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Preparation and Performance of BOM Melt Cast Explosive
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1.Xi′an Modern Chemistry Research Institute, Xi′an 710065, China;2.Rocket Force University of Engineering, Xi′an 710025, China

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    Abstract:

    In order to study the performance of 3,3''-bi(1,2,4-oxadiazole)-5,5''-diylbis(methylene)dinitrate (BOM), the sample was prepared by using the melting casting process and its the detonation velocity was measured. The thermal safety of the BOM casting process was studied by the thermal decomposition and constant temperature test. The solidification properties of BOM were studied by macroscopic solidification molding and microscopic solidification crystallization test. The mechanical properties of the BOM casting were studied by compressive and tensile tests. The detonation velocity and detonation heat properties of BOM/HMX/Al melt-cast explosive system were analyzed by detonation performance calculation. The results show that the natural solidification density of BOM is 1.726 g·cm-3 and the detonation velocity is 7679 m·s-1. The peak temperature of BOM decomposition is 213.8 ℃, and the calculated critical temperature of thermal explosion is 190.7 ℃. There is no discoloration and smoke during the constant temperature heating, which shows satisfactory thermal safety of the melt-casting process. The solidification defects of BOM were concentrated in the feeding area at the top of the casting, The volume shrinkage rate of natural solidification was 15.7%, and the forming density was 94.7% of the theoretical density, indicating good solidification and forming performance. The compressive strength of the casting is 6.21 MPa and the tensile strength is 1.89 MPa. In the BOM/HMX/Al melt-cast explosive system, the detonation velocity decreases linearly with the increase of Al content. When the Al content is less than 24%, the detonation heat increases gradually with the increase of Al content. When the Al content is more than 24%, the detonation heat is related to the ratio of BOM and HMX in the formula, and the ratio of BOM and HMX system needs to be adjusted to meet the optimal Al/O ratio of the formula.

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Get Citation

巨荣辉,罗一鸣,王晓峰,等. BOM熔铸炸药的制备与性能[J].含能材料,2021,29(9):781-789.
JU Rong-hui, LUO Yi-ming, WANG Xiao-feng, et al. Preparation and Performance of BOM Melt Cast Explosive[J]. Chinese Journal of Energetic Materials,2021,29(9):781-789.

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History
  • Received:August 21,2020
  • Revised:June 10,2021
  • Adopted:March 26,2021
  • Online: May 20,2021
  • Published: September 25,2021