کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1459011 989588 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of La2O3 on the microstructure and room temperature mechanical properties of t-ZrO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The effect of La2O3 on the microstructure and room temperature mechanical properties of t-ZrO2
چکیده انگلیسی
Structural and mechanical properties of La2O3 added (up to 5 wt%) t-ZrO2 compacts were examined with the aim of optimizing hardness and fracture toughness for room temperature applications. Structural examinations were performed using an X-ray diffractometer and a scanning electron microscope. Mechanical properties of the compacts were determined as modulus of elasticity, hardness and fracture toughness by conducting Vickers indentation tests under test loads of 0.5, 1 and 10 kg. Addition of 0.5 wt% La2O3 deteriorated the room temperature stability of t-ZrO2 by forming m-ZrO2 and coarse polygonal grains in the matrix. Higher concentrations (2 and 5 wt% La2O3) caused precipitation of La2Zr2O7 at the grain boundaries, which also accompanied by a reduction in hardness. Fracture toughness increased with increasing La2O3 content of the compact. Finally, an optimum combination between hardness and fracture toughness was obtained for the 0.5 wt% La2O3 containing compact.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 8, June 2016, Pages 9443-9447
نویسندگان
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