کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438417 1398184 2017 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of sub-micro sized high purity zirconium diboride powder through carbothermal and borothermal reduction method
ترجمه فارسی عنوان
سنتز پودر دی بورید زیرکونیم با خلوص بالا با میکرو اندازه گیری از طریق روش کاهش کربوترمال و بوروترمال
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Sub-micro sized zirconium diboride (ZrB2) powders were successfully prepared via the boro/carbothermal reduction method using zirconium oxide and boron carbide as the primary raw materials. The prepared mixtures were thermally reacted at 1250 °C for 1 h. The optimized composition range containing the lowest oxide and carbide impurity, which was 0.14% of oxygen and 0.3% of carbon contents, was determined using crystallographic and elemental analysis. The particle size was reduced from 5 µm to 245 nm by the addition of B4C as a reductant within a composition range that maintained the highest purity. The morphology changed from faceted to angular hexagonal bar-like with a simultaneous growth in particle size. Changes in the particle structure were a result of the existing liquid B2O3 phase during the reaction. The 245-nm particles contained 12.1% oxygen content and 16.2% oxygen content for the 5-μm particle in the circumstance in which limited oxides could be produced.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 8, 1 June 2017, Pages 5896-5900
نویسندگان
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