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Online since: March 2008
Authors: S.A. Golovin
Golovin Physics of Metals and Materials Science Department, Tula State University, Tula, Russia Abstract.
Since 1958 he works at Tula State University having thirty years experience as a Head of the Physics of Metals and Materials Science Department and Head of Internal Friction Lab.
In 1960s the Department of Materials Science and Heat Treatment of Metals in the Tula Polytechnical Institute became another research center (Kristal M.A. - 1960-1972 and Golovin S.A
The problem of anelasticity in materials has widely reflected the geography of the USSR.
Journal of Technical Physics (Zhurnal tekhicheskoi fiziki) (in Russian).
Online since: September 2014
Authors: Qun Wang
The amount of recycling materials can be obtained on the basis of coefficient of material recycling (Table 4).
[3] China Building Materials Academy.
Green building materials.
Journal of tsinghua university (natural science edition), 2009, 49(9): 1433-1436
[D].WuHan:Huazhong University of Science and Technology, 2009.
Online since: October 2011
Authors: Pei Xi Ding, Li Ru Yin
Raw materials humidity is about 10%~15% before stirred.
[12] Xiaohua Yang et al. : NWE BUILDING MATERIALS.
[14] Qisheng Wu et al. : NWE BUILDING MATERIALS.
[15] Gengxin Chen, Jibo Liu: Housing Materials & Application.
[16] Huiqiang Xiang et al. : Journal of Liaoning Technical University.
Online since: January 2009
Authors: Quan Lin Niu, Chong Zhi Li
Effect of aggregate volume fraction on the charge passed of mortar and concrete Quan-Lin Niu 1,a Chong-Zhi Li 2,b 1 School of materials science and technology, Shandong University of Technology, Zibo Shandong 255049 2 Beijing university of civil engineering and architecture a mail: niuquanlin@tsinghua.org.cn b mail: lichongzhi@bucea.edu.cn Keywords: Charge passed; aggregate; differential expression of Ohm law;volume fraction Abstract: Charge passed of mortars with different aggregate volume fractions was tested according to ASTM C1202, and the differential expression of the Ohm law was introduced to explain the relationship between charge passed data and aggregate fractions.Cl- penetration depth of the corresponding mortars and concretes was measured to illustrate the influence of the aggregate volume fraction on their chloride permeability.
Experimental Materials.
[3] Geiker,m., Thaulow,n., and Anderson,p.j., assessment of rapid chloride permeability of concrete with and without mineral admixtures, proceedings, in: the fifth international conference on durability of building materials and components, 1990, pp45-55
Caldwell, Effect of supplementary cementing materials on the specific conductivity of pore solution and its implication on the rapid chloride permeability test results, ACI material journal,V.95,N.4,1998,389-394
[8] Otsuki, N; Nagataki, S; and Nakashita, K., Evaluation of AgNO3 nitration solution spray method for measurement of chloride penetration into the hardened cementitious matrix materials, ACI Materials Journal, V. 89 (1992).
Online since: July 2014
Authors: Bruna da Costa Andrade, Marcelo Andrade Macedo
This improves the physical properties of these hexaferrites; therefore, they can be used in telecommunication applications, to increase the operational frequency of electronic devices, and as microwave absorbing materials.
Increasing the dopant concentration in W-type hexaferrites delivers better results in saturation magnetization, coercive field, and remnant magnetization; therefore, these materials can be used in high density and perpendicular magnetic recording medium applications [4].
The value of Mr/Ms obtained is 0.04, which suggests that the new hexaferrite has multiple magnetic domains; this is a behavior exhibited by ferrimagnetics materials (Mr/Ms < 0.5).
The coercivity of magnetic materials is directly correlated with magnetocrystalline anisotropy (Ha) according to the equation Ha = 2k1/Ms, (1) where k1 is the first anisotropy constant.
Pullar, Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics, Progress in Materials Science 57 (2012) 1191–1334
Online since: May 2005
Authors: T. Paul Chow, Kenneth A. Jones, Anant K. Agarwal, S. Balachandran, Skip Scozzie
To evaluate the ionization integrals IN and IP for the different materials described above the ionization coefficients need to be determined as a function of the electric field E.
List of impact ionization coeffecients for various poly-types of SiC Material AN(cm -1) AP(cm -1 ) BN(cm -1 ) BP(cm -1 ) 4H<0001> 4.08e5 1.63e7 1.67e7 1.67e7 4H<11-20> 2.1e7 2.96e7 1.7e7 1.6e7 6H<0001> 4.57e8 5.13e6 5.24e7 1.57e7 One dimensional zero carrier simulations were performed for both NPN and PNP BJTs for the three materials presented in Table 1.
Lindefelt , " Study of Avalanche Breakdown and Impact Ionization in 4H Silicon Carbide", Journal of Electronic Materials, vol 27, n 4, pp.335-341, 1998
Shenai, "Performance evaluation of high power wide bandgap semiconductor rectifiers," Journal of Applied Physics, vol 85, n 9, pp. 6889-6897, 1999
Arai, International Conference on Silicon Carbide and Related Materials, Part 2, pp. 673-676, 2003
Online since: November 2007
Authors: Rimma Lapovok, Barry C. Muddle, Dacian Tomus
Material and Experimental Procedures Material.
The HDH produced Ti-6Al-4V powder was supplied by Phelly Materials.
Patrick Martin and Lee Semiatin (AFRL/MLMD) References [1] Jim Williams, J. of Materials Processing Technology, 117 (2001), p. 370-373
Lapovok, Journal of Materials Science, 40:2, (2005), pp. 341-346
Anderson, Journal of Non-crystalline Solids 317 (203), 144-151
Online since: September 2008
Authors: Christofer Hierold, Christoph Stampfer, Thomas Helbling, Cosmin Roman, Lukas Durrer, Alain Jungen
They have also been identified as novel material with potential for technology entry in mainstream technologies.
Research on new functional materials for electronic devices for mainstream applications (e.g. logic, memory) and micro- and nanosystems for medical, life science, analysis and instrumentation, automotive and consumer applications will share a high communality on the near-term and long-term perspective.
Craighead, "Nanoelectromechanical Systems", Science, vol. 290, pp. 1532-1535, 2000
IEEE Sensors Journal, 6 (3), 613-627, 2006
Dai, Science 287(5453), 622-625, 2000
Online since: February 2011
Authors: Hong Yan, Zhi Min Huang
For the industrial application fields such as automobile industry and aviation industry, the creep is an important index to measure the good or bad property of a material at high temperature.
The second stage of creep curve is a fairly big proportion in the whole creep deformation process , which will mainly determine the creep life [4].Thus the decisive influence on creep properties of material is the creep rate and deformation at a steady creep stage.
Acknowledgement This research was supported jointly by grant # 50765005 form the National Natural Science Foundation of China, grant # 00008713 from Innovative Group of Science and Technology of College of Jiangxi Province and the Jiangxi Province Education Commission Foundation.
Wan: Chinese Journal of Computational Mechanics Vol. 20 (2003), p.743 [4] X.
Zhang: Materials Science Forum Vol. 561-565 (2007), p. 945 [6] H.
Online since: January 2013
Authors: Chun Ping Li, Chang Jie Liu, Li Zhang, Ge Gao
China 2 Changchun University of Science and Technology, Changchun, Jilin 130022, P.
Introduction ZnO has attracted considerable attention due to its most potential applications and the availability of ZnO nanostructured materials that characterized by excitonic properties are extremely interesting for electronics, optics and photonics devices[1-4].
Yan, et al., Room temperature ultraviolet nanowire nanolasers, Science, 292 (2001) 1897-1899
Teke, et al., A comprehensive review of ZnO materials and devices, 98 (2005) 041301-1-103
Zhang, Raman and excitonic photoluminescence characterizations of ZnO star-shaped nanocrystals, Journal of Luminescence 122–123 (2007) 415-417