Erosivity and Performance of Nitrogen‐Rich Propellants

Abstract

Five propellant formulations were test fired both in a vented vessel and a closed vessel. Two formulations contained 35 % weight of nitrogen‐rich materials. The erosion by weight of the propellants ranged from 0.53 g to 1.31 g after two consecutive test firings of a given propellant. The addition of nitrogen‐rich materials resulted in reduced erosion. Scanning electron microscope and energy dispersive X‐ray spectroscopy revealed nitrogen in the erosion pieces for one of the reference propellants (SB) and the two nitrogen‐rich propellants. The two hottest propellants cause melting of the erosion pieces. The presence of nitrogen‐rich materials has a tremendous impact on the burning rates with the burning rate increase at 100 MPa reaching up to 2.4 times that of the formulation used as the base for the nitrogen‐rich propellants.

Linear Burning Rate and Erosivity Properties of Nitrocellulose Propellant Formulations Plasticized by Glycidyl Azide Polymer and Nitroglycerine

“…Figure 9 show that the models fit the data each with a determination coefficient of 0.97 and that the values follow the same trend as the work of Lavoie et al. [35].…”

Influence of Various Flame Temperatures of the Gun Propellant on the Effectiveness of the Erosion Inhibitor and Relevant Mechanisms

“…Additionally, the O content of the TB# steel sample was lower than that of other samples, measuring at 9.16%. This could be attributed to a higher percentage of N 2 in the gas product composition of TB# propellant, which relates to the protective effects of nitrogen, effectively reducing the chemical erosivity of gases at the steel interface. , …”

“…This could be attributed to a higher percentage of N 2 in the gas product composition of TB# propellant, which relates to the protective effects of nitrogen, 32 effectively reducing the chemical erosivity of gases at the steel interface. 33,34 Figures 6 and 7 6,32 In contrast, as shown in Figure 9e−j, TB#, DB-2#, and NB# propellants resulted in more cracks on the steel surface. The formation of cracks derives from stress generated in a steep temperature gradient 32 and disparate volumes of various iron phases generated in the heat-affected zone.…”

Insights into the 5,5′-bis(1H-tetrazolyl)amine monohydrate (BTA·H2O) pyrolysis mechanism: integrated experimental and kinetic model analysis

“…22 The experimental results showed that the decomposition products of DHT could accelerate the thermal decomposition process of the propellant components. In addition, the influence of 5,5 0bis(1H-tetrazolyl)-amine (BTA) and 5,5 0 -hydrazine-bistetrazole (HBT) on the thermal decomposition, erosion, and combustion behavior of a typical triple-base gun propellant was also studied, 11,23 and it was found that the propellant containing BTA or HBT showed a lower flame temperature than the gun propellant prepared with the reference formula. At the same time, the burning rate of the gun propellant increased when BTA or HBT was added.…”