Study on Combustion Characteristics and Performance of HTPB/AP Propellants Containing Zirconium

Min, Byoung-Sun; Hyun, Hyung Soo

doi:10.2514/1.56775

Cited by 1 publication

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“…However, the fundamental flaws of zirconium powders, such as lower energy density than aluminum, and the high melting point (1852°C), have limited the application and development of zirconium. Further, the zirconium powder is not sufficiently burned in the air, a large amount of unburned metal remains in the combustion products [21,22]. Thus, it is significant to develop ZrAl 3 /Al composite fuels.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Microstructure and Thermal Property of ZrAl₃/Al Composite Fuels

Zou

Shi

et al. 2019

Propellants Explo Pyrotec

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ZrAl 3 /Al composite fuels x = 10,20,30, 40, 50, 53 wt.%) were prepared by the non-consumable arcmelting technique and close-coupled gas-atomization. In order to study the effects of the zirconium content and the oxygen partial pressure on the thermal properties of composite fuels, X-ray diffraction, scanning electron microscopy, TG-DTA and DSC were used to characterize the composite fuels, respectively. The result shows that the addition of zirconium leads to the formation of a special structure inside the powder, promoting the oxidation of ZrAl 3 /Al composite fuels. Besides, non-selective oxidation of ZrAl 3 played an important role in promoting the oxidation process. The oxygen bomb experiment was conducted to evaluate the combustion performance of ZrAl 3 /Al composite fuels. Oxygen bomb experiments show that the gravimetric combustion enthalpy of the composite fuels decreases linearly with the increase of zirconium content, and increases with the increase of oxygen partial pressure. However, the volumetric combustion enthalpy decreases first and then increases with the increase of zirconium content, and shows a general upward trend when the partial pressure of oxygen reaches 2.5 MPa or more. The pressure curve indicates that the Al-53Zr composite fuels have the maximum pressure propagation rate (dP/dt) max (which characterizes the maximum flame propagation rate and higher energy releasing rates) in the prepared series of composite fuels. The study demonstrates a complete combustion of ZrAl 3 /Al composite fuels under high pressure. ZrAl 3 /Al composite fuels could be considered as a very promising energetic additive in the field of new-energetic material.

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Section: Introductionmentioning

confidence: 99%