کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
814553 1469221 2016 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Effect of Carbon Content on Morphology, Size and Phase of Submicron Tungsten Carbide Powders by Salt-assisted Combustion Synthesis
ترجمه فارسی عنوان
اثر محتوای کربن بر روی مورفولوژی، اندازه و فاز پودرهای کاربید تنگستن زیرمیکرون توسط سنتز احتراقی به کمک نمک
کلمات کلیدی
محتوای کربن؛ سنتز احتراقی به کمک نمک ؛ پودر کاربید تنگستن؛ مورفولوژی؛ فاز
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک مواد
چکیده انگلیسی

The diluent NaCl was introduced into the WO3-Mg-C-Na2CO3 system to prepare submicron tungsten carbide (WC) powders via salt-assisted combustion synthesis. The products were analyzed by SEM, EDS and XRD, and the effects of C content on morphology, average particle size and phase composition of the products were studied. Results show that on basis of the m = 0.125 (the number of moles of Na2CO3), when the number of moles of carbon in raw material increases from l =2 to 2.25 and 2.5, before leaching, the product is made up of a small number of large size particles and a large number of small size particles; after leaching, samples are composed of aggregates of submicron particles, and the sintering phenomenon between particles is very weak, indicating low degree of aggregation. Particle size distribution of leached product almost falls into the normal distribution, and the particle sizes range from 200 nm to 350 nm. Under the condition of l=2.25, a main target product is WC, and the content of by-products W2C is extremely few. That is, k = 2.0 (the number of moles of NaCl), m = 0.125, and l =2.25 are the process conditions for single-phase WC synthesis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rare Metal Materials and Engineering - Volume 45, Issue 4, April 2016, Pages 853–857
نویسندگان
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