Energetic Materials Based on W/PTFE/Al: Thermal and Shock-Wave Initiation of Exothermic Reactions
نویسندگان
چکیده
The parameters of combustion synthesis and shock-wave initiation reactive W/PTFE/Al compacts are investigated. Preliminary thermodynamic calculations showed the possibility system at high adiabatic temperatures (up to 2776 °C) a large proportion condensed products. effect Al content (5, 10, 20, 30 wt%) in on ignition development exothermic reactions was determined. Ignition rates were measured argon, air, rarefied air. A correlation between gas medium, rate, temperature found. shock with different examined. extent reaction all studied by X-ray diffraction. compositions 10 20 wt% highest completeness after initiation.
منابع مشابه
Initiation and Decomposition of Green Energetic Materials
Recently there has been increased interest in high nitrogen content “green” energetic materials which are designed to produce relatively non-toxic decomposition products as part of a push to decrease the environmental impact of energetic materials through all phases of their existence. With the use of a T-Jump/Time-of-Flight Mass Spectrometer (T-Jump/TOFMS) capable of high heating rates (up to ...
متن کاملShock wave and modeling study of the thermal decomposition reactions of pentafluoroethane and 2-H-heptafluoropropane.
The thermal decomposition reactions of CF3CF2H and CF3CFHCF3 have been studied in shock waves by monitoring the appearance of CF2 radicals. Temperatures in the range 1400-2000 K and Ar bath gas concentrations in the range (2-10) × 10(-5) mol cm(-3) were employed. It is shown that the reactions are initiated by C-C bond fission and not by HF elimination. Differing conclusions in the literature a...
متن کاملShear-Induced Exothermic Chemical Reactions
The structure of controlled high-strain-rate shear bands generated in Ti-Si reactive powders has been investigated by means of the radd symmetric collapse of a thick-walled cylinder. Shear localization developed at global strains of 0.2-0.4 and a strain rate of lo4 s-I. Within the shear bands, local shear strains were up to 100 9d local shear strain rates were lo7 s-'. Chemical reactions were i...
متن کاملdeveloping a pattern based on speech acts and language functions for developing materials for the course “ the study of islamic texts translation”
هدف پژوهش حاضر ارائه ی الگویی بر اساس کنش گفتار و کارکرد زبان برای تدوین مطالب درس "بررسی آثار ترجمه شده ی اسلامی" می باشد. در الگوی جدید، جهت تدوین مطالب بهتر و جذاب تر، بر خلاف کتاب-های موجود، از مدل های سطوح گفتارِ آستین (1962)، گروه بندی عملکردهای گفتارِ سرل (1976) و کارکرد زبانیِ هالیدی (1978) بهره جسته شده است. برای این منظور، 57 آیه ی شریفه، به صورت تصادفی از بخش-های مختلف قرآن انتخاب گردید...
15 صفحه اولThermal shock and thermal fatigue study of ceramic materials on a newly developed ascending thermal shock test equipment
A test equipment was designed to study thermal shock and thermal fatigue of ceramic materials subjected to fast heating (ascending). The equipment was designed to generate thermal stress in a test specimen by heating one surface of it by an oxy-hydrogen flame while cooling the opposite surface. The sample cracked when thermal stress exceeded its mechanical strength. The in situ crack formation ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Metals
سال: 2021
ISSN: ['2075-4701']
DOI: https://doi.org/10.3390/met11091355