Evaluation of Nano-Co sub(3)O sub(4) in HTPB-Based Composite Propellant Formulations

• Published in: Propellants, explosives, pyrotechnics Vol. 41; no. 2; pp. 304 - 311
• Main Authors: Kshirsagar, Dhirendra R, Jain, Sunil, Jawalkar, Shekhar N, Naik, Nilesh H, Pawar, Suman, Maurya, Mehilal
• Format: Journal Article
• Language: English
• Published: 01-04-2016
• Subjects: Accumulation; Composite propellants; Formulations; Nanostructure; Propellants; Reduction; Thermal properties; Viscosity
• ISSN: 0721-3115; 1521-4087
• DOI: 10.1002/prep.201500158

Different propellant compositions were prepared by incorporating nano-sized cobalt oxide from 0.25% to 1% in HTPB/AP/Al-based composite propellant formulations with 86% solid loading. The effects on viscosity build-up, thermal, mechanical and ballistic properties were studied. The findings revealed that by increasing the percentage of nano-Co sub(3)O sub(4) in the composition, the end of mix viscosity, the modulus and the tensile strength increased, whereas the elongation decreased accordingly. The thermal property data envisaged a reduction in the decomposition temperature of ammonium perchlorate (AP) as well as formulations based on AP. The ballistic property data revealed an enhanced burning rate from 6.11mms super(-1) (reference composition) to 8.99mms super(-1) at 6.86MPa and a marginal increase in pressure exponent from 0.35 (reference composition) to 0.42 with 1% nano-cobalt oxide.