Hardness and microstructural analysis of Bi1.6Pb0.4Sr2Ca2−xSmxCu3Oy polycrystalline superconductors
作者： U. Kölemen , O. Uzun , M. Yılmazlar , N. Güçlü , E. Yanmaz
DOI: 10.1016/J.JALLCOM.2005.09.023
关键词: Composite material 、 Superconductivity 、 Materials science 、 Vickers hardness test 、 Microstructure 、 Indentation hardness 、 Crystallite 、 Phase (matter) 、 Scanning electron microscope 、 Mineralogy 、 Indentation
摘要: Abstract Bi1.6Pb0.4Sr2Ca2−xSmxCu3Oy superconductors with nominal substitution parameters x = 0.0, 0.001, 0.005, and 0.1 were prepared by the conventional solid-state reaction powder compacting method. The effects of Sm on phase formation, microhardness surface microstructure samples investigated. Phase examination X-ray diffraction indicated that enhanced formation Bi-2212 phase. Morphological investigations scanning electron microscope revealed both number size voids sample surfaces decreased enrichment. This result was also supported density measurements samples. Additionally, indentation-induced Vickers testing results in applied load range 0.245–2.940 N presented. It shown values non-linearly increasing all cases. experimental analyzed using Kick's law, Hays–Kendall approach modified proportional specimen resistance (PSR) model. analyses law failed to explain observed variations. Besides, PSR model more suitable than estimate independent hardness BSCCO superconductor.
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sci-hub.se 参考文章(26)
J. B QUINN, G. D QUINN, Indentation brittleness of ceramics: a fresh approach Journal of Materials Science. ,vol. 32, pp. 4331- 4346 ,(1997) , 10.1023/A:1018671823059
K. Nanda Kishore, S. Satyavathi, M. Muralidhar, V. Hari Babu, O. Peña, Transport and magnetic properties of Sm-substituted BISCCO (2223) superconductors (Bi1.7Pb0.3Sr2Ca2−xSmxCu3Oy) Physica C-superconductivity and Its Applications. ,vol. 235, pp. 1519- 1520 ,(1994) , 10.1016/0921-4534(94)91984-4
Keshra Sangwal, Barbara Surowska, Study of indentation size effect and microhardness of SrLaAlO4 and SrLaGaO4 single crystals Materials Research Innovations. ,vol. 7, pp. 91- 104 ,(2003) , 10.1007/S10019-003-0234-6
U. Kölemen, S. Çelebi, Y. Yoshino, A. Öztürk, Mechanical properties of YBCO and YBCO+ZnO polycrystalline superconductors using Vickers hardness test at cryogenic temperatures Physica C: Superconductivity. ,vol. 406, pp. 20- 26 ,(2004) , 10.1016/J.PHYSC.2004.02.174
Orhan Uzun, Tuncay Karaaslan, Mustafa Keskin, Hardness evaluation of Al–12Si–0.5Sb melt–spun ribbons Journal of Alloys and Compounds. ,vol. 358, pp. 104- 111 ,(2003) , 10.1016/S0925-8388(03)00070-7
P Majewski, Phase diagram studies in the system Bi - Pb - Sr - Ca - Cu - O - Ag Superconductor Science and Technology. ,vol. 10, pp. 453- 467 ,(1997) , 10.1088/0953-2048/10/7/001
K.K Bamzai, P.N Kotru, B.M Wanklyn, Investigations on indentation induced hardness and fracture mechanism in flux grown DyAlO3 crystals Applied Surface Science. ,vol. 133, pp. 195- 204 ,(1998) , 10.1016/S0169-4332(98)00187-1
Orhan Uzun, Uğur Kölemen, Selahattin Çelebi, Nusret Güçlü, Modulus and hardness evaluation of polycrystalline superconductors by dynamic microindentation technique Journal of The European Ceramic Society. ,vol. 25, pp. 969- 977 ,(2005) , 10.1016/J.JEURCERAMSOC.2004.03.031
H. C. Ling, M. F. Yan, Microhardness measurements on dopant modified superconducting YBa2Cu3O7 ceramics Journal of Applied Physics. ,vol. 64, pp. 1307- 1311 ,(1988) , 10.1063/1.341851
SA Halim, SA Khawaldeh, SB Mohamed, H Azhan, None, Superconducting properties of Bi2−xPbxSr2Ca2Cu3Oy system derived via sol–gel and solid state routes Materials Chemistry and Physics. ,vol. 61, pp. 251- 259 ,(1999) , 10.1016/S0254-0584(99)00164-9