کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
166880 457824 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-temperature combustion waves in low-energy K2TaF7–Si-additive systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Low-temperature combustion waves in low-energy K2TaF7–Si-additive systems
چکیده انگلیسی

This work presents the use of a thermocouple technique for measuring temperature profiles in a condensed K2TaF7–Si system blended with a small amount of Teflon [(C2F4)n] or potassium chlorate (KClO3). A base experiment is described in detail to demonstrate the ability of the system to react under a low-rate self-sustaining mode at ambient temperature. The ignition temperatures, temperature–time profiles, combustion parameters, and final products are presented with respect to the additive concentration. The combustion processes begin at 340 and 450 °C for the KClO3 and (C2F4)n-containing mixtures, respectively. The maximum temperatures of both KClO3 and (C2F4)n-containing mixtures range from 470 to 960 °C and the combustion self-propagates along the sample at a speed of 0.01–0.08 cm/s. The solid combustion products produced under the optimized conditions include fine powders of tantalum, tantalum carbide, and tantalum silicides. The chemical mechanism of the combustion process and reaction parameters responsible for low-speed wave propagation are presented and discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 160, Issue 11, November 2013, Pages 2631–2637
نویسندگان
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