冲击温度、压力对Ti-Si活性粉体自蔓延反应的影响

为解决在冲击加载条件下，冲击温度和冲击压力对Ti-Si活性粉体发生自蔓延反应影响的问题.一方面，采用相同强度的平面加载方式对不同密实度样品进行冲击处理，另一方面，采用不同强度的柱面加载方式对相同密实度样品进行冲击处理，分别研究冲击温度和冲击压力对Ti-Si活性粉体发生自蔓延反应的影响.采用XRD和SEM进一步确定Ti-Si活性粉体发生自蔓延反应的情况.实验结果表明，在平面加载条件下，较低密实度样品会发生自蔓延反应，即冲击温度较高有利于反应完全进行；在柱面加载条件下，较高密实度样品会发生自蔓延反应，即冲击压力较高有利于反应完全进行. 

Impact of Temperature and Pressure on The Ti-Si Self-Propagating Reaction

The impact of temperature and pressure on the activity of Ti-Si powder''s self-propagating reaction under the condition of shock was investigated in this paper. On the one hand, the samples of different compactness were loaded by the same intensity plane shock to study the effect of temperature on self-propagating reaction. On the other hand, the samples of identical compactness were loaded by the different intensity cylindrical shock to study the effect of pressure on self-propagating reaction; XRD and SEM tests were used to further determine the degree of self-propagating reaction of Ti-Si reactive powder. Experimental results show that:under the condition of plane shock, the sample of low compactness starts self-propagating reaction entirely, in other words, higher shock temperature is beneficial to reaction; under the condition of cylindrical shock, the sample of higher compactness starts self-propagating reaction entirely, in other words, high shock pressure is beneficial to reaction.