Propagation of gasless reactions in solids—II. Experimental study of exothermic intermetallic reaction rates
Propagation of gasless reactions in solids—II. Experimental study of exothermic intermetallic reaction rates
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固体中无气反应的传播——放热金属间反应速率的实验研究
DOI：
10.1016/0010-2180(73)90010-2
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发表时间：
1973
影响因子：
4.4
通讯作者：
R. Holsinger
中科院分区：
文献类型：
--
作者：
A. P. Hardt;R. Holsinger
对几种放热金属间反应的反应特性进行了实验研究。人们发现，硼和碳与钛和锆的混合物在室温下是自蔓延的，但铝化物混合物和其他类型的金属间反应混合物仅在高温下反应，或者必须具有在引发自持反应之前降低其热导率的添加剂。利用高温测定法和金相学研究了反应机理。结果表明，绝热反应温度必须超过合金的熔点，以确保自蔓延反应，并且点火温度可以低于任一成分的熔点。报告了反应混合物的线性反应速率和热传输特性。放热金属间反应构成一种特殊类型的无气反应，由于其相对化学惰性，可以在烟火和军械装置中得到应用。
The reaction characteristics of several exothermic intermetallic reactions were studied experimentally. The boron and carbon mixtures with titanium and zirconium were found to be self-propagating at room temperature but aluminide mixtures and other types of intermetallic reaction mixtures react only at elevated temperatures or must have additives which reduce their thermal conductivities before self-sustaining reactions can be initiated. The reaction mechanism was studied using pyrometry and metallography. It was shown that the adiabatic reaction temperature must exceed the melting point of the alloy in order to insure a self-propagating reaction, and that the ignition temperature may be below the melting point of either constituent. Linear reactions rates and thermal transport properties of the reaction mixtures are reported. Exothermic intermetallic reactions constitute a special type of gasless reaction which, owing to their comparative chemical inertness, may find application in pyrotechnic and ordnance devices.