کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990245 | 1516127 | 2018 | 47 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-isothermal oxide bond phase formation kinetics of SiC powder coated with yttrium aluminum garnet (YAG) sol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
SiC powders (d50â¯=â¯6.25â¯Î¼m) were coated with YAG by co-precipitation method and the coated powders were characterized by surface area, surface potential measurement, FTIR spectroscopy, XRD and thermal analysis. Non-isothermal kinetic data of two exothermic peaks in the temperature range 1200-1450â¯Â°C were evaluated by isoconversional methods using Netzsch Thermokinetics software module. The best fitting was obtained with second order reaction (F2) model for the peak I (1207-1359â¯Â°C) and Avrami-Erofeev (An) nucleation model for the peak-II (1324-1450â¯Â°C). The activation energy was determined as 605.57â¯kJ/mol and 1041â¯kJ/mol for peaks I and II respectively. Oxide bonded porous SiC ceramics fabricated at 1450â¯Â°C using YAG coated SiC powders exhibited flexural strength of â¼26.1â¯MPaâ¯at porosity level of â¼38.6â¯vol %. The corrosion results of ceramic sample after 10 days in strong acid solution revealed 6.5â¯wt % mass loss and 80% reduction of flexural strength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 302-314
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 302-314
نویسندگان
Sanchita Baitalik, Atiar Rahaman Molla, Nijhuma Kayal,