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Online since: December 2005
Authors: Andrei A. Istratov, Eicke R. Weber, Tonio Buonassisi, M.A. Marcus, Matthias Heuer, M.D. Pickett, B. Lai, Z. Cai, Steve M. Heald
Additionally, the
elastically scattered peak intensity can be used to map grain structure in multicrystalline samples.
Grain boundary structure from elastically scattered peak.
In addition, the dimensions of a particle smaller than the beam spot size can also be determined: Knowing the depth of an impurity particle (and thus, the attenuation of the exiting X-ray fluorescence), and calibrating the µ-XRF count rate with a standard material with known impurity concentration (typically a NIST SRM 1832 or 1833 foil), it is possible to determine the number of impurity atoms comprising the particle by using the equation: )(cm (atoms/g) )(g/cm [M] (cts/s) (cts/s) =(atoms) 2 Std 2 Std Std Prec Prec A D C C N ⋅ ⋅ ⋅ , [Eq. 3] from Ref. [8], where Nprec is the number of atoms in a precipitate, Cprec is the XRF count rate with the beam focused on the precipitate and adjusted for the depth of the particle, Cstd is the XRF count rate of the standard sample, [M]Std is the known metal concentration within the standard, DStd is the density of the standard material in terms of atoms/g, and A is the X-ray beam spot size.
Oxidation state, degree of covalent or ionic bonding, and coordination number are factors that heavily influence XANES and depend on local bonding.
The operations of the Advanced Light Source at Lawrence Berkeley National Laboratory and of the Advanced Photon Source at Argonne National Laboratory are supported by the Director, Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under Contract Numbers DEAC03-76SF00098 and W-31-109-ENG-38, respectively.
Grain boundary structure from elastically scattered peak.
In addition, the dimensions of a particle smaller than the beam spot size can also be determined: Knowing the depth of an impurity particle (and thus, the attenuation of the exiting X-ray fluorescence), and calibrating the µ-XRF count rate with a standard material with known impurity concentration (typically a NIST SRM 1832 or 1833 foil), it is possible to determine the number of impurity atoms comprising the particle by using the equation: )(cm (atoms/g) )(g/cm [M] (cts/s) (cts/s) =(atoms) 2 Std 2 Std Std Prec Prec A D C C N ⋅ ⋅ ⋅ , [Eq. 3] from Ref. [8], where Nprec is the number of atoms in a precipitate, Cprec is the XRF count rate with the beam focused on the precipitate and adjusted for the depth of the particle, Cstd is the XRF count rate of the standard sample, [M]Std is the known metal concentration within the standard, DStd is the density of the standard material in terms of atoms/g, and A is the X-ray beam spot size.
Oxidation state, degree of covalent or ionic bonding, and coordination number are factors that heavily influence XANES and depend on local bonding.
The operations of the Advanced Light Source at Lawrence Berkeley National Laboratory and of the Advanced Photon Source at Argonne National Laboratory are supported by the Director, Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under Contract Numbers DEAC03-76SF00098 and W-31-109-ENG-38, respectively.
Online since: January 2014
Authors: Hang Guo, Jie Lin, Chang Liu, Qi Liu
SEM picture (Fig.3) shows that with the increasing of doped Cu, the SnOx particles on the surface of thin films become smaller, and the contact areas between SnOx grain and lithium ion become bigger.
Fig. 4 Discharge capacity curves of SnOx vs. cycle number.
Fig.7 Discharge capacity curves of all-solid-states thin film lithium-ion micro-batteries vs. cycle number 3.
Fig. 4 Discharge capacity curves of SnOx vs. cycle number.
Fig.7 Discharge capacity curves of all-solid-states thin film lithium-ion micro-batteries vs. cycle number 3.
Online since: July 2008
Authors: Naoaki Noda, Biao Zhang, Kazuhiko Yonemaru, Shota Higo, Yoshihiro Takamatu
The total number of elements is 60450, and total number of nodes is 77868.
Fig.6 Method of analysis Fig.7 Three kinds of models analyzed Fig.4 Example of FEM mesh for 3D model Fig.5 Boundary conditions of the model *ABCE*BCAE * CABE References [1] Abb research ltd., "Method of forming motor", Japan patent (in Japanese), 2004-505595 [2] Kumai, S., and Yaskawa electric corp., "Winding accumulating core of motor", Japan patent (in Japanese), s51-40506 [3] Kikuchi, Y., Fukuda, Y., Maeyama, K., and Fujitsu general ltd., "Motor", Japan patent, 2005-160170 [4] Sakanishi, S., Asai, T., Koyama, M., and Kuroda precision ind. ltd., Mitsuba electric mfg. co. ltd., "Method and device for manufacturing winding stator core", Japan patent, h2-106151 [5] Mizutani, K., and Toshiba corp., "Manufacture of annular core", Japan patent, h1-264548 [6] Kaido, C., "Spiral Core made of Grain-oriented Electrical Steel Sheet", IEEJ Transactions on Industry Applications, Vol. 116, No. 3 (1996), pp. 265-270 0 1 1.04 1.08 1.12 1.16
Fig.6 Method of analysis Fig.7 Three kinds of models analyzed Fig.4 Example of FEM mesh for 3D model Fig.5 Boundary conditions of the model *ABCE*BCAE * CABE References [1] Abb research ltd., "Method of forming motor", Japan patent (in Japanese), 2004-505595 [2] Kumai, S., and Yaskawa electric corp., "Winding accumulating core of motor", Japan patent (in Japanese), s51-40506 [3] Kikuchi, Y., Fukuda, Y., Maeyama, K., and Fujitsu general ltd., "Motor", Japan patent, 2005-160170 [4] Sakanishi, S., Asai, T., Koyama, M., and Kuroda precision ind. ltd., Mitsuba electric mfg. co. ltd., "Method and device for manufacturing winding stator core", Japan patent, h2-106151 [5] Mizutani, K., and Toshiba corp., "Manufacture of annular core", Japan patent, h1-264548 [6] Kaido, C., "Spiral Core made of Grain-oriented Electrical Steel Sheet", IEEJ Transactions on Industry Applications, Vol. 116, No. 3 (1996), pp. 265-270 0 1 1.04 1.08 1.12 1.16
Online since: March 2006
Authors: Koichi Niihara, Hisayuki Suematsu, Tsuneo Suzuki, Wei Hua Jiang, X.P. Zhu
No or less nitrides were produced under irradiation of
very high intensity or less number of shots.
The approach can overcome some problems that occur in the conventional chemical treatments or coating techniques, such as unavoidable heating of the entire workpieces (high energy consumption and possibility of bulk deterioration, e.g., grain coarsening by the heating) and weak film-substrate bonding strength.
Shot number, N, was changed from 1 to 10 for the irradiation, respectively.
N = 1 N = 2 N = 5 N = 10 ○ D2 D2 B2 observed with increased shot number [Fig. 3(b)-(d)].
Secondly, shot number has a crucial influence on formation kinetics of the nitrides and carbontrides.
The approach can overcome some problems that occur in the conventional chemical treatments or coating techniques, such as unavoidable heating of the entire workpieces (high energy consumption and possibility of bulk deterioration, e.g., grain coarsening by the heating) and weak film-substrate bonding strength.
Shot number, N, was changed from 1 to 10 for the irradiation, respectively.
N = 1 N = 2 N = 5 N = 10 ○ D2 D2 B2 observed with increased shot number [Fig. 3(b)-(d)].
Secondly, shot number has a crucial influence on formation kinetics of the nitrides and carbontrides.
Online since: March 2015
Authors: Jie Qiong Hu, Song Wang, Ming Xie, You Cai Yang, Ji Ming Zhang, Yong Chen, Yong Tai Chen, Sai Bei Wang, Song Chen
The influence of solidification rate to microstructures, morphology and grain size of Pt-Ir-M alloys were analyzed.
Mechanical and electrical properties of Pt-Ir-M(M=Zr, Mo, Y)system According to phase diagram of Pt-Ir-M system and its applications[4-6], we designed the chemical composition of Pt-Ir-M (M=Zr, Mo, Y) system as follow: Pt-10Ir-1Zr, Pt-10Ir-1Mo, Pt-10Ir-1Y; Pt-25Ir-1Zr, Pt-25Ir-1Mo, Pt-25Ir-1Y, where the number represent the mass percentage of each composition element.
It also can be found in the tables that with the same percentage of doping elements Mo, Y, Zr in Pt-Ir solid solution, the electronic transfer number of Y element is the largest, followed by the Zr element, and the electron transfer number of Mo element is the smallest.
Mechanical and electrical properties of Pt-Ir-M(M=Zr, Mo, Y)system According to phase diagram of Pt-Ir-M system and its applications[4-6], we designed the chemical composition of Pt-Ir-M (M=Zr, Mo, Y) system as follow: Pt-10Ir-1Zr, Pt-10Ir-1Mo, Pt-10Ir-1Y; Pt-25Ir-1Zr, Pt-25Ir-1Mo, Pt-25Ir-1Y, where the number represent the mass percentage of each composition element.
It also can be found in the tables that with the same percentage of doping elements Mo, Y, Zr in Pt-Ir solid solution, the electronic transfer number of Y element is the largest, followed by the Zr element, and the electron transfer number of Mo element is the smallest.
Growth Time Effect on the Structural and Sub-Structural Properties of Chemically-Deposited ZnO Films
Online since: July 2015
Authors: Anatoliy S. Opanasyuk, Denys I. Kurbatov, Hyeon Sik Cheong, Andreu Cabot, Taisiia O. Berestok
In particular, we detail here the influence of condensation time on the crystal phase, texture quality, lattice constants, grain size, coherent scattering domain size (CSD), microstrain, stress and concentration of dislocations.
The grain size and microstrain in the direction perpendicular to the crystallographic planes (002) are in the range L ~ 26-42 nm and e ~ (0.59-3.09)×10-3, respectively.
There are a number of reports devoted to the investigation of structural properties of ZnO deposited by different methods [18, 19, 20, 21, 22].
The pole density was calculated using the equation: , where and are the integral intensity of the i- diffraction peak for the film samples and the standards, respectively; and N is the number of lines in the diffraction pattern.
The average dislocation density, which forms the boundaries of the blocks, is [30], where n is the number of dislocations in each of the six faces of the block.
The grain size and microstrain in the direction perpendicular to the crystallographic planes (002) are in the range L ~ 26-42 nm and e ~ (0.59-3.09)×10-3, respectively.
There are a number of reports devoted to the investigation of structural properties of ZnO deposited by different methods [18, 19, 20, 21, 22].
The pole density was calculated using the equation: , where and are the integral intensity of the i- diffraction peak for the film samples and the standards, respectively; and N is the number of lines in the diffraction pattern.
The average dislocation density, which forms the boundaries of the blocks, is [30], where n is the number of dislocations in each of the six faces of the block.
Online since: October 2006
Authors: Claudio Manfredotti
After a long research for building " big " high purity Ge spectrometers, we
have recorded, starting from 30 years ago, strong efforts for materials like CdTe, which only now is
really commercial; 10 years ago, epitaxial GaAs and even more recently SiC came into play for
other kinds of application, since for gamma ray spectroscopy their atomic numbers were too low.
Polycrystalline materials like CVD diamond displayed in the past non-uniform cce maps, in which it was easy to notice the appearance of single grains.
Moreover, the presence of traps in the defective regions around the grain boundaries caused strong polarization effects which in practice impeded in many cases to get reasonable cce maps.
Even after a priming of 10 Gy of X-rays the sample showed polarization effects in times of the order of few minutes: cce distribution was quite non-uniform, displaying the morphology of grains according to their local values of cce and, moreover, energy resolution was extremely bad, since the multichannel pulse spectrum - displayed at bottom right - showed a very broad band.
The number of events above the threshold also decays from 573 to 506, i. e. of about 11 %.
Polycrystalline materials like CVD diamond displayed in the past non-uniform cce maps, in which it was easy to notice the appearance of single grains.
Moreover, the presence of traps in the defective regions around the grain boundaries caused strong polarization effects which in practice impeded in many cases to get reasonable cce maps.
Even after a priming of 10 Gy of X-rays the sample showed polarization effects in times of the order of few minutes: cce distribution was quite non-uniform, displaying the morphology of grains according to their local values of cce and, moreover, energy resolution was extremely bad, since the multichannel pulse spectrum - displayed at bottom right - showed a very broad band.
The number of events above the threshold also decays from 573 to 506, i. e. of about 11 %.
Online since: March 2011
Authors: Dong Hui Wen, Wei Fang Wang, J. Zhang
Although previous studies have created a number of high-precision surface finishing methods and processes, research institutions at home and abroad are still actively exploring a new method of high-quality, high efficiency and low cost to surface processing[4,5].
Radiating surface to do even vibration, the output frequencyis , circular frequency , ignore the impact of particle and bubble, sound velocity in the slurrycan be considered equal with speed of sound in water is .Output of ultrasonic wave number , wavelength .
(a) Single sound source (b) Multiple sound source Fig.3 Flow field of the slurry It can be seen from the Fig.3 by contrast, when a single sound source to vibrate, the flow distribution of grain is much uniform in the container.
Radiating surface to do even vibration, the output frequencyis , circular frequency , ignore the impact of particle and bubble, sound velocity in the slurrycan be considered equal with speed of sound in water is .Output of ultrasonic wave number , wavelength .
(a) Single sound source (b) Multiple sound source Fig.3 Flow field of the slurry It can be seen from the Fig.3 by contrast, when a single sound source to vibrate, the flow distribution of grain is much uniform in the container.
Online since: July 2011
Authors: Bo Huang, Zeng Wen Liu
Table 1 Cutter parameters
Parameters
Value
Diamond grain size [#]
Concentration [Kts/cm]
Cutter weight [g]
Cutter diameter [mm]
Tooth number
Tooth width [mm]
Cylindrical diameter [mm]
Maximum diameter [mm]
45/50
120
612
59
16
6
51
96
The material for experiment is a kind of granite from Jinan, China.
(2) Where, v is the peripheral speed of cutter, is the number of tooth, is the feed rate in each tooth, d is the diameter of cutter.
(2) Where, v is the peripheral speed of cutter, is the number of tooth, is the feed rate in each tooth, d is the diameter of cutter.
Online since: December 2014
Authors: Wei Gao, Shi Liang Zhang
Many studies [3-11] on melting argue that homogeneous and heterogeneous nucleation of melt will be formed at surface, interface, grain boundaries, defect and dislocation etc.
The MD program XMD [14] was performed under the constant number, pressure and temperature ensemble (NPT).
Fig.3a shows the time when the system has no the Lindemann particles, and Fig.3b shows the scenario where the number of Lindemann particles is less than 1.9%.
The MD program XMD [14] was performed under the constant number, pressure and temperature ensemble (NPT).
Fig.3a shows the time when the system has no the Lindemann particles, and Fig.3b shows the scenario where the number of Lindemann particles is less than 1.9%.