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Online since: March 2013
Authors: Xuan Hui Qu, Lin Liu, Xin Lei Ni, Hai Qin Yin, Yu Chen
Investigation of Deibinding and Sintering of 3Y-ZrO2 Gear
Fabricated by Micro Powder Injection Molding
Lin Liu1,a, Yu Chen1,b, Xinlei Ni2,c, haiqin Yin3,d and Xuanhui Qu3,e
1Department of Materials Science and Engineering,China University of Mining and Technology(Beijing), Beijing 100083, China
2Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials, Beijing 100095, China
3Institute of Particulate and Powder Metallurgy, School of Material Science and Technology, University of Science and Technology Beijing, Bejing 100083, China
aliulin@cumtb.edu.cn, b807437915@qq.com, cnxl03105209@163.com, dhqyin@mater.ustb.edu.cn, equxh@mater.ustb.edu.cn
Keywords: 3Y-ZrO2 gear,μPIM, Solvent debinding, Thermal debinding, Sintering.
Economic success of micro-systems technology requires cost-effective fabrication in large series as well as a great diversity of materials-processing technologies.
However, the production cost is very high in most cases, and the materials available are also limited.
Experiment Experimental materials.
Wang, The debinding process of wax-base binder in PIM,Materials, Science and Engineering of Powder Metallurgy. 16 (2011) 150-154
Economic success of micro-systems technology requires cost-effective fabrication in large series as well as a great diversity of materials-processing technologies.
However, the production cost is very high in most cases, and the materials available are also limited.
Experiment Experimental materials.
Wang, The debinding process of wax-base binder in PIM,Materials, Science and Engineering of Powder Metallurgy. 16 (2011) 150-154
Online since: July 2015
Authors: Nadezhda A. Skulkina, Oleg A. Ivanov, Elena A. Stepanova, Irina O. Pavlova
It is shown that the heat treatment in the air contributes to retrieve the status of a material with lower specific magnetic losses.
Acknowledgments The research was supported in part by the Ministry of Education and Science (UrFU, State contract № 2582) References [1] M.
Magnetic properties of FeSiB thin films displaying stripe domains, Journal of Magnetism and Magnetic Materials 321 (2009) 806–809
Gubernatorov, Combined thermomagnetic and laser treatments of anisotropic electrical materials, The Physics of Metals and Metallography, 111 (2011) 464-470
Acknowledgments The research was supported in part by the Ministry of Education and Science (UrFU, State contract № 2582) References [1] M.
Magnetic properties of FeSiB thin films displaying stripe domains, Journal of Magnetism and Magnetic Materials 321 (2009) 806–809
Gubernatorov, Combined thermomagnetic and laser treatments of anisotropic electrical materials, The Physics of Metals and Metallography, 111 (2011) 464-470
Online since: March 2012
Authors: Mahmoud Nili Ahmadabadi, Mihai Stoica, Amir Seifoddini, Saeed Heshmati-Manesh, Uta Kuehn, Jürgen Eckert
The effect of microstructural changes induced by annealing on mechanical properties of FeCoCrMoCBY bulk glassy alloy
Amir Seifoddini1,2,a, Mahmoud Nili-Ahmadabadi1,b,
Saeed Heshmati-Manesh1,c, Mihai Stoica2,d, Uta Kuehn2, Jürgen Eckert2,3
1 School of Metallurgy and Materials Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
2 IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
3 Institute of Materials Science, TU Dresden, D-01062 Dresden, Germany
aseifoddini@ut.ac.ir, b nili@ut.ac.ir, csheshmat@ut.ac.ir, dM.Stoica@ifw-dresden.de
Keywords: Metallic glasses; Mechanical properties; Annealing, Nanocrystal.
However, all these materials are extremely brittle in tension, have poor toughness and are brittle or quasi-brittle in compression [3].
Liu: Journal of Alloys and Compounds Vol. 463 (2008), p. 246 [11] F.X.
Fahlman: Materials Chemistry (Springer, 2007)
Xie: Materials Science and Engineering A Vol. 407 (2005), p. 161 [16] N.
However, all these materials are extremely brittle in tension, have poor toughness and are brittle or quasi-brittle in compression [3].
Liu: Journal of Alloys and Compounds Vol. 463 (2008), p. 246 [11] F.X.
Fahlman: Materials Chemistry (Springer, 2007)
Xie: Materials Science and Engineering A Vol. 407 (2005), p. 161 [16] N.
Online since: October 2007
Authors: Chen Rong, Hong Hua Wang, Di Zhang
Materials and Experimental Procedure
A new titanium metal of Ti-Nb-Ta-Zr-O alloy was produced.
Acknowledgments The authors are grateful for financial support provided by National Nature Science Foundation of China under Grant No: 50671063.
Chen, etal, "Multifunctional alloys obtained via a dislocation free plastic deformation mechanism", Science vol300, No. 5618, pp464-467, 2003 [2] M.
Materials Processing Technology, Vol. 117, 2001, PP318-323
Luetjering, Thermo-mechanical processing of high strength β-titanium alloys and effects on microstructure and properties, Journal of Materials Processing Technology 117(2001)311-317 [11] Materials properties handbooks: Titanium alloys, editors by Rodney Boyer, Gerhard Welsh and E.W.Collings, ASM international, The materials information society, Materials park, OH44073-0002
Acknowledgments The authors are grateful for financial support provided by National Nature Science Foundation of China under Grant No: 50671063.
Chen, etal, "Multifunctional alloys obtained via a dislocation free plastic deformation mechanism", Science vol300, No. 5618, pp464-467, 2003 [2] M.
Materials Processing Technology, Vol. 117, 2001, PP318-323
Luetjering, Thermo-mechanical processing of high strength β-titanium alloys and effects on microstructure and properties, Journal of Materials Processing Technology 117(2001)311-317 [11] Materials properties handbooks: Titanium alloys, editors by Rodney Boyer, Gerhard Welsh and E.W.Collings, ASM international, The materials information society, Materials park, OH44073-0002
Online since: March 2014
Authors: Alok Sharma, Ananthanarayanan Rajeshkannan
Introduction
Materials’ processing through classical powder metallurgy (P/M) begins with the compaction of metal or alloy powders by applying uniaxial or biaxial or triaxial pressure followed by sintering.
Corrosion resistance of Al-based materials is important especially for automotive and aircraft applications where the parts are prone to corrosive media [5].
The effective stress represents the bulk material property where the material exposed to this stress in triaxial condition.
German, Powder Metallurgy of Science, (MPFI, New Jersey, 1994)
Hayajneh: Journal of Minerals & Materials Characterization & Engineering Vol. 11(4) (2012),p. 435
Corrosion resistance of Al-based materials is important especially for automotive and aircraft applications where the parts are prone to corrosive media [5].
The effective stress represents the bulk material property where the material exposed to this stress in triaxial condition.
German, Powder Metallurgy of Science, (MPFI, New Jersey, 1994)
Hayajneh: Journal of Minerals & Materials Characterization & Engineering Vol. 11(4) (2012),p. 435
Online since: June 2014
Authors: Qing Zhang, Yuan Tao Sun, Xian Rong Qin, Ling Dong Zhang, Qian Ying Zhao
To make full use of the bearing capacity of materials and reduce the planetary reducers’ weight or make cost, researchers and makers gradually begin to adopt sing-arm planetary carrier.
The materials of planet wheel axle are all set to 42CrMo, and body of planetary carrier 42CrNi1Mo.
Yield strength and tensile strength of these two materials are all 930 [MPa] and 1080 [MPa], elastic modulus 2.1e5 [N/m2], and Poisson’s ratio 0.3.
Acknowledgements This research was supported by the National Natural Science Foundation of China (Project: 51205292) and The science and Technology Committee of Qingpu District (Project: 20130103).
Journal of Yangtze University (Nat Sci Edit).
The materials of planet wheel axle are all set to 42CrMo, and body of planetary carrier 42CrNi1Mo.
Yield strength and tensile strength of these two materials are all 930 [MPa] and 1080 [MPa], elastic modulus 2.1e5 [N/m2], and Poisson’s ratio 0.3.
Acknowledgements This research was supported by the National Natural Science Foundation of China (Project: 51205292) and The science and Technology Committee of Qingpu District (Project: 20130103).
Journal of Yangtze University (Nat Sci Edit).
Online since: November 2012
Authors: Priyanka Parmar, Rakesh Bajpai, Pragyesh Agrawal
Introduction
Conducting polymers have increasing scientific and technological interest in the synthesis of a broad variety of promising new materials due to their unique electrical, optical and optoelectrical properties as well as the ease of preparation and environmental stability[1,2].
Some of these modifications involve preparing hybrid materials in which organic materials and inorganic oxides or salts of different metals, viz. montomorillonite (MMT) clay combine in some special fashion with the conducting polymers to give rise to the composites.
The X-ray diffraction spectra demonstrate the intercalation of conducting PPy materials between the MMT clay layers and support the formation of PPy/MMT clay composites.
Choudhary, Studies on an ionically conducting polymer nanocomposite, Journal of Power Sources 159 (2006) 272
Chehimi, Montmorillonite/ polypyrrole nanocomposites: The effect of organic modification of clay on the chemical and electrical properties, Materials Science and Engineering C 26 (2006) 306
Some of these modifications involve preparing hybrid materials in which organic materials and inorganic oxides or salts of different metals, viz. montomorillonite (MMT) clay combine in some special fashion with the conducting polymers to give rise to the composites.
The X-ray diffraction spectra demonstrate the intercalation of conducting PPy materials between the MMT clay layers and support the formation of PPy/MMT clay composites.
Choudhary, Studies on an ionically conducting polymer nanocomposite, Journal of Power Sources 159 (2006) 272
Chehimi, Montmorillonite/ polypyrrole nanocomposites: The effect of organic modification of clay on the chemical and electrical properties, Materials Science and Engineering C 26 (2006) 306
Online since: August 2013
Authors: Ting Yao, Qian Tian, Shou Zhi Zhang, Fei Guo, Yu Jiang Wang
Field Monitoring and Analysis of Reinforcement Concrete Slab
Ting Yao1,a, Qian Tian1, Shouzhi Zhang1, Fei Guo1, Yujiang Wang1
1 State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Academy of Building Science, Subote R&D centre, 59 Wanan Road(W), Nanjing, China.
Design calls for a one-time continuous casting, without leaving any construction joints. 2.2 Materials Concrete strength grade of C30, the impermeability grade of S6 in the project monitored are used, while P.O.42.5R cement is adopted.
According to actual type of structure, properties of raw material and trial mixture in the lab, concrete are prepared with mix proportions shown in Table 1, whose slump is close to 130 mm.
Acknowledgements This work was financially supported by “12th Five-Year" National Science and Technology Support Program Funded Projects of China (Grant No. 2011BAE27B01-2) and National Science Fund for Distinguished Young Scholars of China (Grant No. 51225801).
Journal of hydraulic engineering.
Design calls for a one-time continuous casting, without leaving any construction joints. 2.2 Materials Concrete strength grade of C30, the impermeability grade of S6 in the project monitored are used, while P.O.42.5R cement is adopted.
According to actual type of structure, properties of raw material and trial mixture in the lab, concrete are prepared with mix proportions shown in Table 1, whose slump is close to 130 mm.
Acknowledgements This work was financially supported by “12th Five-Year" National Science and Technology Support Program Funded Projects of China (Grant No. 2011BAE27B01-2) and National Science Fund for Distinguished Young Scholars of China (Grant No. 51225801).
Journal of hydraulic engineering.
Online since: December 2010
Authors: Hai Bo Jiang, Ling Ming Yang, Ai De He
Fig.2 The finite element calculation model (half of bridge)
Calculation load and material parameters.
Table 1 The main structural material parameters Materials Elastic modulus Design tensile strength [MPa] Design compressive strength [MPa] C35 3.15×104 1.52 16.1 HRB335 2.0×105 280 280 Calculation results and analysis.
Acknowledgements The contents presented in this paper are supported by the Science and Technique Fund of Highway Bureau of Guangdong Province (2004005), the Scientific and Technical Committee of Guangzhou City (2008J1-C201), and the Science and Technique Fund of Highway Bureau of Guangzhou City (2008-3).
China Railway Science, p.44~49, 2004, In Chinese
Journal of Rock Mechanics and Engineering, p.2795~2801, 2005, In Chinese
Table 1 The main structural material parameters Materials Elastic modulus Design tensile strength [MPa] Design compressive strength [MPa] C35 3.15×104 1.52 16.1 HRB335 2.0×105 280 280 Calculation results and analysis.
Acknowledgements The contents presented in this paper are supported by the Science and Technique Fund of Highway Bureau of Guangdong Province (2004005), the Scientific and Technical Committee of Guangzhou City (2008J1-C201), and the Science and Technique Fund of Highway Bureau of Guangzhou City (2008-3).
China Railway Science, p.44~49, 2004, In Chinese
Journal of Rock Mechanics and Engineering, p.2795~2801, 2005, In Chinese
Online since: September 2011
Authors: Zhi Gang Lan, Bao Rong Hou, Xiu Tong Wang
BEM Numerical Modeling and Experimental Verification of Cathodic Protection for Offshore Structures
Zhigang Lan 1,2,3,a, Baorong Hou1,b, Xiutong Wang1,c
1Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2CNOOC Energy Technology & Service Limited, Beijing Branch, Beijing 100027, China;
3Graduate University of Chinese Academy of Sciences, Beijing 100049, China
alanzhg@cnooc.com.cn, b corresponding author, baoronghou@qdio.ac.cn, cwangxiutong@sina.com
Key Words: Boundary Element Method; Cathodic Protection Modeling; Offshore Jacket; Potential Distribution; Experimental Verification
Abstract.
With the development of computer science and electrochemical theory for decades, computer modelling of CP systems using numerical caculation has been showing a potential and promising alternative for CP design and evaluation [1-9].
Mufti, “ A survey of Computational Effects in the Field of Corrosion Engineering”, Journal of International Numerical Methods in Engineering.
Mehdizadeh, “Advances in offshore cathodic protection modeling using the boundary element method”, Materials Performance, Feb., 1987, pp.23-28
Niku, “Computer Modeling of Corrosion using the Boundary Element Method”, ASTM STP 1154, pp. 248-264 (1992) American Society of Testing and Materials, Philadelphia, 1992 [17] Jimmy X.
With the development of computer science and electrochemical theory for decades, computer modelling of CP systems using numerical caculation has been showing a potential and promising alternative for CP design and evaluation [1-9].
Mufti, “ A survey of Computational Effects in the Field of Corrosion Engineering”, Journal of International Numerical Methods in Engineering.
Mehdizadeh, “Advances in offshore cathodic protection modeling using the boundary element method”, Materials Performance, Feb., 1987, pp.23-28
Niku, “Computer Modeling of Corrosion using the Boundary Element Method”, ASTM STP 1154, pp. 248-264 (1992) American Society of Testing and Materials, Philadelphia, 1992 [17] Jimmy X.