کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474472 991089 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture toughness of zirconia from a shallow notch produced by ultra-short pulsed laser ablation
ترجمه فارسی عنوان
چقرمگی شکستگی زیرکونیا از یک قطعه کم عمق تولید شده توسط لیزر پالس فوق العاده کوتاه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

Fracture toughness of submicron grain size tetragonal zirconia polycrystals doped with 3 mol% yttria (3Y-TZP) is measured by the single edge V-notch beam (SEVNB) method from a shallow sharp notch produced by ultra-short pulsed femtolaser ablation (UPLA) on the surface of a bending bar. It is shown that the radius of the notch tip achieved is in the submicron range and the damaged volume in front of the notch tip is characterized by using focus ion beam milling and scanning electron microscopy. It consists of a narrow fully microcracked region less than ∼4 μm wide and ∼15 μm deep in front of the notch. If the extension of this region and the length of the notch are used in the determination of the fracture toughness (KIc) in the four bending test, the values obtained for submicron grain size 3Y-TZP are in agreement those obtained by using very sharp cracks. It is concluded that the SEVNB testing method with a sharp notch induced by UPLA may be used for KIc testing of submicron grain size ceramics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 34, Issue 15, December 2014, Pages 3865–3870
نویسندگان
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