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This model assumes that the positron exists in one of only two states in the materials: the free or Bloch state and the defect-trapped state.
But in cast and 2024 alloy, there is a change in mean lifetime related to aging time; due to the formation of point defects (vacancies) upon deforming these materials.
Sampath et. al: Materials Science Forum, 217-222 (1996) 747
Seeger : Journal of Physics F, 3 (1973) 248
Hassan: Materials Science Forum, 445 (2004) 45

Peterson, M.A Fiori: Materials Science & Engineering.
Fiori: Materials Science & Engineering.
Fiori: Materials Science Forum Vols. 732-733 (2012), p. 1125
Silva: Materials Science & Engineering C Biomimetic Materials, Sensors and Systems Vol. 29 (2009), p. 647
Angioletto: Materials Science & Engineering.

Hamilton, Materials Science Forum, 243-245, p. 125-130, 1997. 5.
Materials Science, 12, p. 851-855, 1977. 8.
Ridley, Materials Science, 10, p. 182-188, 1976. 9.
Chen, Temperature effects on the localization and failure mode of Al 5083, Materials Science Forum, 37-359, 599-606, (2001). 10.
Chandra, Constitutive behavior of Superplastic materials, International Journal for nonlinear mechanics, 37, 461-484, (2002).

Introduction Currently with the continuous development of industry, environmental pollution problems are becoming increasingly serious, which led to the research of environmental purification materials has become one of the focus points in materials science [1-2].
Alternatively, the immobilizating TiO2 film on the surface of materials is a promising approach to tackle the problem.
Acknowledgements This work was supported by Natural Science Foundation of China (51461015).
Lee: Chemical Engineering Journal Vol. 228 (2013), p. 756-764
Wankhade: Materials Science in Semiconductor Processing Vol. 63 (2017), p. 18-24 [12] A.

Novel Cathodes Consisting of La3Ni2O7+δ Mixed with Ba0.5Sr0.5Co0.8Fe0.2O3-δ for Proton-Conductive Solid Oxide Fuel Cells (p-SOFCs) Hung-Ghun Ding1, Wei Sun2, Jing-Chie Lin1,2*, Sheng-Wei Lee1, Jason Shian-Ching Jang1, I-Ming Hung3, Kai-Ti Hsu1, Kan-Rong Lee1 1Institute of Materials Science & Engineering, National Central University, No. 300, Jhongda Rd., Jhongli District, Taoyuan City 32001, Taiwan 2Department of Mechanical Engineering, National Central University, No. 300, Jhongda Rd., Jhongli District, Taoyuan City 32001, Taiwan 3Department of Chemical Engineering & Materials Science, Yuan Ze University, 135 Yuan-Tung Road, Jhongli District, Taoyuan City 32003, Taiwan *jclincom@cc.ncu.edu.tw Keywords: Proton-Conductive Solid Oxide Fuel Cells, Novel Cathode, Combustion Process, Lanthanum Nickel Oxide, Barium Strontium Cobalt Ferrite Abstract.
BSCF became one of the most popular cathode materials for mid-temperature SOFC since Shao and Haile published a paper to claim a high power density (up to 1010 mW/cm2 at 600°C) resulted from an anode-support SOFC with Ba0.5Sr0.5Co0.8Fe0.2O3-δ [6] as the cathode.
Cheng, Investigation of structural and electrochemical properties of LaSrCo1− xSbxO4 (0≤ x≤ 0.20) as potential cathode materials in intermediate-temperature solid oxide fuel cells, Journal of Solid State Chemistry, 247 (2017) 24-30
Bharadwaj, Chemical compatibility study of BSCF cathode materials with proton-conducting BCY/BCZY/BZY electrolytes, Journal of Thermal Analysis and Calorimetry, (2019) 1-10
KUHARUANGRONG, Synthesis and Physical Properties of La3-xSrxNi2O7±δ Ruddlesden-Popper Phase, Journal of Metals, Materials and Minerals, 18 (2008) 77-82.

Verification of the Charpy Impact Test Capability to Determine the Constants of the Johnson-Cook Model STOPEL Michal Stopel1,a*, SKIBICKI Dariusz1,b 1Univeristy Of Science And Technology in Bydgoszcz, al.
Numerous studies show significant effect of strain rate on the increase in yield stress and material hardening [3,5].
Cook is one of the material models that allows the simulation to take into consideration the effect of strain rate action on material behaviour.
The commonly used method in the mentioned approach requires the knowledge of the values of material properties.
A distinct area, where the material maintains its elastic properties can be observed.

Applications in optoelectronics and photonics heavily rely on materials based on glycine.
Advance in materials Physics and Chemistry. 5(10) (2015) 399-407
Materials Today: Proceedings, 11 (2019) 944–951
Ramesh babu, Procedia Materials Science,5 (2014) 212–221
Jisha International Journal of Materials Physics 7, (2016) 1- 8 [22] Rajesh Krishnana, Mani Ayyanarb, Anandan Kasinathana, Praveen Kumar Materials Research. 21(2) (2018) 20170329

There are various reasons for this high value of Rs such as disorders of the organic materials, variety of junction formation in between organic materials and metals.
Materials and Sample Preparation The structure of PSF (3,7-diamino-5-phenylphenazinium chloride) is shown in Fig. 1(a).
Ali, S.IsmatShah, Enhanced performance of P3HT/ (PCBM:ZnO:TiO2) blend based hybrid organic solar cells, Materials Research Bulletin. 75 (2016) 35-40
Church, and Nidal Abu-Zahra*, Effect of ZnO nanoparticles on the power conversion efficiency of organic photovoltaic devices synthesized with CuO nanoparticles, AIMS Materials Science. 3 (2016) 927-937
Tripathi, A Comparative Study of Nanostructured TiO2, ZnO and Bilayer TiO2/ZnO Dye-Sensitized Solar Cells, Journal of Electronics Materials. 44 (2015) 1151- 1159

Journal of Materials Processing Technology, 169, no ,3, (2005) ,346-351
Maejo International Journal of Science and Technology, 4, n°, 2, (2010) ,347-359
Materials and Design, 31, (2010), 2488-2495
Materials Characterization, 58, (2007), 29-39
Journal of Materials Science & Technology,34, 4, (2018), 653-659

Test materials Cementitious materials The cementitious materials of experimental used the new developed cementitious materials which mainly component are iron slag powder, desulfurization ash, lime, and mirabilite.
Visible, Jinchuan unclassified tailings is a neutral material without cement activity, meet the requirements of the mine filling materials.
(In Chinese) Development and application of cementing filling materials [J].
Journal of Central South University (Science and Technology), 2013, 44(4): 1571−1577
Journal of Environmental Management, 2013 (115):5–13.