کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898604 | 1510139 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanical properties and grain orientation evolution of zirconium diboride-zirconium carbide ceramics
ترجمه فارسی عنوان
ویژگی های مکانیکی و جهت گیری دانه از سرامیک کاربید زیرورونیوم دی بورید و زیرکونیوم
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The effect of ZrC on the mechanical response of ZrB2 ceramics has been evaluated from room temperature to 2000 °C. Zirconium diboride ceramics containing 10 vol% ZrC had higher strengths at all temperatures compared to previous reports for nominally pure ZrB2. The addition of ZrC also increased fracture toughness from â¼3.5MPam for nominally pure ZrB2 to â¼4.3MPam due to residual thermal stresses. The toughness was comparable with ZrB2 up to 1600 °C, but increased to 4.6MPam at 1800 °C and 2000 °C. The increased toughness above 1600 °C was attributed to plasticity in the ZrC at elevated temperatures. Electron back-scattered diffraction analysis showed strong orientation of the ZrC grains along the [001] direction in the tensile region of specimens tested at 2000 °C, a phenomenon that has not been observed previously for fast fracture (crosshead displacement rate = 4.0 mm minâ1) in four point bending. It is believed that microstructural changes and plasticity at elevated temperature were the mechanisms behind the ultrafast reorientation of ZrC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 2, February 2018, Pages 391-402
Journal: Journal of the European Ceramic Society - Volume 38, Issue 2, February 2018, Pages 391-402
نویسندگان
A. D'Angio', J. Zou, J. Binner, Hai-Bin Ma, G.E. Hilmas, W.G. Fahrenholtz,