Crystallization and mechanical properties of solid solutions between bismuth and antimony chalcogenides

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• 作者：L. D. Ivanova ; L. I. Petrova ; Yu. V. Granatkina ; D. S. Nikulin…
• 关键词：solid solutions between bismuth and antimony chalcogenides ; melt solidification in liquid ; fractographs of fracture surfaces of samples ; mechanical properties
• 刊名：Inorganic Materials
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：52
• 期：3
• 页码：248-255
• 全文大小：1,628 KB
• 参考文献：1.Hicks, L.D. and Dresselhaus, M.S., Effect of quantum-well structure on thermoelectric figure of merit, Phys. Rev. B: Condens. Matter Mater. Phys., 1993, vol. 47, no. 19, pp. 12727–12731.CrossRef
  2.Hicks, L.D., Harman, T.C., Sun, X., and Dresselhaus, M.S., Experimental study of the effect of quantum-well structures on the thermoelectric figure of merit, Phys. Rev. B: Condens. Matter Mater. Phys., 1996, vol. 52, pp. 10493–10496.CrossRef
  3.Harman, T.C., Taylor, P.J., Spears, D.L., and Walsh, M.P., Thermoelectric quantum-dot superlattices with high ZT, J. Electron. Mater., 2000, vol. 29, no. 1, pp. L1–L2.CrossRef
  4.Vasilevskiy, D., Dawood, M.S., Masse, J.-P., Turenne, S., and Masut, R.A., Generation of nanosized particles during mechanical alloying and their evolution through the hot extrusion process in bismuth-telluride-based alloys, J. Electron. Mater., 2010, vol. 39, no. 9, pp. 1890–1896.CrossRef
  5.Bulat, L.P., Osvenskii, V.B., Parkhomenko, Yu.N., and Pshenai-Severin, D.A., Investigation of the possibilities for increasing the thermoelectric figure of merit of nanostructured materials based on Bi2Te3–Sb2Te3 solid solutions, Phys. Solid State, 2012, vol. 54, no. 11, pp. 2165–2173.CrossRef
  6.Ivanova, L.D., Petrova, L.I., Granatkina, Yu.V., et al., Thermoelectric and mechanical properties of the Bi0.5Sb1.5Te3 solid solution prepared by melt spinning, Inorg. Mater., 2013, vol. 49, no. 2, pp. 120–126.CrossRef
  7.Davis, V.L., UK Patent 2 050 437, 1981.
  8.Xinfeng Tang, Bo Song, and Cong Xiong, Cn. Patent 1594624, 2005.
  9.Lavrent’ev, M.G., Osvenskii, V.B., Pivovarov, G.I., et al., Mechanical properties of solid solutions between bismuth and antimony chalcogenides prepared by directional solidification and powder metallurgy, in Termoelektriki i ikh primenenie 2014 (Thermoelectrics and Their Applications 2014), St. Petersburg: Konstantinov Institute of Nuclear Physics, National Research Centre Kurchatov Institute, 2015, pp. 341–346.
  
• 作者单位：L. D. Ivanova (1)
  L. I. Petrova (1)
  Yu. V. Granatkina (1)
  D. S. Nikulin (2)
  O. A. Raikina (2)
  
  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia
  2. OOO Thermointech, proezd 4922 4/5, office 22, Zelenograd, Moscow, 124498, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Inorganic Chemistry
  Industrial Chemistry and Chemical Engineering
  Materials Science
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3172

文摘

Using scanning electron microscopy, we have studied how the conditions of preparation of granules of Sb₂Te₃–Bi₂Te₃ and Bi₂Te₃–Bi₂Se₃ solid solutions through melt solidification in a liquid influence their morphology, fractographs of fracture surfaces of samples prepared by hot-pressing the granules, and the contents of the major components in the samples. The granules are rounded (solidification in water and liquid nitrogen) or platelike (solidification in water under an excess pressure and in liquid-nitrogen-cooled ethanol) in shape. Fracture surfaces of hot-pressed samples prepared from granules comminuted in a ball mill have a uniform, fine microstructure, with faceted grains several microns in size. Characteristically, samples prepared from granules comminuted in a cutting mill have transgranular layered fractures, with layers up to hundreds of microns in thickness. The mechanical properties of the samples (ultimate strength and relative elongation) have been studied using compression tests at temperatures of 300 and 620 K. The samples experience brittle fracture. Their compression strength σ_c is 55 ± 12 MPa. With increasing temperature, σ_c varies only slightly, but at 620 K the samples become more plastic and their relative elongation ε_b increases by a factor of 2–4. The ultimate strength of hot-pressed samples prepared by uniaxial compression is 20% higher than that of samples prepared by biaxial compression.