کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1789579 | 1524386 | 2016 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Melt growth, structure and properties of (ZrO2)1âx(Sc2O3)x solid solution crystals (x=0.035â0.11)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Crystals of (ZrO2)1âx(Sc2O3)x solid solutions with x=0.035, 0.06, 0.09 and 0.11 have been grown for the first time using the directional crystallization technique. Analysis of the scandium distribution along the crystal showed that the composition of all specimens is homogeneous, and the Sc2O3 concentration is almost identical to its content in the charge. All specimens exhibit a little decline in the scandium concentration along the crystal, this indicating that the effective distribution coefficient Sc is slightly greater than 1. The structure of as-grown crystals has been studied as a function of the Sc2O3 stabilising oxide concentration by X-ray diffraction, transmission electron microscopy and Raman spectroscopy. Crystals containing 3.5Â mol% Sc2O3 are a mixture of the monoclinic and tetragonal phases, the crystals containing 6Â mol% Sc2O3 have a tetragonal structure, those with 9Â mol% Sc2O3 have the tetragonal phase with inclusions of the rhombohedral one and the specimens with 11Â mol% Sc2O3 represent the rhombohedral phase with inclusions of the cubic phase. The electrical conductivity was measured as a function of temperature by electrochemical impedance spectroscopy. The conductivity of the scandia stabilized crystals, in spite of their inhomogeneity, presence of stresses and low fracture toughness, is comparable with that of the yttria stabilized zirconia crystals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 443, 1 June 2016, Pages 54-61
Journal: Journal of Crystal Growth - Volume 443, 1 June 2016, Pages 54-61
نویسندگان
M.A. Borik, S.I. Bredikhin, A.V. Kulebyakin, I.E. Kuritsyna, E.E. Lomonova, F.O. Milovich, V.A. Myzina, V.V. Osiko, V.A. Panov, P.A. Ryabochkina, S.V. Seryakov, N.Yu. Tabachkova,