کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455728 1514648 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation into the crack propagation in multiphase tantalum carbide ceramics
ترجمه فارسی عنوان
بررسی تجربی در مورد انتشار ترک در سرامیک کاربید تانتالیوم چند مرحلهای
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی

Tantalum carbide ceramics with high volume fractions of the ζ-Ta4C3 phase have been shown to exhibit high fracture strength and toughness as compared to those in absence of this phase. In this work, we investigated how microcracks propagated in this these high toughness ceramics using Knoop and Vickers microindentation. The Knoop indentations demonstrated that cracking preferentially occurred parallel to the lath structure in ζ-Ta4C3; however shorter cracks did form between the laths when a sufficient driving force was present. The resulting crack path was tortuous providing direct evidence for toughening through crack deflection; however, the microscale nature of the work cannot rule out crack bridging as a toughening mechanism as well. Plasticity is also observed under the indents, but is likely a result of the high confining pressures that occurred during indentation allowing for plastic flow.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 695, 17 May 2017, Pages 315-321
نویسندگان
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