To study the thermal decomposition of Al/ZrH₂/PTFE with different Al particle size as well as mechanical strength and impact sensitivity under medium and low strain rates, molding-vacuum sintering was adopted to prepare four groups of power materials and cylindrical specimens with different Al particle size. The active decomposition temperature of ZrH₂ was obtained by TG-DSC, and the quasi-static mechanics/reaction characteristics as well as the impact sensitivity of the specimen were studied respectively by quasi-static compression and drop-hammer test. The results show that the yield strength of the material decreased with the increase of the Al particle size, while the compressive strength, failure strain and toughness increased first and then decreased, which reached the maximum values of 116.61 MPa, 191%, and 119.9 MJ/m respectively when the Al particle size is 12–14 μm because of particle size grading. The specimens with the highest strength and toughness formed circumferential open cracks and reacted partly when pressed. Those with developmental cracks formed inside did not react. It is considered that fracture of specimens first triggered initial reaction between Al and PTFE to release an amount of heat. Then ZrH₂ was activated and decomposed, and participated in subsequent reaction to generate ZrC. The impact sensitivity of the specimens decreased with the increase of Al particle size.

为了研究不同Al粒径下Al / ZrH ₂ / PTFE的热分解以及中低应变速率下的机械强度和冲击敏感性，采用成型真空烧结法制备了四组不同的功率材料和圆柱试样。 Al颗粒尺寸。ZrH ₂的活性分解温度通过TG-DSC得到样品，并通过准静态压缩和落锤试验分别研究了样品的准静态力学/反应特性和冲击敏感性。结果表明，材料的屈服强度随Al粒径的增加而降低，而抗压强度，破坏应变和韧性先升高后降低，分别达到116.61 MPa，191％和119.9 MJ的最大值。由于粒径分级，当Al粒径为12–14μm时分别为/ m。具有最高强度和韧性的试样形成周向开裂并在受压时发生部分反应。那些内部形成有裂纹的人则没有反应。据认为，试样的断裂首先触发了Al和PTFE之间的初始反应，从而释放出大量的热量。然后ZrH₂被活化并分解，并参与随后的反应以生成ZrC。样品的冲击敏感性随着Al粒径的增加而降低。