Effect of fluorinated graphite on combustion of boron and boron-based fuel-rich propellants

摘要: The effects of fluorinated graphite (CF^) with different fluorine contents (x = 0.08, 0.25, and 1.17) on the combustion boron powder (B) boron-based fuel-rich propellants were experimentally investigated. contain ammonium perchlorate (AP) (28%), magnalium alloy (8%), hydroxy-terminated polybutadiene (HTPB) (27%), agglomerates (37%, in 300-, 600-, 850-, 1180-/urn sizes), immediate contact between CFA amorphous (1:14 1:7 mass ratio) by means a small amount polymethyl methacrylate binder. reactions CF,,. investigated adiabatic calorimetry under oxygen, thermogravimetry argon, using E/C¥X mixtures. baselines CFX studied separately. Because liberation highly reactive products such as unsaturated fluorocarbon from CFV decomposition, more heat is evolved due to reaction compared baseline without CFV. Possible exothermic involved system containing C, B, O, F quadruple elements proposed. Propellants CF^ found increase burning rate and/or pressure exponent CFX. An interpretation based intensive among decomposition CF,, AP, HTPB, etc., was Boron agglomerate size can affect because mixed sink, condensed phase reactions, flame structures at pressures.