss resulting from calcification are shown in Table 1, which also shows the data of chemical analysis in the form of percentage by oxide mass.
Furthermore the tables show data from different particle size distribution, considering that the largest differential is the fraction of fine particulate.
Moreover, the reduction will not be effective if an improvement in compression efficiency occurs.
The decrease of the relative density with an increase in compaction pressure confirms the relationship between the reduction of density with the generation of volatiles.
For the sintered material at 1000°C the effect of the use of the residue in the reduction of porosity can be highlighted, which is associated, at first, with the best compacting effect resulting from change in the particle size distribution of the mixtures, caused by the introduction of the waste.
Online since: August 2015
Authors: M.A. Abdul Aziz, S.M. Shokri, Nofri Yenita Dahlan
Four investment scenarios have been considered i.e. 1) 5% annual increment in capacity rate financial (CRF) and fixed operating rate (FOR), 2) 5% annual reduction in CRF and FOR, 3) escalation in fuel price and 4) 2.5% annual escalation in FOR and variable operating rate (VOR).
Test Data The technical and cost parameters of the Prai Power Plant are shown in Table 1.
In this case, there is no annual escalation or reduction is considered in the uncertainty parameters.
The reduction in CRF and FOR by 5% each year would reduce the levelised tariff to 32.8sen/kWh.
We would also like to acknowledge Mr Mohd Rizal bin Ramli, Head of Capacity Planning from Energy Commission (EC) Malaysia and Mr Moha Zaini Jamil, Senior Engineer (Mechanical) from Tenaga Nasional Berhad (TNB) who provides us with valuable data and system information for the studies.
Online since: October 2020
Authors: Azamat L. Slonov, Ismel V. Musov, Azamat A. Khashirov
There is little data available in the literature describing the effect of FDM-printing technology on the properties of the resulting products and they relate to a relatively narrow range of polymeric materials, namely polylactide (PLA), acrylonitrile butadiene styrene (ABS) and polyetherimide (PEI) with the commercial name ULTEM 9085.
The rheological data of the polyphenylene sulfone matrix and the composite based on it were obtained using an LCR 7000 capillary rheometer of DYNISCO (USA).
And the composite material with more viscosity than pure PPSF can’t provide enough adhesion in the small contact spot which leads to the properties reduction.
The weight of bars and “dogbones” printed with sparse filling in comparison with the + 45/-45 ° mode Size of grid, mm Bar weight, g “Dogbone” weight, g Sparse mode 1 (rhombus) 3.35 1.97 2 (rhombus) 3.03 1.86 3 (rhombus) 2.85 1.80 4 (rhombus) 2.75 1.77 3 (hexagonal) 2.91 1.82 4 (hexagonal) 2.78 1.75 +45/-45 mode - 3.60 2.00 The results of the study demonstrate a weight reduction from 8 to 23 % in the case of bars and from 1.5 to 12.5 % in the case of “dogbones”, which suggests that the percentage of weight reduction depends on the geometry of the printed product.
Online since: April 2023
Authors: Hamed Alwan Gatea
In this work, we study the effect of sintering temperature on the crystal size of CeO2 nanoparticles, which turn in the structural and electrical properties. 1.2 Theoretical part Using XRD data and the Debye-Scherrer equation (Eq. 1), the grain size of CeO2 samples was determined
The pattern of CeO2 agrees with the JCPDS data 34-0394.
ºC " Crystallite size nm" a (Å) c (Å) " Unit Volume (Å)" Density (g/cm3), “800” 22.12 4.795 3.22 74.04 6.867 “900” 27.34 4.709 3.24 71.84 6.9467 “1100" 42.02 4.743 3.19 71.62 7.178 Scherer's formula used to calculate crystallite size from XRD data is given as in equation (1).
Acknowledgements I wish to acknowledge thankful to Al-Mustaqbal University College in Iraq and all staff who help me to achieve my work Availability of data materials Data will not be shared because these data are useful for studying the effect of sintering temperature on dielectric properties of CeO2 nanoparticles Conflict of Interest The authors declare no competing financial interest References [1] P.
Dvořák et al., “Adjusting morphology and surface reduction of CeO2(111) thin films on Cu(111),” J.
Online since: October 2024
Authors: Sholihun Sholihun, Widayanti Widayanti, Farahdina Zain
The calculation data is fitted using the Birch-Murnaghan equation of states (BM-EOS) on Eq. 1 [19].
Previous research generally does not report on data θ2 bond angle.
Tables 1 and 2 tell us that pure anatase has bond length and angle that are not very different from the reference data  [21].
There is no data for the 16% biaxial strain bond length and bond angle because the bonds between atoms in this variation have been broken.
All data from the band gap energy calculation is summarized in Table 3 and Table 4.
Online since: March 2019
Authors: Young Suk Kim, Jung Han Song, Quoc Tuan Pham, Joong Cheul Park
Several material constitutive models were developed to match with the experimental data.
Additionally, experimentally measured data were plotted in this figure as a comparison.
Fig. 3b shows a comparison between the IH function and the experimental data obtained from the unixial tensile test for the tested material.
Fig. 4b shows a comparison between calculated cyclic stress-strain curves obtained from three hardening model and the experimentally measured data.
Numerical results were compared with the experimental measurement data to verify the influence of material models on springback prediction.
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