کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5439259 1398194 2016 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Failure mechanisms of Al2O3 with different glass phase content at cryogenic temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Failure mechanisms of Al2O3 with different glass phase content at cryogenic temperatures
چکیده انگلیسی
The effects of glass phase and temperature on the mechanical properties of 99%, 92%, 85% and 75% Al2O3 are investigated. The in-situ XRD results revealed that the lattice constants of Al2O3 single crystals were reduced when temperature decreased from room temperature (RT) to 30 K. The results of mechanical properties were analyzed by Weibull equation. It can be concluded that for the samples containing same content of glass phase, the bending strength and fracture toughness increased as temperature decreased from RT to 77 K. While at the same test temperature, the mechanical properties degraded when the glass phase content increased. The statistical analysis of indentation crack propagation paths of 99% Al2O3 indicated that the proportion of transgranular fracture was increased at 77 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 16, December 2016, Pages 17997-18003
نویسندگان
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