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Online since: January 2004
Authors: Radosław Zaleski, Anna Borowka
The number of cracks rises (relative I4 growth of a few percent is similar for all samples), and then the fragments of the template leave the silica pore structure.
The grain sizes of the investigated materials are small (below 0.1 µm) comparing to the path of o-Ps migration which is of 1 µm or more.
Online since: May 2014
Authors: Ernst Kozeschnik, Isabella Maria Zylla, Niko Grosse-Heilmann, Andreas Peters
Such Dimensions of up to 10 µm are quite reasonable, e.g. assuming prior austenite grain sizes of up to 50 µm and considering martensite fractions of 0.8.
The number of nucleation sites increases drastically due to the prior martensitic transformations speeding up the nucleation of new phases.
Online since: October 2013
Authors: Miroslav Janoš, Ivan Mrkvica
For machining was used milling cutter 100B06R-SMORP12X-B (fig. 1) with these parameters: external diameter 100 mm, number of teeth = 6, tool back rake gp = 5°, tool side rake gf = 0° [9].
Fig. 1 Milling cutter 100B06R-SMORP12X-B with cemented carbide inserts Four commercial coated carbide inserts (micro-grain hard metal and PVD multilayer coating TiN/TiAlN, resp.
Online since: February 2012
Authors: Shi Hong Zhang, De Hong Lu, Han Xiao, Yu Chun Dang
Yang et al. [3, 4] developed the LY12M hat-section profiles using the rotary draw bending machine, the effects of side pressure, stretching force and the number of rotary draw bending on the springback and section distortion were investigated.
Wu et al. [7, 8] investigated the influences of temperature, bending velocity and original grain size on the ovality, wall-thinning and springback of AM30 magnesium alloy tubes during the rotary draw bending process.
Online since: April 2012
Authors: Tian Yu Zhu, Fang Fei Dong, Bin Wang, Yan Qing Shen
Meanwhile, the joints brazing by crystalline one are easy to form a large number of cracks and brittle phases inside the joints, and it is well known that it has significant detrimental effects on the joint strength and ductility, which limits the applications of the filler metals to some extent [5, 6].
It is well known that boron diffuses extensively out of the joint area into stainless steel base metal during brazing at high temperatures and forms intermetallic boride phases at grain boundaries.
Online since: October 2006
Authors: Byung Min Kim, P.K. Seo, C.G. Kang
This is consistent with the relationship of B=µNI, where B is magnetic induction, µ is a coefficient, N is the number of turns of the coil, and I is the current.
However, in order to avoid the influence of grain size being masked by the effect of a large gate, a small gate was used in the current experiment, as shown in Fig. 1.
Online since: May 2011
Authors: Jun Ping Zhu, Jian Wu, Tian Tian Sun, Gui Fu Dai, Ya Can Zhao
If corncob residues and more lignocelluloses could be use as feedstock for L-lactic acid fermentation, turning “waste” useful, the grain problem would be alleviated.
All experiments in this report were carried out three times, and the numbers given were the mean values.
Online since: June 2010
Authors: Dmitry G. Eskin, Laurens Katgerman, Hallvard Gustav Fjær, Andreas Ten Cate, Nick Ontijt, Mehdi Lalpoor
Such stress raisers might be cracks, flaws, inclusions or any other void in the matrix or at the interface of the grains.
Acknowledgments This research was carried out under the project number MA.09147 in the framework of the Research Program of the Materials innovation institute M2i (www.m2i.nl).
Online since: January 2005
Authors: Chien Cheng Liu, Jow Lay Huang
These results showed that a large number of TiN grains in the Si3N4 matrix could be connected to each other and formed a thorough electrical conductive network leading to the increase in electrical conductivity.
Online since: January 2005
Authors: Hai Won Lee, Joo Sun Kim, H.W. Jun, Hyun Kwang Seok
Stewart et al reported that the wear resistance of thermal sprayed WC-Co coating obtained from nanopowders was lower than the expected one because of the decarburization of WC nanopowder originating from much higher surface area to volume ratio than conventional powder.[4] Skandan et al. developed a new class of feedstock powder, e.g. multimodal feedstock powder, containing hard aggregates of coarse- and nano-grained WC-Co particles.[5] The nanocrystalline component in multimodal feedstock powder might melt with relative ease, leading to strong binding and hard coating with the coarse particles being partially melted.
Acknowledgement The authors are grateful for the financial support by a grant (code number 04K1501-01210) from 'Center for Nanostructured Materials Technology' under '21st Century Frontier R&D Programs' of the Ministry of Science and Technology, Korea.
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