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Online since: January 2010
Authors: Zhi Yong Ling, Zhen Fan, J.N. Ding, Guang Gui Cheng
Result and Discussion
Fig 1(a) and fig 1(b)are topographical and phase images of SEBS/A187/Si, we could find that the
films were smooth and isotropy made by SAM procedure, the micro grains on the topographical
images were homogeneously distributed.
Fig 2 present topographical and section images of DLC/SEBS/A187/Si, and the size of its micro grains was 20 nm and the surface roughness Ra=0.56 nm.
The wear trace was shown in fig5, where there were a number of grooves on the surface.
Fig 2 present topographical and section images of DLC/SEBS/A187/Si, and the size of its micro grains was 20 nm and the surface roughness Ra=0.56 nm.
The wear trace was shown in fig5, where there were a number of grooves on the surface.
Online since: July 2016
Authors: María Cristina Gely, Ana María Pagano, Viatcheslav Kafarov, Verónica Elizabeth Capdevila
Such is the case of Friend [7], who investigated the incorporation of whey to classical fermentation of grains; Oda also [8] investigated the combination of molasses and whey for the production of bioethanol.
Operative conditions of the main equipment Design parameter V-101 CSTR-100 CSTR-101 CSTR-102 T-100 T-102 T [ºC] 106.4 140 40 37 25-31 90-110 P [kPa] 101.3 101.3 101.3 101.3 101.3 101.3 Number of plates 10 10 The current "To Absorption Tower 2" coming out of the Fermenter reactor “CSTR-102”, consisting of a dilute solution of ethanol with traces of other compounds, was treated in the Absorption Column (T-102) designed in 10 stages, with the aim of removing water, yielding the ethanol (stream "Bioethanol") from the top of the column.
Shahani, Industrial alcohol production via whey and grain fermentation, Agricultural Waste. 4 (1982) 55-63
Operative conditions of the main equipment Design parameter V-101 CSTR-100 CSTR-101 CSTR-102 T-100 T-102 T [ºC] 106.4 140 40 37 25-31 90-110 P [kPa] 101.3 101.3 101.3 101.3 101.3 101.3 Number of plates 10 10 The current "To Absorption Tower 2" coming out of the Fermenter reactor “CSTR-102”, consisting of a dilute solution of ethanol with traces of other compounds, was treated in the Absorption Column (T-102) designed in 10 stages, with the aim of removing water, yielding the ethanol (stream "Bioethanol") from the top of the column.
Shahani, Industrial alcohol production via whey and grain fermentation, Agricultural Waste. 4 (1982) 55-63
Online since: January 2016
Authors: Yoshimasa Takayama, Fumio Ono, Yoshinobu Motohashi, Koichi Kitazono
It is noted that these standards are constituted for metallic superplastic materials having fine crystal grains, in particular for aluminum and titanium alloys.
Kuribayashi, Unified Interpretation of Internal Stress Superplasticity Models Based on Thermally-Activated Kinetics, Acta mater. 47 (1999) 1653-1660. ] and fine grain superplasticity in ceramics [[] F.
The special experimental device limits the superplastic tensile tests to a small number of institutes.
Kuribayashi, Unified Interpretation of Internal Stress Superplasticity Models Based on Thermally-Activated Kinetics, Acta mater. 47 (1999) 1653-1660. ] and fine grain superplasticity in ceramics [[] F.
The special experimental device limits the superplastic tensile tests to a small number of institutes.
Online since: June 2014
Authors: Zi Qiao Zheng, Xian Fu Luo, Min Jia
So far, the effects of addition of Sc are believed to be positive in most cases, such as to refine grains, improve strength together with ductility and weldability [2].
(a) and (b) respectively, indicating that alloy B shows a great number of coarse particles distributed along the rolling direction and these coarse particles are brighter and whiter than those in alloy A, which means that these particles contain more heavy elements.
Besides, the coarse brittle second phase particles, like the W phase, inhibit the migration of grain boundary and thus has a negative effect on the compatible deformation and plastic flow of the alloy.
(a) and (b) respectively, indicating that alloy B shows a great number of coarse particles distributed along the rolling direction and these coarse particles are brighter and whiter than those in alloy A, which means that these particles contain more heavy elements.
Besides, the coarse brittle second phase particles, like the W phase, inhibit the migration of grain boundary and thus has a negative effect on the compatible deformation and plastic flow of the alloy.
Online since: May 2014
Authors: Tsuyoshi Mayama, Hirohiko Takuda, Takayuki Hama
However the number of applications of Mg alloy sheets to structural components is still small.
To take into account the effect of difference in a grain size (20mm and 100 mm for rolled and cast sheets, respectively), we also assume that the Hall-Petch law is applicable to the critical resolved shear stress, i.e. t0 in eq. is adjusted using the Hall-Petch law [18].
Ohori, Grain refinement of AZ31 magnesium alloy sheets fabricated by rolled and heat treated twin roll cast plate, Journal of Japan Institute of Light Metals, 58 (2008), pp.22-26.
To take into account the effect of difference in a grain size (20mm and 100 mm for rolled and cast sheets, respectively), we also assume that the Hall-Petch law is applicable to the critical resolved shear stress, i.e. t0 in eq. is adjusted using the Hall-Petch law [18].
Ohori, Grain refinement of AZ31 magnesium alloy sheets fabricated by rolled and heat treated twin roll cast plate, Journal of Japan Institute of Light Metals, 58 (2008), pp.22-26.
Online since: April 2014
Authors: Si Rong Yu, Qi Lou, Wei Du, Hong Chao Chu
Introduction
With the world oil supply situation is grim and oil prices is booming, a number of oil and gas fields with harsh geological and environment conditions have been put into developing, new technologies of drilling and completion and new processes have been put into use, thus the service conditions of OCTG (Oil Country Tubular Goods, including oil and gas well casing and tubing) become complex and severe increasingly.[1] Service conditions of casing and tubing Contains two aspects: loads and environment.
Nonmetallic inclusion Microstructure Average grain size Type A Type B Type C Type D Thin Heavy Thin Heavy Thin Heavy Thin Heavy 1# 0.5 0 0.5 0 0 0 0.5 0 Tempered sorbite 8.0 2# 0.5 0 0.5 0 0 0 0.5 0 Tempered sorbite 8.0 (a) (b) (c) (d) Fig. 3 Optical micrographs of the side face of fracture a- Microstructure of 1#; b- Microstructure of nearby fracture; c- Microstructure of necking; d- Microstructure of 2# Microscopic Analysis of Fracture.The fracture surface was analyzed by SEM and EDS.
Metallographic analysis results show that the two specimens bath had a little of nonmetallic inclusion and their grain size were fine.
Nonmetallic inclusion Microstructure Average grain size Type A Type B Type C Type D Thin Heavy Thin Heavy Thin Heavy Thin Heavy 1# 0.5 0 0.5 0 0 0 0.5 0 Tempered sorbite 8.0 2# 0.5 0 0.5 0 0 0 0.5 0 Tempered sorbite 8.0 (a) (b) (c) (d) Fig. 3 Optical micrographs of the side face of fracture a- Microstructure of 1#; b- Microstructure of nearby fracture; c- Microstructure of necking; d- Microstructure of 2# Microscopic Analysis of Fracture.The fracture surface was analyzed by SEM and EDS.
Metallographic analysis results show that the two specimens bath had a little of nonmetallic inclusion and their grain size were fine.
Online since: May 2014
Authors: Jun Yan Wu, Qiang Shen, Fei Chen, Julie M. Schoenung, Lian Meng Zhang
Wang et al discovered that with the increase of sputtering power, the grain size of the films got larger and the crystallization became better [12].
(1) where TC(hkl) is the texture coefficient of the (hkl) plane, I(hkl) the measured intensity of (hkl) plane, I0(hkl) the corresponding recorded intensity in JCPDS data file and N the number of preferred directions of the growth.
It is clear that ATO films show good crystalline when deposited at high temperature of 550 oC and the grain size decreases with the increasing of laser energy density.
(1) where TC(hkl) is the texture coefficient of the (hkl) plane, I(hkl) the measured intensity of (hkl) plane, I0(hkl) the corresponding recorded intensity in JCPDS data file and N the number of preferred directions of the growth.
It is clear that ATO films show good crystalline when deposited at high temperature of 550 oC and the grain size decreases with the increasing of laser energy density.
Online since: July 2015
Authors: Musyarofah Musyarofah, Triwikantoro Triwikantoro, Pratapa Suminar, Egidius Dewa, Upik Nurbaiti, Sukma Firdaus
During the heating process, therefore, the samples underwent a reaction sintering where new phases form and the constituting particles unite and form bonds, develop grains and grain boundaries, and crystallizing [10].
Acknowledgements Gratitude are to the Ministry of Education and Culture of the Republic of Indonesia through LPPM ITS who has partially funded this research through the EPI-Unet program under the contract number 013674.36/IT2.7/PN.01.01/2013 given to SP.
Acknowledgements Gratitude are to the Ministry of Education and Culture of the Republic of Indonesia through LPPM ITS who has partially funded this research through the EPI-Unet program under the contract number 013674.36/IT2.7/PN.01.01/2013 given to SP.
Online since: August 2014
Authors: Jurgen Eckert, Mircea Nicoara, Aurel Raduta, Cosmin Locovei, Mihai Stoica
A literature research could identify a number of 3 concurrent research directions for reducing stiffness of titanium alloys, i.e.:
- Fabrication of porous Ti alloys, where stiffness is reduced to any desired values by increasing the proportions of pores, so open-cell or closed-cell metallic foams are obtained, depending on fabrication route.
State-of-the-Art in Titanium-Based Bulk Metallic Glasses Bulk metallic glasses (BMGs) on titanium base represent attractive materials for implant applications, since they have some very important key features: - High strength and hardness that could provide good load bearing capability and high wear resistance to orthopedic and dental implants; - Lower Young's modulus will result in better load transfer to the surrounding bone, which reduces the stress-shielding effect; - The excellent corrosion resistance of titanium alloys is enhanced by amorphous structure, without grain limits and other structural non-homogeneities, which minimizes ion release in the human body; - They could have excellent formability by deformation, allowing fabrication of implants with very precise and versatile geometries, within the temperature range between glass transition point Tg and crystallization point Tx; - Titanium-based bulk metallic glasses can support in vitro cell adhesion and growth of living
As seen in figure 5, crystalline microstructure is very fine, with grains only few tens of interatomic distances in size.
State-of-the-Art in Titanium-Based Bulk Metallic Glasses Bulk metallic glasses (BMGs) on titanium base represent attractive materials for implant applications, since they have some very important key features: - High strength and hardness that could provide good load bearing capability and high wear resistance to orthopedic and dental implants; - Lower Young's modulus will result in better load transfer to the surrounding bone, which reduces the stress-shielding effect; - The excellent corrosion resistance of titanium alloys is enhanced by amorphous structure, without grain limits and other structural non-homogeneities, which minimizes ion release in the human body; - They could have excellent formability by deformation, allowing fabrication of implants with very precise and versatile geometries, within the temperature range between glass transition point Tg and crystallization point Tx; - Titanium-based bulk metallic glasses can support in vitro cell adhesion and growth of living
As seen in figure 5, crystalline microstructure is very fine, with grains only few tens of interatomic distances in size.
Online since: April 2015
Authors: Hussin Kamarudin, Mien Van Tran, Dang Thi Thuy Hang
Fly ash is a fine collection of waste from the combustion of coal in thermal power plants, spherical, very fine grain size.
For the first time, the role of fly ash is the fine-grained backfill pore structure of cement stone.
Acknowledgements This research is funded by Vietnam National University HoChiMinh City (VNU-HCM) under grant number C2014-20-17.
For the first time, the role of fly ash is the fine-grained backfill pore structure of cement stone.
Acknowledgements This research is funded by Vietnam National University HoChiMinh City (VNU-HCM) under grant number C2014-20-17.