کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8041572 | 1518687 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of the irradiation-induced phase transition in the monoclinic polymorph of zirconia
ترجمه فارسی عنوان
خصوصیات انتقال فاز ناشی از اشعه در پلی مورف منوکلینیک زیرکونیا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
چکیده انگلیسی
Two groups of pure zirconia (ZrO2) specimens with the monoclinic polymorph and distinct nanopowder size ranges of approximately 20-30 nm and 30-60 nm were irradiated separately at room temperature with 100 keV H+ and 3 MeV Fe2+ ions to various fluences. Following TEM observations and XRD analyses, the irradiation with 100 keV protons to a fluence of over 3 Ã 1015 ions/cm2 was demonstrated to induce transformation from monoclinic (m) to tetragonal (t) phases in the specimen with the size range of approximately 20-30 nm due to the energy crossover that facilitates the m â t transformation. However, the transformation did not occur in the irradiated specimen with the other size range even though the fluence of protons was up to 1 Ã 1017 ions/cm2. Furthermore, although irradiation with 3 MeV Fe2+ ions brought about low electronic energy loss, the m â t transformation can be induced under the low fluence of 1 Ã 1014 ions/cm2 because a high level of damage defects (oxygen vacancies) may promote the m â t transformation. Consequently, the largest crystallite size of t-ZrO2 induced by the proton irradiation is approximately 29 nm, as a result of the metastable critical size effect of t-phase zirconia at room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 332, 1 August 2014, Pages 293-297
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 332, 1 August 2014, Pages 293-297
نویسندگان
R.T. Huang, Y.H. Shen, R.H. Huang, J.Y. Hsu, H. Niu, Y.C. Yu,