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Online since: November 2005
Authors: Marcello Filgueira, Guerold Sergueevitch Bobrovinitchii, F.T.C. Lima
Regarding samples sintered for 60sec, that attained relative
density by 75.4%, one can attribute this reduction in density to the extensive sintering time,
which promoted a partial graphitization of diamond (reverse transformation of carbon into the
compact cubic structure of diamond to the graphitic one - hexagonal).
Other aspect of interest is the reduction in hardness of the diamond composite when Co is substituted by Ni. 10 20 30 40 50 60 28 30 32 34 36 38 40 42 44 46 Hardness, HV (GPa) HPHT Sintering Time (seconds) 0 2 4 6 8 10 Figure 3.
It is the key for the comprehension of the difference in the hardness data presented in tab.1.Obviously it explains the low value of hardness of 42GPa of the diamond composite processed in the present paper.
Other aspect of interest is the reduction in hardness of the diamond composite when Co is substituted by Ni. 10 20 30 40 50 60 28 30 32 34 36 38 40 42 44 46 Hardness, HV (GPa) HPHT Sintering Time (seconds) 0 2 4 6 8 10 Figure 3.
It is the key for the comprehension of the difference in the hardness data presented in tab.1.Obviously it explains the low value of hardness of 42GPa of the diamond composite processed in the present paper.
Online since: October 2007
Authors: Xin Bo He, Yang Zhang, Li Chen, Xi Tao Wang
The data show that there is a good matching in the [001] direction and in the (0001)
plane.
So, the reduction of the interfacial thermal barrier resistance can only explained by taking into account the drop of mismatch between the matrix and the SiC particle caused by the addition of aluminum.
The addition of Al causes a contraction of lattice parameters and the reduction of the mismatch between the matrix and reinforcement phase.
So, the reduction of the interfacial thermal barrier resistance can only explained by taking into account the drop of mismatch between the matrix and the SiC particle caused by the addition of aluminum.
The addition of Al causes a contraction of lattice parameters and the reduction of the mismatch between the matrix and reinforcement phase.
Online since: September 2007
Authors: Yong Zheng, Wen Jun Liu, Zeng Min Shi
Data used for tool life evaluation were the mean values of six
individual tool lives.
The temperature was lower about 200-300˚C as compared to the high temperature 1000˚C with the cemented carbide inserts [11-12], which indicated that the use of the newly fabricated cermet tools could contribute to substantial reduction of the friction action between the flank and the workpiece and result in a decrease in heat generation.
Plastic deformation of the binder led to reduction in the interface binding force of the binder 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 10 20 30 40 50 60 NM VCmax (mm) cutting time(min) YT15 TN20 1000 u m b c d a Fig.2 Wear pattern of cermets insert against AISI1045 macroscopic flank wear patt (a)macroscopic flank wear pattern, (b) microscopic flank wear pattern(c)macroscopic crater wear pattern, (d)microscopic crater wear pattern and the ceramic grains.
The temperature was lower about 200-300˚C as compared to the high temperature 1000˚C with the cemented carbide inserts [11-12], which indicated that the use of the newly fabricated cermet tools could contribute to substantial reduction of the friction action between the flank and the workpiece and result in a decrease in heat generation.
Plastic deformation of the binder led to reduction in the interface binding force of the binder 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 10 20 30 40 50 60 NM VCmax (mm) cutting time(min) YT15 TN20 1000 u m b c d a Fig.2 Wear pattern of cermets insert against AISI1045 macroscopic flank wear patt (a)macroscopic flank wear pattern, (b) microscopic flank wear pattern(c)macroscopic crater wear pattern, (d)microscopic crater wear pattern and the ceramic grains.
Online since: April 2008
Authors: Zbigniew Muskalski, Andriy Milenin, Piotr Kustra
However, these take into account only few
parameters of drawing such as the die angle and reduction ratio.
The schedule of applied reductions is: 4.00→3.40→2.93→2.53→2.18→1.90→1.70 mm.
The flow curves of pearlitic phases are based on the literature data [10-11].
The schedule of applied reductions is: 4.00→3.40→2.93→2.53→2.18→1.90→1.70 mm.
The flow curves of pearlitic phases are based on the literature data [10-11].
Online since: February 2009
Authors: Hiroshi Mizumoto, Makoto Yabuya
Such a motion reduction mechanism is effective for sub-nanometer and picometer
positioning.
The analogue displacement of the table is converted into digital data by an AD converter of the controller.
Mizumoto, et al., "Picometer Positioning System using Aerostatic Guideway as Motion-Reduction Mechanism," Proceedings of 16th Annual Meeting of the American Society for Precision Engineering, Vol.1, (2001), pp.119-122
The analogue displacement of the table is converted into digital data by an AD converter of the controller.
Mizumoto, et al., "Picometer Positioning System using Aerostatic Guideway as Motion-Reduction Mechanism," Proceedings of 16th Annual Meeting of the American Society for Precision Engineering, Vol.1, (2001), pp.119-122
Online since: August 2009
Authors: Ji Yong Zheng, Yan Lei Peng, Cun Guo Lin, Li Wang, Lan Lan Di, Dong Xia Duan, Hui Ding, Jin Wei Zhang, Juan Zhou
The data are expressed as mean ±S.D. for four replicates of each test substance against control.
Especially, the MIC of EE2 against diatom was 0.4mg/ml, with a relative reduction of 43% compared with YC-EA (Figure 2b).
Mussels were inhibited by EE2 in the seawater with the concentration of not less than 0.3 mg/ml, with a reduction of 50% compared with YC-EA (see Fig. 3b).
Especially, the MIC of EE2 against diatom was 0.4mg/ml, with a relative reduction of 43% compared with YC-EA (Figure 2b).
Mussels were inhibited by EE2 in the seawater with the concentration of not less than 0.3 mg/ml, with a reduction of 50% compared with YC-EA (see Fig. 3b).
Online since: May 2004
Authors: Xue Jian Liu, Zhi Yong Huang, Li Ping Huang
Increasing the NH3/SiH4 ratio leads to a rapid decrease in the growth rate,
which results from the reduction in partial pressure of SiH4 and its enhanced competition with NH3
for available surface site.
The XPS data indicated that most of the silicon present was in the form of a nitride at a binding energy of 101.5-101.8eV with a small amount of silicon present in the form of element at a binding energy of 99.1-99.3eV as the NH3/SiH4 ratio varied between 1 and 2.
A rapid decrease in growth rate was observed with high NH3/SiH4 ratios due to a reduction in the partial pressure of SiH4 and its enhanced competition with NH3 for available surface sites.
The XPS data indicated that most of the silicon present was in the form of a nitride at a binding energy of 101.5-101.8eV with a small amount of silicon present in the form of element at a binding energy of 99.1-99.3eV as the NH3/SiH4 ratio varied between 1 and 2.
A rapid decrease in growth rate was observed with high NH3/SiH4 ratios due to a reduction in the partial pressure of SiH4 and its enhanced competition with NH3 for available surface sites.
Online since: June 2010
Authors: Maciej Suliga
From
the data presented in Fig. 4 it can be found that applying large values of individual drafts (Variant A
- Gav= 26.5 %) in the wire drawing process causes a significant increase in non-dilatational strains.
The greater hardening of sub-surface layers in wires drawn with higher individual drafts might have contributed to the reduction of their bending strength.
Applying large individual drafts in the drawing process results in an increase in the number of twists of wires averagely by 8%, and may contribute to a considerable reduction in their bending strength (by about 20%)
The greater hardening of sub-surface layers in wires drawn with higher individual drafts might have contributed to the reduction of their bending strength.
Applying large individual drafts in the drawing process results in an increase in the number of twists of wires averagely by 8%, and may contribute to a considerable reduction in their bending strength (by about 20%)
Online since: July 2012
Authors: Guo Chen Zheng, Ajay Kumar Jha, Zhao Han Zhang, Yong Sheng Zhao, Feng Zhao, Wei Li, Jian Zheng Li, Zhu Jun Tian, Shuang Shi Dong
Coenzyme Ⅰ oxidation and reduction [(NAD++H2)/(NADH+H+)] can also produce some hydrogen, and propionic acid fermentation pathway does not produce hydrogen, which is difficult to break acid fermentation bacteria 4 mol H2/molG [5].
Limited data on hydrogen yielded from wastewater sludge have been presented at conferences.
It has several advantages, including volume reduction, waste stabilization, and biogas recovery.
Limited data on hydrogen yielded from wastewater sludge have been presented at conferences.
It has several advantages, including volume reduction, waste stabilization, and biogas recovery.
Online since: October 2011
Authors: D. Şen, N. Kilincaslan, G. Akgungor
Tooth preparation includes 0.7 mm. labial reduction with a subgingival champfer finish line.
The incisal edge reduction was 1 mm. and a butt joint preparation was chosen to provide more translucency in the incisal region(Fig. 2).
Continued observation and addition of cases will be necessary to extend the data base and provide definitive conclusive evidence for the dependability of the new CAD-CAM restoration techniques.
The incisal edge reduction was 1 mm. and a butt joint preparation was chosen to provide more translucency in the incisal region(Fig. 2).
Continued observation and addition of cases will be necessary to extend the data base and provide definitive conclusive evidence for the dependability of the new CAD-CAM restoration techniques.