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Online since: July 2014
Authors: P. Mahanta, Lalhmingsanga Hauchhum
Materials and Method
The adsorbent materials like zeolite 4A and zeolite 13X were purchased from local chemist.
Fig. 3 CO2 adsorption isotherms on zeolite 13X Fig. 4 CO2 adsorption isotherms on zeolite 4A Table 3 Toth constants and their regression coefficients Toth constant Δq% Mate- rial Temp (°C) b n R2 Zeolite 13X 25 3.945 12.037 0.957 6.9 35 3.572 11.874 0.988 8.9 45 3.125 9.743 0.967 8.9 60 3.074 7.201 0.978 11.7 Zeolite 4A 25 3.153 10.032 0.987 7.4 35 2.971 9.075 0.974 9.5 45 2.763 7.547 0.989 7.9 60 2.374 6.012 0.975 10.5 Table 4 Sips constants and their regression coefficients Sips constant Δq% Mate- rial Temp(°C) b n R2 Zeolite 13X 25 4.845 12.037 0.991 7.9 35 4.371 11.874 0.992 6.7 45 3.925 9.743 0.983 5.2 60 3.474 7.201 0.987 8.7 Zeolite 4A 25 3.353 10.032 0.997 5.4 35 2.991 9.075 0.989 7.5 45 2.676 7.547 0.999 6.9 60 2.378 6.012 0.985 9.5 Regeneration studies Fig. 5 Adsorption isotherms of zeolite 13 X Fig. 6 Adsorption isotherms of zeolite 4A The two adsorbents were tested for material aging by using the same adsorbent over 5 adsorption
This indicated that the adsorption is not reversible and complete regeneration cannot be obtained by adsorption of the material after adsorption.
Mahanta, Kinetic, Thermodynamic and Regeneration Studies for CO2 Adsorption onto Activated Carbon, International Journal of Advanced Mechanical Engineering. 4(1), 27-32 (2014)
Springer Science and Business Media, Inc, Boston (2005)
Fig. 3 CO2 adsorption isotherms on zeolite 13X Fig. 4 CO2 adsorption isotherms on zeolite 4A Table 3 Toth constants and their regression coefficients Toth constant Δq% Mate- rial Temp (°C) b n R2 Zeolite 13X 25 3.945 12.037 0.957 6.9 35 3.572 11.874 0.988 8.9 45 3.125 9.743 0.967 8.9 60 3.074 7.201 0.978 11.7 Zeolite 4A 25 3.153 10.032 0.987 7.4 35 2.971 9.075 0.974 9.5 45 2.763 7.547 0.989 7.9 60 2.374 6.012 0.975 10.5 Table 4 Sips constants and their regression coefficients Sips constant Δq% Mate- rial Temp(°C) b n R2 Zeolite 13X 25 4.845 12.037 0.991 7.9 35 4.371 11.874 0.992 6.7 45 3.925 9.743 0.983 5.2 60 3.474 7.201 0.987 8.7 Zeolite 4A 25 3.353 10.032 0.997 5.4 35 2.991 9.075 0.989 7.5 45 2.676 7.547 0.999 6.9 60 2.378 6.012 0.985 9.5 Regeneration studies Fig. 5 Adsorption isotherms of zeolite 13 X Fig. 6 Adsorption isotherms of zeolite 4A The two adsorbents were tested for material aging by using the same adsorbent over 5 adsorption
This indicated that the adsorption is not reversible and complete regeneration cannot be obtained by adsorption of the material after adsorption.
Mahanta, Kinetic, Thermodynamic and Regeneration Studies for CO2 Adsorption onto Activated Carbon, International Journal of Advanced Mechanical Engineering. 4(1), 27-32 (2014)
Springer Science and Business Media, Inc, Boston (2005)
Online since: July 2014
Authors: Jia Chuan Yan, Qiong Hu, Fa Xin Chen, Chao Ying Zou, Chen Jia
Test overview
Raw materials.
Parameters of these raw materials are shown in table 1 to table 3.
Acknowledgments This work was financially supported by the National Natural Science Foundation project (51278151) and by National Training Programs of Innovation and Entrepreneurship for Undergraduates.
Construction and Building Materials, 2009, 23(2): 872-877
Journal of ASTM International, 2008, 5(1): 12
Parameters of these raw materials are shown in table 1 to table 3.
Acknowledgments This work was financially supported by the National Natural Science Foundation project (51278151) and by National Training Programs of Innovation and Entrepreneurship for Undergraduates.
Construction and Building Materials, 2009, 23(2): 872-877
Journal of ASTM International, 2008, 5(1): 12
Online since: December 2006
Authors: Fei Xie, Qiu Hua Zhu, Jin Jun Lu
Influence of Direct Current Field on Powder-pack Boriding
Fei XIE Qiuhua ZHU Jinjun LU
Materials Science and Engineering Department, Jiangsu Polytechnic University, Changzhou,
Jiangsu Province, 213016, P.
Soaking in conventional powder-pack boriding (CPB) usually lasts for 3~8 hours at the temperature range of 850�1000� to obtain a layer of boride (FeB-Fe2B) with thickness of 30�200µm according to the requirement of machine part and the property of the treated material[1~4].
Schematic of the main part of the experimental apparatus:� 1) Lid�2) Specimens as cathode�3) Thermo-couple�4) Device for temperature measuring � 5) ceramic protection tube � 6) Voltage-controllable DC supplier�(7) Conducting line�(8) Boriding container�9) Boriding agent�10) Specimens as anode�11) Sealing material Table 1.
Comparison of the layer thickness of DCFPB and CPB specimens���%�)H furnace temperature: ��°С���� Boride layer thickness�[µm] Materials Opposite side of cathode specimens Opposite side of anode specimens CPB specimens 20 steel 105 70 55 45 steel 97 65 42 T12 steel 62.5 50 32 Influence of DCF current.
Journal of Rare Earth 18, 205 (2000).
Soaking in conventional powder-pack boriding (CPB) usually lasts for 3~8 hours at the temperature range of 850�1000� to obtain a layer of boride (FeB-Fe2B) with thickness of 30�200µm according to the requirement of machine part and the property of the treated material[1~4].
Schematic of the main part of the experimental apparatus:� 1) Lid�2) Specimens as cathode�3) Thermo-couple�4) Device for temperature measuring � 5) ceramic protection tube � 6) Voltage-controllable DC supplier�(7) Conducting line�(8) Boriding container�9) Boriding agent�10) Specimens as anode�11) Sealing material Table 1.
Comparison of the layer thickness of DCFPB and CPB specimens���%�)H furnace temperature: ��°С���� Boride layer thickness�[µm] Materials Opposite side of cathode specimens Opposite side of anode specimens CPB specimens 20 steel 105 70 55 45 steel 97 65 42 T12 steel 62.5 50 32 Influence of DCF current.
Journal of Rare Earth 18, 205 (2000).
Online since: April 2014
Authors: Sheng Lei Che, Li Qiang Jiang, Xiao Long Li, Dong Liu, Yao Ying, Ling Zhang
Influence of Particle Size and Ca Addition on the Magnetic Performance and Microstructure of Mnzn Ferrite
Ling Zhang, Xiaolong Li, Dong Liu, Yao Ying, Liqiang Jiang and Shenglei Che*
Research Center of Magnetic and Electronic Materials, College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
cheshenglei@zjut.edu.cn
Keywords: MnZn ferrite, Microstructure, Electromagnetic performance, Grain size.
Tsay, et al, Improvement on magnetic power loss of MnZn-ferrite materials by V2O5 and Nb2O5 co-doping, J.
Murase, Dissolution and Segregation Behavior of Ca in the Sintering Process of MnZn Ferrite, Journal of Japan Society of Powder and Powder Metallurgy, 2009, 56(3)111-115.
Tsay, et al, Improvement on magnetic power loss of MnZn-ferrite materials by V2O5 and Nb2O5 co-doping, J.
Murase, Dissolution and Segregation Behavior of Ca in the Sintering Process of MnZn Ferrite, Journal of Japan Society of Powder and Powder Metallurgy, 2009, 56(3)111-115.
Online since: April 2012
Authors: Guido Schmitz, Andriy Gusak, Nadiya Storozhuk
Peculiarities of nucleation kinetics at interfaces of reacting materials is studied much less [16-17, 13].
Feldman, Electronic Thin Film Science - for Electrical Engineers and Materials Scientists, Macmillan, NY, 1992
Tu, Solder Joint Technology: Materials, properties, and reliability, Springer, 2007
Gusak, Ukrainian Physical Journal 35 (1990), p.725
Feldman, Electronic Thin Film Science - for Electrical Engineers and Materials Scientists, Macmillan, NY, 1992
Tu, Solder Joint Technology: Materials, properties, and reliability, Springer, 2007
Gusak, Ukrainian Physical Journal 35 (1990), p.725
Online since: March 2004
Authors: Dong Il Kwon, Yun Hee Lee, Jae Il Jang
Kwon1
1
School of Materials Science and Engineering, Seoul National University,
Shilim-dong, Gwanak-gu, Seoul 151-744, Korea,
2
Frontics, Inc., Research Institute of Advanced Materials, Seoul National University,
Shilim-dong, Gwanak-gu, Seoul 151-744, Korea
Keywords: Residual stress, Instrumented indentation, Contact deformation, Stress directionality
Abstract: A theoretical model has been proposed to assess quantitative residual stress from a
stress-induced shift in an indentation curve, but the assumption in this model of equibiaxial surface
stress has obstructed its application to real structures in complex stress states.
Introduction An instrumented indentation technique, developed to characterize the mechanical properties of small-volume materials [1-4], is adopted as a nondestructive stress-measurement method.
While the curve shift in the Journal Title and Volume Number (to be inserted by the publisher) pure-shear state is negligible, the amount of the stress-induced load shift is linearly proportional to the applied average stress because the averaged effects of the surface biaxial stress are transmitted along a unique indenter column.
Introduction An instrumented indentation technique, developed to characterize the mechanical properties of small-volume materials [1-4], is adopted as a nondestructive stress-measurement method.
While the curve shift in the Journal Title and Volume Number (to be inserted by the publisher) pure-shear state is negligible, the amount of the stress-induced load shift is linearly proportional to the applied average stress because the averaged effects of the surface biaxial stress are transmitted along a unique indenter column.
Online since: July 2011
Authors: Wei Ping Chen, Yu Deng, Zhe Liu
Influence of Melt Holding Time on Microstructure and Mechanical Properties of Ductile Iron
Zhe Liu1, a, Weiping Chen1,b and Yu Deng1,c
1State Engineering Research Center for Metallic Materials Net-shape Processing, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
aliuzhe2012@hotmail.com, bmewpchen@scut.edu.cn, c714732095@qq.com
Key words: Ductile iron, Cooling rate, Antimony, Microstructure
Abstract.
Experimental Material and Procedure The melting process was carried out in a medium-frequency induction furnace of 30kg in capacity.
The charge materials used were pig iron and steel scrap.
Acknowledgements This work was financially supported by the Significant Science and Technology Project of Guangdong-Energy conservation and emission reduction and renewable energy(2008A080800022).
Journal of rare earths Vol. 24 (2006), pp. 103-107
Experimental Material and Procedure The melting process was carried out in a medium-frequency induction furnace of 30kg in capacity.
The charge materials used were pig iron and steel scrap.
Acknowledgements This work was financially supported by the Significant Science and Technology Project of Guangdong-Energy conservation and emission reduction and renewable energy(2008A080800022).
Journal of rare earths Vol. 24 (2006), pp. 103-107
Online since: March 2010
Authors: Hai Bo Lin, Guo Zhe Yang
General
With the development of science and technology, the measurement will be changed from micro to
nano in the manufacturing field.
At present, in some industrial field, requirements have been put forward for nano scale micro-positioning table, such as semiconductor devices, optics, manufacturing of miniature and special materials processing, etc.
The precision ceramic type linear motor is selected to drive this system based on the comparison of performance, and the precision piezoelectric ceramic motor is adopted as the driving components, which has the characteristic of small size, low cost, high power output, fast response and high precision and no electromagnetic interference, its driving principle is adopted the piezoelectric materials.
Since the granite material has many advantages of the high stiffness, high damping coefficient and low thermal expansion coefficient, the material for the motion platform can improve anti-vibration and thermal stability of the whole platform.
[7] Tim King, Michele Pozzi and Angelo Mannara, Power Engineering Journal, June (2000).
At present, in some industrial field, requirements have been put forward for nano scale micro-positioning table, such as semiconductor devices, optics, manufacturing of miniature and special materials processing, etc.
The precision ceramic type linear motor is selected to drive this system based on the comparison of performance, and the precision piezoelectric ceramic motor is adopted as the driving components, which has the characteristic of small size, low cost, high power output, fast response and high precision and no electromagnetic interference, its driving principle is adopted the piezoelectric materials.
Since the granite material has many advantages of the high stiffness, high damping coefficient and low thermal expansion coefficient, the material for the motion platform can improve anti-vibration and thermal stability of the whole platform.
[7] Tim King, Michele Pozzi and Angelo Mannara, Power Engineering Journal, June (2000).
Online since: September 2013
Authors: Qun Liu, Xiao Dong Song, Xiang Wang
Bauer Erich[10] has conducted triaxial creep test to study on dry and saturated granite rockfill materials.
References [1] HUANG Ming, LIU Xinrong and DENG Tao.Study on the creep properties of T2b2 siltite in terms of the damage law induced by water [J].Journal of Fuzhou University (Natural Science Edition).Vol.40 No.3 (2012):399-405(In Chinese) [2] HU Hua:Experimental research on factors influencing characteristics of rheological parameters of soft soil[J].Rock and Soil Mechanics.Vol.29 Supp.(2008):507-510(In Chinese) [3] CHEN Xiaoping, ZHOU Qiujuan, ZHU Honghu, etal: Research on creep and consolidation characteristics of soft soil [J].
Engrg.Vol.190 (2001):1985-2016 [7] Reiko Kuwano and Richard J.Jardine: On measuring creep behavior in granular materials through triaxial testing [J].Can.Geotech.J.Vol.39 (2002):1061-1074 [8] Li J Z, Peng F L, Xu L S, etal: Viscous properties of clay with different water content[C]//Proceedings of Sessions of GeoShanghai.Shanghai, 2006, 194:55-61 [9] Huang X L,Liu J J,Yang C H,etal:Experimental investigation of Daqing Oilfield mudstone’s creep characteristics under different water contents[J].Cent South Univ Technol,2008,15(S1): 471-474 [10] Erich B.Modeling rheological properties of coarse grained materials[C]//Art of Foundation Engineering Practice Congress.
References [1] HUANG Ming, LIU Xinrong and DENG Tao.Study on the creep properties of T2b2 siltite in terms of the damage law induced by water [J].Journal of Fuzhou University (Natural Science Edition).Vol.40 No.3 (2012):399-405(In Chinese) [2] HU Hua:Experimental research on factors influencing characteristics of rheological parameters of soft soil[J].Rock and Soil Mechanics.Vol.29 Supp.(2008):507-510(In Chinese) [3] CHEN Xiaoping, ZHOU Qiujuan, ZHU Honghu, etal: Research on creep and consolidation characteristics of soft soil [J].
Engrg.Vol.190 (2001):1985-2016 [7] Reiko Kuwano and Richard J.Jardine: On measuring creep behavior in granular materials through triaxial testing [J].Can.Geotech.J.Vol.39 (2002):1061-1074 [8] Li J Z, Peng F L, Xu L S, etal: Viscous properties of clay with different water content[C]//Proceedings of Sessions of GeoShanghai.Shanghai, 2006, 194:55-61 [9] Huang X L,Liu J J,Yang C H,etal:Experimental investigation of Daqing Oilfield mudstone’s creep characteristics under different water contents[J].Cent South Univ Technol,2008,15(S1): 471-474 [10] Erich B.Modeling rheological properties of coarse grained materials[C]//Art of Foundation Engineering Practice Congress.
Online since: September 2014
Authors: Yi Ma, Yuan Tang, Wei Chen, Jun Fu, Wen Hua Yuan, Zhi Guo Zhu
Compression Test based on Piston Material
175-piston material is aluminum-silicon alloy, with the piston diameter as 75mm and height as 70mm.
This compression test is performed by microprocessor control universal material testing machine on the basis of the 175-piston.
According to the aforementioned experimental result we can arrive at the conclusion that the corresponding strains of the piston aluminum-alloy material are respectively 0.00091 and 0.0029 when the stresses reach 62Mpa and 180Mpa.
Acknowledgements This project are supported by the Postgraduate Innovative Research Project of Shaoyang University (ID: CX2013SY016), the Innovation Platform Open Foundation in Higher Educational Institutions of Hunan Province(ID:09K104), and the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province.
[2]Tao Li, Zhengxing Zuo, Ridong Liao: Journal of Mechanical Engineering, Vol. 6(2009), p 304-308.In Chinese
This compression test is performed by microprocessor control universal material testing machine on the basis of the 175-piston.
According to the aforementioned experimental result we can arrive at the conclusion that the corresponding strains of the piston aluminum-alloy material are respectively 0.00091 and 0.0029 when the stresses reach 62Mpa and 180Mpa.
Acknowledgements This project are supported by the Postgraduate Innovative Research Project of Shaoyang University (ID: CX2013SY016), the Innovation Platform Open Foundation in Higher Educational Institutions of Hunan Province(ID:09K104), and the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province.
[2]Tao Li, Zhengxing Zuo, Ridong Liao: Journal of Mechanical Engineering, Vol. 6(2009), p 304-308.In Chinese