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Online since: November 2007
Authors: A.W. Musumeci, G.G. Silva, J.W. Liu, L. Rintoul, G.A. George, E.R. Waclawik
For example, the ratio of crystalline-to-amorphous rrP3HT in solution processed films can dramatically influence charge carrier transport in oFET devices both through polymer intrachain conformation effects and through changes in crystalline grain sizes and the limits imposed by these structural domain boundaries per unit length[3, 4].
Figure 1b shows the MWNT structure and the analysis of 15 tubes led to the determination of distribution of number of graphene walls in this sample: 8 ±3 nm.
Online since: May 2011
Authors: Gang Xu, Jing Zhao, Li Hua Zhao
Aggregate density of gross volume (g/cm3) Grain size /mm 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Mineral powder Apparent relative density /g·cm-3 2.808 2.806 2.795 2.772 2.702 2.703 2.703 2.695 2.732 2.693 2.725 1.2 Design of mix proportion According to the related provisions in Criterion[5], the mix proportion of SMA mixture is designed like following: the admixture ratio of lignin fiber is 0.3%, while mineral fiber and mineral wool fiber are all 0.4%.
Section photos of SMA-16 If the mixture distribution is uniform, then each file size of aggregate whose location distribution and distributed number in each area section should be uniform too[11].
Online since: October 2010
Authors: Bing Wang, Li Dan Tang, Jian Zhong Wang
Tab.2 the grain sizes of ZnO powders Sample 2θ/° B/° d/nm A 36.196 0.254 74.8 B 36.218 0.300 62.7 C 36.213 0.334 56.4 D 36.194 0.352 54.5 We can see that particle sizes decrease as the radios of urea to glycine decline.
(4) (5) Where n is the number of the mole, T is the adiabatic flame temperature, and Cp is the heat capacity of the products at constant pressure.
Online since: February 2011
Authors: Zuhailawati Hussain, Emee Marina Salleh
MA process greatly depends on a number of process parameters to achieve the desired product phase, microstructure and properties.
As reported by Tjong and Ma [7], the contact area between the grains increased and particles underwent extensive plastic deformation when the pressure increased.
Online since: April 2007
Authors: Kunihito Koumoto, Shingo Ohta, Hiromichi Ohta
We estimated thermal conductivity (κtotal) at 1000 K according to the Wiedemann-Franz's law (κelectron = LσT, L: Lorentz number).
It should be noted that the ZT value of the ceramic sample reaches 0.35 at 1000 K, which may indicate that carrier scattering at grain boundaries of the ceramic is not remarcable at high temperatures.
Online since: December 2011
Authors: Shu Ping Gong, Dong Xiang Zhou, Fei Shi, Qiu Yun Fu
Introduction Multiferroic materials with coexistence of at least two ferroic orders (ferroelectric, ferromagnetic, or ferroelastic) have recently stimulated a sharply increasing number of research activities for their scientific interest and significant technological promise in the novel multifunctional devices [1-3].
It was clear that dense, homogeneous, and fine-grained powders, with average particle size of 50 nm, were prepared at 800 ºC.
Online since: February 2015
Authors: Uman Hassan, Zainal Arifin Ahmad, Mohamad Zaky Noh
The main phase composition of a porcelain body is constituted by a heterogeneous glassy matrix and needle-shaped mullite crystals together with some quartz grains and closed irregular-shaped pores.
Table 1: Compositions with substitution of quartz by POFA (wt %) Mix Number Clay Feldspar Quartz POFA AP1 50 25 25 0 AP2 50 25 20 5 AP3 50 25 15 10 AP4 50 25 10 15 AP5 50 25 5 20 AP6 50 25 0 25 Results and Discussion X-Ray Fluorescence (XRF) analysis is proficient in analyzing material contents inside POFA, hence the amount of SiO2 can be observed.
Online since: December 2013
Authors: Stefano Spigarelli, Mohamad El Mehtedi, Samer El Mohtadi
The torque M and the number of revolutions N were recorded and converted to von Mises equivalent stress s and equivalent strain e at the surface: and (5) where R and L are respectively the radius and the length of the gauge, is determined at constant strain, and at constant strain rate.
Grain evolution analysis and experimental validation in the extrusion of 6XXX alloys by use of a lagrangian FE code, Int.
Online since: June 2013
Authors: Wiktoria Ratuszek, Joanna Kowalska, Małgorzata Witkowska, Anna Zielińska-Lipiec
In the course of deformation, and simultaneously, a number of processes occur, namely: the deformation of austenite, the phase transformation induced deformation g®e and e®a’, and also the deformation of austenite and martensite both by slip and by twinning alike.
In turn, the lowering of the intensity of them in case of the higher degrees of deformation may be explained by the formation of the e martensite from the grains of those orientations, because they are privileged, and it is in them that the g®e transformation occurs first.
Online since: July 2019
Authors: Qing Meng Zeng, Zheng Feng Wu, Bao Tong Chai
Researches on material properties were mainly focused on impurity elements (such as P, S, Mn elements), yield strength and grain boundary carbide [1].
At the same time, a large number of intergranular fracture morphology (Fig. 6) was found, indicating that the rotor material was brittle.
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