Journal
PROPELLANTS EXPLOSIVES PYROTECHNICS
Volume 47, Issue 10, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/prep.202200087
Keywords
Nano-CuCr2O4; AP; HTPB propellant; AP; CMDB propellant; Thermal decomposition; Combustion
Categories
Funding
- National Natural Science Foundation of China [21805139, 12102194]
- Basic Product Innovation Technology Research Project of Explosives and Young Elite Scientists Sponsorship Program by CAST [2021QNRC001]
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This investigation explores the application performance of nano-combustion catalyst CuCr2O4 in solid propellants. The results show that nano-CuCr2O4 can improve the surface defects of the propellant and significantly increase its density and burning rate. This catalyst is expected to be widely used in solid propellants.
This investigation was devoted to exploring the application performance of nano-combustion catalyst CuCr2O4 in solid propellants. In this paper, raw CuCr2O4 and nano-CuCr2O4 prepared by the mechanical grinding method were applied in solid propellants containing ammonium perchlorate (AP), which are ammonium perchlorate/ hydroxy-terminated polybutadiene propellant (AP/HTPB) and ammonium perchlorate/composite modified double-base propellant (AP/CMDB). And the scanning electron microscope, displacement volume method, thermogravimetric analysis, differential scanning calorimetry, and strand burner method were employed to characterize the performance of AP-based solid propellants. The results show that the AP/HTPB propellant has fewer defects on the surface of it due to the presence of nano-CuCr2O4, but it has no significant effect on the AP/CMDB propellant. Nano-CuCr2O4 can also significantly increase the density of AP/HTPB propellant and AP/CMDB propellant to 1.736 g/cm(3) and 1.633 g/cm(3), respectively. Nano-CuCr2O4 obviously advances the decomposition temperature of AP/HTPB propellant and AP/CMDB propellant, which also increases the apparent heat of decomposition. In addition, the burning rate of nano-CuCr2O4-AP/HTPB propellant and nano-CuCr2O4-AP/CMDB propellant increased to 1.60 mm/s and 3.23 mm/s, with an increase of 28.3 % and 26.3 %, respectively. Therefore, nano-CuCr2O4 is expected to be widely used in solid propellants due to its excellent properties.
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