Erosion behavior of gun barrel material under azidonitramine gun propellant loading conditions

To study the erosion behavior of azidonitramine propellant on gun barrel material, a high-energy component-based azidonitramine gun propellant was prepared by using NC (Nitrocellulose), NG (Nitroglycerin), and RDX (Hexogen). The erosion characteristics of the propellants were determined using a vented vessel method. The erosion behavior of the gun barrel material was investigated through morphological and element analysis. And the erosion characteristics of the gun barrel material under different propellant flame temperatures and loading densities were analyzed. The results indicated that the erosion degree of the gun barrel material samples intensified with increasing flame temperature and loading density. SEM (Scanning Electron Microscope) observations showed that the surface flatness of the erosion samples decreased with higher propellant flame temperature and decreased followed by an increase with varying propellant loading densities. The surfaces of samples under different loading conditions exhibited various typical features, including solid particles, clusters, erosion pits, erosion marks, and rod-like solids. EDS (Energy Dispersive Spectrometer) testing revealed that, compared to the pre-erosion samples, the content of C and Fe on the surface of the erosive samples decreased, while the content of elements such as Mn, Ni, and Mo increased. The content of C, O, and Cr elements increased in the erosion pits, along with the detection of V. Finally, based on the experimental results, the morphological and elemental distribution characteristics of the gun barrel material after erosion were summarized.