کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476272 991149 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication of transparent LaAlO3/t-ZrO2 nanoceramics through controlled amorphous crystallization
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Fabrication of transparent LaAlO3/t-ZrO2 nanoceramics through controlled amorphous crystallization
چکیده انگلیسی

Transparent nanoceramics are attracting more and more interests recently, while it is practically difficult to prepare by conventional sintering process because of undesirable grain growth. In this study a new method of amorphous sintering followed by controlled crystallization (ASCC) was developed, and transparent LaAlO3/t-ZrO2 nanoceramics were prepared as examples. Glass powders from Al2O3–La2O3–ZrO2 (ALZ) were synthesized, sintered, and then converted to nanoceramics by post-heat-treatment. The processes of hot pressing and controlled crystallization were investigated in detail. The heat-treatment performed at 1200 °C for 2 h produced a transparent LaAlO3/t-ZrO2 nanoceramic with an average grain size of 40 nm. Due to the nanoscale microstructure, the composite showed a transparency up to 55% at 800 nm (1 mm thick), Vickers hardness of 19.05 GPa, and fracture toughness of 2.64 MPa m1/2, respectively. It is expected to be a promising candidate for window materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 31, Issue 9, August 2011, Pages 1603–1609
نویسندگان
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