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Online since: December 2014
Authors: Aleksandr Aleksandrovich Fomin, Marina Alekseevna Fomina, Igor Vladimirovich Rodionov, Albert Viktorovich Korolev
Regimes of the coating samples were assigned to double numbers: the first number corresponded to the temperature of titanium base IHT, the second marked the heat treatment duration measured in seconds.
The nanometer scale research reveals the fine structure presented by rounded grains, their agglomerates and the smallest pores (Fig. 3).
The nanometer scale research reveals the fine structure presented by rounded grains, their agglomerates and the smallest pores (Fig. 3).
Online since: October 2014
Authors: Mohd Mustafa Al Bakri Abdullah, Ali Basheer Azeez, Azmi Rahmat, Andrei Victor Sandhu, Hussin Kamarudin, Liyana Jamaludin, Kahtan S. Mohammed
At the grain boundary, there is a combination of W and Cu.
Smaller mfp values is an indication of higher number of interaction of the incident radiation beam with the atoms of the sample(s) being tested.
The high number of interaction as the distance between successive collisions reduces resulted in large attenuation values.
Smaller mfp values is an indication of higher number of interaction of the incident radiation beam with the atoms of the sample(s) being tested.
The high number of interaction as the distance between successive collisions reduces resulted in large attenuation values.
Online since: June 2004
Authors: Marek Skowronski, David Snyder, M. Fanton, Saurav Nigam, B. Weiland, Sung Wook Huh, Hun Jae Chung
Equation 1 illustrates
the basic SiC deposition reaction when SiCl4 is used as the Si source.
3 SiCl4(g) + C3H8(g) + 2 H2(g) � 3 SiC(s) + 12 HCl(g) (1)
Growth rate is influenced by a number of variables.
The presence of hydrogen as a reactant in Equation 1 requires that a balance be struck between supplying enough hydrogen to drive the reaction forward and too much hydrogen which promotes etching and decreases the 0 20 40 60 80 100 120 140 1950 2000 2050 2100 2150 Seed Holder Temperature (C) Growth Rate (um/hr) 50% Reactant Flow 100% Reactant Flow Journal Title and Volume Number (to be inserted by the publisher) 3 growth rate.
The narrow peak widths show that wafers processed from HCVD material have low internal stress, very few low angle grain boundaries, and little or no polytype inclusions.
The presence of hydrogen as a reactant in Equation 1 requires that a balance be struck between supplying enough hydrogen to drive the reaction forward and too much hydrogen which promotes etching and decreases the 0 20 40 60 80 100 120 140 1950 2000 2050 2100 2150 Seed Holder Temperature (C) Growth Rate (um/hr) 50% Reactant Flow 100% Reactant Flow Journal Title and Volume Number (to be inserted by the publisher) 3 growth rate.
The narrow peak widths show that wafers processed from HCVD material have low internal stress, very few low angle grain boundaries, and little or no polytype inclusions.
Online since: December 2014
Authors: Janette Brezinová, Anna Guzanová, Jozef Bronček, Dagmar Draganovská
The surface of the base material was blasted before spraying by white corundum with grain size of 0.7 mm, air pressure 0.4 MPa, stand-off 300 mm, impact angle of 90 °.
According to Faraday's law, there is a linear relationship between the metal dissolution rate or corrosion rate, icorr (1): RM=MηFρicorr (1) where M is the atomic weight of the metal, ρ is the density, η is the charge number which indicates the number of electrons exchanged in the dissolution reaction and F is the Faraday constant, (96.485 C/mol).
According to Faraday's law, there is a linear relationship between the metal dissolution rate or corrosion rate, icorr (1): RM=MηFρicorr (1) where M is the atomic weight of the metal, ρ is the density, η is the charge number which indicates the number of electrons exchanged in the dissolution reaction and F is the Faraday constant, (96.485 C/mol).
Online since: January 2011
Authors: Karel Obrtlík, Martin Juliš, Marta Kianicová, Tomáš Podrábský, Simona Hutařová, Ondřej Dvořáček
The average grain size, 2.3 mm, was found by the linear intercept method.
The outer zone is mostly formed by the β NiAl phase (dark area in Fig. 2) with a small number of evenly distributed small precipitates of complex phases of Al-Ni and Al-Cr-Ni (see spots 1 and 2 in Fig. 2).
The number of fatigue cracks initiated at the surface is higher in coated specimens than in uncoated ones.
The outer zone is mostly formed by the β NiAl phase (dark area in Fig. 2) with a small number of evenly distributed small precipitates of complex phases of Al-Ni and Al-Cr-Ni (see spots 1 and 2 in Fig. 2).
The number of fatigue cracks initiated at the surface is higher in coated specimens than in uncoated ones.
Online since: January 2013
Authors: Alla A. Sitnikova, Sergey P. Lebedev, Natasha V. Seredova, Alla S. Tregubova, Demid A. Kirilenko, Mikhail P. Scheglov, Alexander A. Lebedev
As the SiC source served a high-purity fine-grained SiC powder.
At higher temperatures (>1900 оС), the defect density and number of TBs increased.
A variation of the supersaturation for Si-face changes 3C nucleation conditions and, due to the irregular temperature distribution on substrate surfaces, this leads to growth of 6H inclusions and to a larger number of SFs and TBs.
At higher temperatures (>1900 оС), the defect density and number of TBs increased.
A variation of the supersaturation for Si-face changes 3C nucleation conditions and, due to the irregular temperature distribution on substrate surfaces, this leads to growth of 6H inclusions and to a larger number of SFs and TBs.
Online since: December 2013
Authors: Yun Yong Kim, Jin Wook Bang, Jung Hwan Hyun, Byung Jae Lee, Dong Su Joung
Two types of fine silica sand with densities of 2.60 g/cm3 were used, and an average grain size of 150 μm was maintained.
Table 2 Mix proportions and curing conditions of the SHCC panel * All numbers are weights/m3 Experimental Program SHCC panel Manufacturing Process A Hobart asphalt mixer with a maximum capacity of 15 liter was used to mix the SHCC.
A large number of micro-cracks were seen in the pure bending region. 2.
Table 2 Mix proportions and curing conditions of the SHCC panel * All numbers are weights/m3 Experimental Program SHCC panel Manufacturing Process A Hobart asphalt mixer with a maximum capacity of 15 liter was used to mix the SHCC.
A large number of micro-cracks were seen in the pure bending region. 2.
Online since: July 2014
Authors: Zhi Tao Mu, Xu Dong Li, Guang Ming Kong
Typical fatigue fracture surface of pre-corroded AA 6A02 coupons are shown in Fig.3, which presents the large number of fatigue cracks (dark grey areas) that have grown around the entire circumference of the fracture surface.
The crack initiation region is a very short fan-shaped area, and most of them became smooth and bright regions due of micro-mechanism of the accumulative plastic slipping of surface grains.
Crack initiation region Crack instantly fracture area Slippage mark Crack steadily Extension area Fig.3 Fatigue fracture morphology in macro-scale Because of the large number of corrosion pits and the effectiveness of these pits as stress concentration sites during fatigue, fatigue crack initiation from these pits is often observed.
The crack initiation region is a very short fan-shaped area, and most of them became smooth and bright regions due of micro-mechanism of the accumulative plastic slipping of surface grains.
Crack initiation region Crack instantly fracture area Slippage mark Crack steadily Extension area Fig.3 Fatigue fracture morphology in macro-scale Because of the large number of corrosion pits and the effectiveness of these pits as stress concentration sites during fatigue, fatigue crack initiation from these pits is often observed.
Online since: August 2013
Authors: Musa Hakan Arslan, Murat Ozturk, Mevlut Yasar Kaltakci, Hasan Husnu Korkmaz, Mehmet Kamanli
Introduction
In Turkey, generally, building stock is formed from reinforced concrete (RC) structures and during the latest earthquakes, a large number of these buildings collapsed leading to widespread destruction and loss of life [1].
The concrete aggregates had been used in their natural states without being washed or sieved and that the grain distribution was not suitable good concrete quality.
In addition, many columns had f14 longitudinal reinforcements instead of f16, and the number of longitudinal reinforcements in some columns had been changed.
The concrete aggregates had been used in their natural states without being washed or sieved and that the grain distribution was not suitable good concrete quality.
In addition, many columns had f14 longitudinal reinforcements instead of f16, and the number of longitudinal reinforcements in some columns had been changed.
Online since: December 2014
Authors: Ming Jie Bi, Jun E Liu
Where: Mi = (ci, Vi) is characterized by element, Vi is the number of characteristics ci on the magnitude of the field (i = 1,2, ..., n).
Field values with interval numbers:X1=<900,1000>, X2=<85,95>, X3=<85,90>, X4=<170,190>, X5=<80,100>.
[7] Zhang Hong-tao, Mao Han-ping.Four kinds of objective weight determination method of pests in stored grain extension classification application[J].Transactions of the CSAE, 2009, 25(1):132-136
Field values with interval numbers:X1=<900,1000>, X2=<85,95>, X3=<85,90>, X4=<170,190>, X5=<80,100>.
[7] Zhang Hong-tao, Mao Han-ping.Four kinds of objective weight determination method of pests in stored grain extension classification application[J].Transactions of the CSAE, 2009, 25(1):132-136