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Online since: May 2004
Authors: Alpagut Kara
Since the calcium has the highest atomic number of the elements
present in the body, the brighter areas are likely to represent β-TCP.
Fig. 2 (b) is a typical SE image of a similar area but polished and thermally etched (at 1150°C for one hour) surface where β-TCP crystals with different grain sizes, mainly in the form of clusters, can be seen as embedded in the glassy phase.
Fig. 2 (b) is a typical SE image of a similar area but polished and thermally etched (at 1150°C for one hour) surface where β-TCP crystals with different grain sizes, mainly in the form of clusters, can be seen as embedded in the glassy phase.
Online since: March 2016
Authors: Feng Lin Zhang, Yu Mei Zhou, Peng Cheng Li, Shang Hua Wu, Kun Bai
Boron can not be detected because of its lower atomic number.
The fracture surface is smooth and separated from the gaps between the crystal grains, which show the intergranular fracture mode.
The fracture surface is smooth and separated from the gaps between the crystal grains, which show the intergranular fracture mode.
Online since: March 2016
Authors: Na Na Zhao, Yun Hua Xu, Ke Song, Liu Liu Shen, Vladimir E. Ovcharenko
When the carbon atoms account for half the number of octahedral interstices, Ta2C will transform from its close-packed hexagonal structure to TaC, with an f.c.c. structure.
The worn surface of layer A shows in Fig.7 (a), it is an uneven surface, on which the concave and convex parts have no obvious direction (noting: blue arrow in the figure for the movement direction of Al2O3 grinding grain), and the grooves in layer A are blocked by the TaC dense ceramic.
The worn surface of layer A shows in Fig.7 (a), it is an uneven surface, on which the concave and convex parts have no obvious direction (noting: blue arrow in the figure for the movement direction of Al2O3 grinding grain), and the grooves in layer A are blocked by the TaC dense ceramic.
Online since: June 2004
Authors: Sandrine Juillaguet, Jean Camassel, Roland Madar, Marcin Zielinski, Carole Balloud, Didier Chaussende, Francis Baillet, Etienne Pernot, Michel Mermoux, Michel Pons, Laurent Auvray
Introduction
The increasing maturity of SiC technology has been demonstrated by the growing number of
companies offering SiC substrates, with or without epitaxy on top.
The growth mode was stable on the whole sample surface except, in some cases, at the center of wafer were a few polycrystalline grains formed during the last hour of the run.
The growth mode was stable on the whole sample surface except, in some cases, at the center of wafer were a few polycrystalline grains formed during the last hour of the run.
Online since: March 2007
Authors: Hiroshi Harada, Hisao Fujikawa, Takao Murakumo, Simon Newcomb
Searching for a superalloy with the requisite microstructures, a number of Ni-based superalloys
were designed using various models, including the mathematical model established on the database
in NIMSJ (National Institute for Materials Science Japan), the thermodynamic model and others [13].
Also, much larger amounts of Al, W, Re, Ta and so on were also detected at the oxide-metal interface than in the inside of the oxide grains.
Also, much larger amounts of Al, W, Re, Ta and so on were also detected at the oxide-metal interface than in the inside of the oxide grains.
Online since: January 2010
Authors: T. Lohner, Attila Lajos Tóth, I.P. Lisovskyy, S.O. Zlobin, A. Szekeres, E. Vlaikova, P.E. Shepeliavyi
The dielectric functions of the
components (either amorphous, crystalline [2,3] or fine-grain polycrystalline [4] silicon, amorphous
SiO and SiO2 [2] and voids) were taken from the literature.
In the case of annealed film, the number of extrema decreased, which together of their shift pointed out that annealing weakly affected the film non-homogeneity but reduced the film thickness.
In the case of annealed film, the number of extrema decreased, which together of their shift pointed out that annealing weakly affected the film non-homogeneity but reduced the film thickness.
Online since: January 2007
Authors: Ji Wang Yan, Tsunemoto Kuriyagawa, Nobuhito Yoshihara, Hiroshi Matsuura, Kazuhiro Hane, Yasuhiro Kunieda
For a small diameter wheel, where only a
small number of grains are present in the wheel, the dressing interval is short, and it is difficult to
obtain the required surface state.
Online since: May 2011
Authors: Yan Ling Lu, Yan Kun Chen, Shi Guo Du, Qing Hong, Yi Guo
Phytic acid(C6H18O24P6), as a natural and innocuous organic phosphorous compound extracted from grain crops, is a rarely seen metal polydentate chelator.
Therefore, chelation occurs to Mg2+ and Al3+ that obtained through dissolution of base alloy anode, and phytic acid, so the chelator is the main component of the phytic acid conversion coating; Content of P (percentage by weight) decreases with larger pH value, and its content is 11.21% when pH value is 2.5, this number drops to 3.18% when pH value is 8; reversely, content of Mg (percentage by weight) increases with pH value, Mg content is 20.07% when pH value is 2.5 and then it soars up to 46.14% when pH value is 8.
Therefore, chelation occurs to Mg2+ and Al3+ that obtained through dissolution of base alloy anode, and phytic acid, so the chelator is the main component of the phytic acid conversion coating; Content of P (percentage by weight) decreases with larger pH value, and its content is 11.21% when pH value is 2.5, this number drops to 3.18% when pH value is 8; reversely, content of Mg (percentage by weight) increases with pH value, Mg content is 20.07% when pH value is 2.5 and then it soars up to 46.14% when pH value is 8.
Online since: June 2010
Authors: Małgorzata Witkowska, Janusz Ryś
In general, deformation mechanisms operating
within the bands of ferrite and austenite depend on a number of factors like chemical composition,
stacking fault energy and initial orientation distribution.
Usually one set of deformation twins was observed within the single and elongated grains of austenite (Figs. 4-6).
Usually one set of deformation twins was observed within the single and elongated grains of austenite (Figs. 4-6).
Online since: April 2012
Authors: Jolanta Janczak-Rusch, Marek Danielewski, M. Pawełkiewicz, Bartek Wierzba
For validation purpose (to reduce the number of components in the system) as a model experiment we use as filler pure Sn.
The Cu6Sn5|Sn interfaces obtained by the reflow technique and after 3h annealing time show a nonuniform thickness (escallop-like grains).
The Cu6Sn5|Sn interfaces obtained by the reflow technique and after 3h annealing time show a nonuniform thickness (escallop-like grains).