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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Thermal investigation of fabricating porous NiTiSMA by SHS
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Thermal investigation of fabricating porous NiTiSMA by SHS

机译：通过SHS制备多孔NiTiSMA的热研究

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摘要

In this paper, the porous NiTi shape memory alloy (SMA) fabricated by self-propagating high-temperature synthesis (SHS) has been investigated experimentally and numerically. The mathematical models about the ignition and the sintering were constructed to investigate the effect of the preheating temperature and the coil temperature on the combustion. The results showed that the temperature difference between the ignition face and the bottom face was large due to low heat transfer conductivity. The ignition time would increase with the decrease of the coil temperature and the preheating temperature. The temperatures for different locations showed a strong dependence on the combustion time for lower preheating temperature, for the preheating temperature 1173 K, this mode of the combustion has transferred from SHS to thermal explosion. The transient partial molten phenomenon occurred during the process of combustion, which was more homogenous for preheating temperature 873 K. The mean velocity of the combustion wave was investigated systematically. An experiment was also carried out to investigate the ignition and SHS reaction for porous NiTi alloy in this paper. It was found that the results of experiment and numerical simulation were shown in good consistence. (c) 2008 Elsevier Inc. All rights reserved.
机译：本文对通过自蔓延高温合成（SHS）制备的多孔NiTi形状记忆合金（SMA）进行了实验和数值研究。建立了关于点火和烧结的数学模型，以研究预热温度和盘管温度对燃烧的影响。结果表明，由于传热系数低，点火面与底面之间的温差较大。点火时间将随着线圈温度和预热温度的降低而增加。对于较低的预热温度，不同位置的温度表现出对燃烧时间的强烈依赖性，对于预热温度1173 K，这种燃烧方式已从SHS转变为热爆炸。燃烧过程中发生了短暂的局部熔融现象，在预热温度873 K时更均匀。系统地研究了燃烧波的平均速度。本文还通过实验研究了多孔NiTi合金的着火和SHS反应。结果表明，实验结果和数值模拟结果吻合良好。 （c）2008 Elsevier Inc.保留所有权利。

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