کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898775 | 1510139 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Biaxial strength and slow crack growth in porous alumina with silica sintering aid
ترجمه فارسی عنوان
استحکام دوگانه و رشد ترک شکاف در آلومینای متخلخل با کمک پخت سلیاک
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کلمات کلیدی
آلومینا متخلخل استحکام دوگانه، چقرمگی شکستگی، رشد شکاف زیرکریتی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Biaxial strength, fracture toughness and subcritical crack growth are reported for coarse grained porous alumina ceramics. The materials were prepared with a varying amount of a silica sintering aid, which resulted in the formation of a glassy secondary phase at the grain boundaries. Crystalline mullite was additionally found in the material with the highest silica content. The biaxial strength, measured by Ball-on-Ring and Ball-on-3-Balls, was highest for the material without mullite at the grain boundaries, and the biaxial strength decreased with increasing porosity. The fracture toughness of the materials was in the range of 1.7-1.9 MPa m0.5. Measurements of subcritical crack growth by a modified lifetime method in air and aqueous environments demonstrated a higher crack growth rate in water and acid relative to in air. The effect of porosity and grain boundary phase were discussed in relation to subcritical crack growth and fracture mode in the coarse grained alumina ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 2, February 2018, Pages 665-670
Journal: Journal of the European Ceramic Society - Volume 38, Issue 2, February 2018, Pages 665-670
نویسندگان
Astrid Bakken, Susanne Wagner, Michael J. Hoffmann, Bernt Thorstensen, Mari-Ann Einarsrud, Tor Grande,