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采用浇注工艺制备了GZT部分取代RDX的系列含催化剂的RDX-CMDB推进剂样品。研究了GZT对含催化剂的RDX-CMDB推进剂的燃速、压强指数及燃烧火焰结构等燃烧性能的影响,对比分析了GZT对含催化剂和不含催化剂的RDX-CMDB推进剂燃烧行为影响不同的原因,并采用DSC实验初步研究了含GZT和催化剂的RDX-CMDB推进剂的热行为。结果发现,GZT对推进剂的火焰温度、火焰的暗区厚度、燃面上的亮点数目、燃烧表面对凝聚相的温度梯度等都呈现一定规律性的影响;在1～10 MPa内,GZT使含催化剂的RDX-CMDB推进剂燃速降低,压强指数升高;热行为研究表明,含催化剂的GZT-RDX-CMDB推进剂的DSC曲线上出现了GZT单独分解峰,且DSC的第一分解峰温随GZT的加入而减小。
A series of catalyst-containing RDX-CMDB propellant samples with GZT partially substituted for RDX were prepared by a casting process. The effects of GZT on the combustion rate, pressure index and combustion performance of the catalyst-containing RDX-CMDB propellants were studied. The effects of GZT on the combustion behavior of RDX-CMDB propellant with and without catalyst were analyzed. The thermal behavior of RDX-CMDB propellants containing GZT and catalyst was preliminary studied by DSC. The results show that the GZT has a certain regularity on the flame temperature, the dark zone thickness of flame, the number of bright spots on the combustion surface, the temperature gradient of the combustion surface on the condensed phase, etc. In the range of 1 ~ 10 MPa, The RDX-CMDB propellant with catalyst showed a lower burning rate and a higher pressure index. The thermal behavior showed that the GZT single decomposition peak appeared on the DSC curve of the catalyst-containing GZT-RDX-CMDB propellant and the first decomposition peak Temperature decreases with the addition of GZT.