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A Method for Studying Reaction Mechanism and Safety Evaluation of Energetic Materials

A reaction mechanism and safety technology, applied in the field of research on the reaction mechanism and safety assessment of energetic materials, can solve the problems of lack of research on the reaction process, law and mechanism, inability to fundamentally control combustion or detonation, and pending research , to achieve the effects of easy control of thermodynamic parameters, rapid and uniform thermal stimulation environment, and safe and reliable experiments

Active Publication Date: 2020-07-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using the cook-off method to test the safety of energetic materials, the demand for samples is large, the safety of the experiment itself is poor, and the cost is high
At the same time, the response of energetic materials to rapid thermal and force stimuli in manufacturing, storage, transportation, and actual combat environments remains to be studied
However, there is a lack of research on the reaction process, law and mechanism of energetic materials under external stimuli.
At present, we can only take measures to prevent accidents based on macro experience, and cannot effectively quantify the critical threshold of energetic material reactions, and cannot fundamentally control the occurrence of combustion or detonation, which restricts the development of high-performance weapons.

Method used

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  • A Method for Studying Reaction Mechanism and Safety Evaluation of Energetic Materials
  • A Method for Studying Reaction Mechanism and Safety Evaluation of Energetic Materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like image 3As shown, 30 mg each of NC / NG samples of bulk, floc and powder energetic materials were prepared respectively. Determine the composition of the mixed gas in the visual combustion chamber of the fast compressor as oxygen at 0.21 bar, nitrogen at 0.78 bar and argon at 0.5 bar as the diluent gas. Put 30 mg of bulk energetic material sample NC / NG on the stage of the visualized combustion chamber, and use the end cap to seal the visualized combustion chamber.

[0041] Use a vacuum pump to evacuate the visible combustion chamber, and record the pressure value in the combustion chamber as 0.006 bar through the pressure sensor. Fill the combustion chamber with oxygen until the reading on the pressure gauge is 0.216bar, continue to fill in nitrogen until the reading on the pressure gauge is 0.996bar, and finally fill in argon until the reading on the pressure gauge is 1.496bar.

[0042] The bulk NC / NG sample and the gas mixture in the visualized combustion chamber...

Embodiment 2

[0045] 20 mg each of powdered energetic material samples RDX and NC / NG were prepared respectively. Determine the composition of the mixed gas in the visual combustion chamber of the fast compressor as oxygen at 0.21 bar, nitrogen at 0.78 bar and argon at 0.5 bar as the diluent gas. Put 20 mg of powdered energetic material sample RDX on the stage of the visualized combustion chamber, and use the end cap to seal the visualized combustion chamber.

[0046] Use a vacuum pump to evacuate the visible combustion chamber, and record the pressure value in the combustion chamber as 0.0058bar through the pressure sensor. Fill the combustion chamber with oxygen until the reading on the pressure gauge is 0.2158 bar, continue to fill in nitrogen until the reading on the pressure gauge is 0.9958 bar, and finally fill in argon until the reading on the pressure gauge is 1.4958 bar.

[0047] The powdered RDX sample and the gas mixture in the visualized combustion chamber are compressed using a...

Embodiment 3

[0050] Prepare 20 mg of powdery energetic material sample NC / NG. It is determined that the composition of the mixed gas in the visual combustion chamber of the fast compressor is oxygen at 0.21 bar, and nitrogen at 0.78 bar as the diluent gas. Put 20 mg of powdered energetic material sample NC / NG on the stage of the visualized combustion chamber, and seal the visualized combustion chamber with the end cap.

[0051] Use a vacuum pump to evacuate the visible combustion chamber, and record the pressure value in the combustion chamber as 0.0061 bar through the pressure sensor. Fill the combustion chamber with oxygen until the reading on the pressure gauge is 0.2161bar, and continue to fill in nitrogen until the reading on the pressure gauge is 0.9961bar.

[0052] The powdered NC / NG sample and the gas mixture in the visualized combustion chamber are compressed using a fast compressor. The pressure change curve of the compression process is recorded by the pressure sensor, such as...

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Abstract

The invention discloses a method for researching an energetic material reaction mechanism and evaluating safety. According to the method, a quick compressor and a visual combustion chamber are utilized to realize quick and uniform thermal stimulation loading of energetic materials and record of the visual process of the reaction process. A temperature rising rate of the thermal stimulation can reach 2 x 104K / s, and thermodynamic parameters are easy to determine and control. The method is suitable for different types of energetic materials, and the shapes of the energetic materials are dividedinto blocks, floccules and powder. The dosage of the energetic material is 1-100 mg, the cost is low, and the experimental safety coefficient is high. By utilizing the method, the ignition boundary condition and the reaction mechanism of the energetic material sample can be obtained by comparing different experimental results.

Description

technical field [0001] The invention belongs to the field of reaction mechanism and safety evaluation of energetic materials, and specifically relates to a method for studying the reaction mechanism and safety evaluation of energetic materials, which is used for studying the boundary conditions of ignition and non-ignition of energetic materials, chemical activity of energetic materials Assess and guide the safe use of energetic materials. Background technique [0002] Energetic materials are a class of compounds or mixtures containing explosive groups or oxidants and combustibles that can independently undergo chemical reactions and output energy. They are important components of military explosives, propellants and rocket propellant formulations. In the military field, high-energy energetic materials are an inevitable trend. However, with the high energy of energetic materials, the safety of bombs, missiles and propellants will decrease, which will affect the practicabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/26G01N25/12G01N25/18G01N33/22
CPCG01N25/12G01N25/18G01N25/26G01N33/227
Inventor 汤成龙杨猛丁晓倩杨锐黄佐华
Owner XI AN JIAOTONG UNIV
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