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http://dx.doi.org/10.6108/KSPE.2018.22.2.059

Study on the Long-term Thermal Stability by DSC & ARC and its ISCO behaviors with different AP Quality  

Kim, Seunghee (The 4th R&D Institute - 2nd Directorate, Agency for Defense Development)
Kwon, Kuktae (The 4th R&D Institute - 2nd Directorate, Agency for Defense Development)
Lee, So Jung (The 4th R&D Institute - 2nd Directorate, Agency for Defense Development)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.22, no.2, 2018 , pp. 59-65 More about this Journal
Abstract
We conducted an isothermal slow cook-off(ISCO) test for an aluminized explosive containing AP. The sample bulged before the run-away reaction, and therefore we were unable to obtain the ISCO data. However, these phenomena did not occur for a certain AP grade, which means that the quality of the AP exerted a significant effect on the thermal stability of the explosive formulation. In this study, we investigated the thermal stability difference between a good and bad AP grade. First, we characterized the thermal properties of all APs by Differential Scanning Calorimeter(DSC) and correlated them to the ISCO phenomena. In addition to the DSC study and ISCO test, we also investigated and calculated the SADT and self-heating rate by the ARC of the different AP qualities to interpret the thermal stability of the explosive formulation. Moreover, we investigated the impurity of the AP and a preparation method to remove the included impurity and crystallization. Finally, we implemented qualification methods to identify the quality of AP by DSC using a high-pressure crucible.
Keywords
Ammonium Perchlorate(AP); Thermal Stability; Isothermal Slow Cook-off Test(ISCO); Differential Scanning Calorimeter(DSC); Accelerated Rate Calorimeter(ARC);
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