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为了研究粒径为50nm的纳米镍粉(nano-Ni)对含Al改性双基(Al-CMDB)推进剂、含六硝基六氮杂异伍兹烷(CL-20)改性双基(CL-20-CMDB)推进剂燃烧性能的影响,通过吸收-压延的方法制备了推进剂样品,用靶线法测试了推进剂的燃速,并计算了压强指数。通过电镜扫描、火焰照片、燃烧波、熄火表面形貌及元素分析和DSC分析了纳米镍粉对Al-CMDB推进剂燃烧性能影响的原因。结果表明,在Al-CMDB推进剂中加入nano-Ni可大幅度提高推进剂燃速,降低推进剂的压强指数;当加入质量分数0.7%的nano-Ni时推进剂10MPa的燃速达到35.59mm/s,8~20MPa压强指数从0.43降低至0.17,15~20MPa出现麦撒效应。在CL-20-CMDB推进剂中加入质量分数0.5%的nano-Ni能明显提高推进剂的中低压(4~10MPa)燃速,8~20MPa压强指数约为0.01,15~20MPa出现麦撒效应。
In order to study the effect of nano-Ni powder with particle size of 50nm on the modification of Al-CMDB propellants containing hexanitrohexaazaisowurtzitane (CL-20) CL-20-CMDB) propellants, a propellant sample was prepared by absorption-calendering method, the burning rate of the propellant was tested by the target line method, and the pressure exponent was calculated. The reason of the effect of nano-nickel powder on the combustion performance of Al-CMDB propellants was analyzed by SEM, flame photo, combustion wave, flameout surface morphology and elemental analysis. The results show that the addition of nano-Ni to Al-CMDB propellant can greatly improve the burning rate of the propellant and reduce the pressure exponent of the propellant. When the nano-Ni with mass fraction of 0.7% is added, the burning rate of propellant at 10MPa reaches 35.59mm / s, 8 ~ 20MPa pressure index decreased from 0.43 to 0.17, 15 ~ 20MPa appeared Maysa effect. Adding 0.5% nano-Ni to the CL-20-CMDB propellant can obviously improve the medium and low pressure (4 ~ 10MPa) burning rate of the propellant. The compressive strength index of 8 ~ 20MPa is about 0.01 and 15 ~ 20MPa. .