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Plateau Burning Characteristics of AP Based Azide Composite Propellants
Author(s) -
Oyumi Yoshio,
Anan Toshiyuki,
Bazaki Hakobu,
Harada Tadamasa
Publication year - 1995
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19950200311
Subject(s) - ammonium perchlorate , propellant , thermogravimetric analysis , differential scanning calorimetry , catalysis , composite number , combustion , chemistry , phase (matter) , plateau (mathematics) , materials science , chemical engineering , composite material , inorganic chemistry , thermodynamics , organic chemistry , physics , engineering , mathematical analysis , mathematics
The site and mechanism by which iron oxide catalyst acted to enhance burning rate and produced plateau burning behavior at high pressure was studied. The condensed phase chemistry study was conducted by isothermal thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), and rapid‐scan FTIR spectroscopic technique. Uncatalyzed ammonium perchlorate (AP) based azide composite propellant showed unstable combustion at relatively lower pressure region. The heat balance at the buring surface would be unstable at these pressures. However, iron oxide altered the burning property of the propellant and enhanced the burning rate with the plateau‐mesa burning characteristics. Such pressure insensitiveness of the burning rate indicated that the condensed phase chemistry played important role in the catalytic mechanism of action. According to the microrocket motor tests, physical effect, melted fuel binder covered the AP particles and prevented the further decomposition of AP, had not affected the plateau burning. Fe 2 O 3 was more effective on the burning rate augmentation than Fe 3 O 4 . However, the pressure exponent of the burning rate point of view Fe 3 O 4 was favored catalyst to the propellant used here.