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通过控制球磨时间及Al和Ti的质量比,用机械球磨法制备了一种无定型的球形Al/Ti合金粉,其平均粒径为3.76 μm.研究了这种合金粉对HNS、LLM-105、RDX、HMX和CL-20这5种高能炸药热分解的催化作用.结果 表明,与原料HNS比较,添加了5％(质量分数)Al/Ti非晶态合金粉的HNS在不同的升温速率下其热分解峰温分别降低了6.9、7.2、4.8和5.2℃.同样,对于其它4种炸药,添加Al/Ti后炸药的热分解温度较原料都明显降低.同时,计算了所有炸药样品热分解过程的热动力学参数.结果 表明,相对于原料炸药,添加了Al/Ti非晶态合金粉的炸药其热分解活化能分别降低了52.378 kJ.mol-1 (HNS)、41.664 kJ.mol-1 (LLM-105)、8.6 kJ·mol-1(RDX)、48.4 kJ·mol-1(HMX)和46.7 kJ·mol-1 (CL-20).这说明Al/Ti非晶态合金粉对高能炸药的热分解过程有明显的催化作用.“,”By controlling the milling time and the mass proportion of Al to Ti,the metallic amorphous Al/Ti spherical particles (Al/Ti alloy) with a mean size of 3.76 μm were fabricated by mechanical milling method.The catalysis effects of the as-prepared Al/Ti alloy on the thermolysis of five explosives,namely hexanitrostilbene (HNS),2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105),cyclotrimethyltrinitroamine (RDX),cyclotetramethylenetetranilamine (HMX),and hexanitrohexaazaisowurtzitane (CL-20) were probed by thermal analysis.Results show that for HNS doped with 5wt％ Al/Ti particles,the decomposition peak temperature (Tp) decreases by 6.9,7.2,4.8 and 5.2 ℃ at different heating rates compared with raw HNS.Similarly,for the rest four explosives,the Tp value of the doped explosives also decreases compared with the respective raw explosive.All thermodynamic parameters of the explosives were calculated.It is indicated that the active energy (EK) of the doped explosives is declined by 52.378 kJ·mol-1 (HNS),41.664 kJ·mol-1,(LLM-105),8.6 kJ·mol-1 (RDX),48.4 kJ·mol-1 (HMX),and 46.7 kJ·mol-1 (CL-20).It is ascertained that doping spherical amorphous Al/Ti alloy can promote the thermal decomposition of explosives.