Influence of Aluminum Powder on the Detonation of Ammonium Nitrate and Aluminum Mixture

摘要

The detonation behavior of a mixture of ammonium nitrate (AN) and aluminum (Al) powder was investigated experimentally in order to understand the influence of the properties of Al powder on this behavior. The detonation velocity increased with a decrease in the Al particle size, and the detonation velocity of a mixture with flaked Al was higher than that of a mixture with atomized Al for the same particle size. Electron microscopic photographs suggested that the contact situation between the particles of Al and AN is related to the detonation. Moreover, the blast wave pressure obtained with atomized Al increased with a decrease in the Al particle size, while that obtained with flaked Al was constant. The addition of Al increased the shock sensitivity of AN. However, it was found that the properties of Al powder had no influence on the sensitivity.