摘要
为研究某型水下武器发射装置中的改性双基推进剂的力学性能,通过调整固体添加物粒径,对比分析不同粒度Al粉和不同粒度SiC/Al2O3的改性双基推进剂力学性能.结果表明,在Al/SiC推进剂中,推进剂的常温抗拉强度和常温最大伸长率随着Al粉粒径的增大呈现先降低后增大的趋势;在不同Al粉粒径下,推进剂的力学性能随SiC粒度变化趋势不同.Al粉粒径为20 μm,SiC粒度为W2.5时,低温和常温抗拉强度最大,分别为37.5 MPa和6.58 MPa;Al粉粒径为140μm,SiC粒度为W1.5时,高温抗拉强度最大,为2.22 MPa;加入Al2O3替代SiC后,低温抗拉强度最大为38.3 MPa,比SiC作为弹道稳定剂的推进剂高2.1％,常温抗拉强度最大值高7.1％,高温抗拉强度最大值高4.3％.可见通过调整固体添加物A1粉和SiC/Al2O3粒径,可实现对改性双基推进剂的力学性能进行局部调控,为水下发射装置的推进剂配方设计提供有效手段.
Abstract
In order to study the mechanical properties of modified double base propellants in a underwater launch device,the mechanical properties of modified double base propellants with different particle sizes of Al powder and SiC/Al2O3 were compared and analyzed by adjusting the particle size of solid additives.The results show that in Al/SiC pro-pellants,the tensile strength and maximμm elongation at room temperature of the propellant show a trend of first decreasing and then increasing with the increase of Al powder particle size;The mechanical properties of the propellant exhibit differ-ent trends with the variation of SiC particle size under different Al powder particle sizes.When the particle size of Al powder is 20 μm and the particle size of SiC is W2.5,the tensile strength at low temperature and room temperature is the highest,with 37.5 MPa and 6.58 MPa,respectively;When the particle size of Al powder is 140 μm and the particle size of SiC is W1.5,the highest high-temperature tensile strength is 2.22 MPa;After adding Al2O3 instead of SiC,the maximμm low-tem-perature tensile strength is 38.3 MPa,which is 2.1％higher than the propellant using SiC as a ballistic stabilizer.The maximμm low-temperature tensile strength is 7.1％higher,and the maximμm high-temperature tensile strength is 4.3％high-er.It is concluded that by adjusting the solid additives Al powder and SiC/Al2O3 particle size,local regulation of the mech-anical properties of modified double base propellants can be achieved,providing effective means for the propellant formula-tion design of underwater launch devices.
基金项目
装备发展部领域基金重点项目(61402070104)
维普
万方数据