阅读说明：本技术 一种用于含硼推进剂的高能金属燃料 (High-energy metal fuel for boron-containing propellant ) 是由 任慧 李雅茹 王慧心 焦清介 闫石 邓鹏� 于 2020-07-24 设计创作，主要内容包括：本发明涉及一种用于含硼推进剂的高能金属燃料,属于含能材料领域。以所述燃料配方总体质量为100％计,各组成成分及其质量分数为：铝粉75.0％～90.0％,硼粉10.0％～25.0％。所述燃料通过加氢球磨法制得。所述燃料中的铝硼粉弥补了传统铝粉燃烧热不足,释热效率低,能量增加受限的技术瓶颈,适用于含硼推进剂,显著提升了推进剂的比冲,应用前景良好；铝硼粉成本低廉,适合大规模生产。(The invention relates to a high-energy metal fuel for a boron-containing propellant, and belongs to the field of energetic materials. The fuel comprises the following components in percentage by mass based on 100% of the total mass of the fuel formula: 75.0-90.0% of aluminum powder and 10.0-25.0% of boron powder. The fuel is prepared by a hydrogenation ball milling method. The aluminum boron powder in the fuel makes up the technical bottlenecks of insufficient combustion heat, low heat release efficiency and limited energy increase of the traditional aluminum powder, is suitable for boron-containing propellants, obviously improves the specific impulse of the propellants and has good application prospect; the aluminum boron powder has low cost and is suitable for large-scale production.)

1. A high energy metal fuel for use in a boron-containing propellant, characterized by: the fuel comprises the following components in percentage by mass based on 100% of the total mass of the fuel formula:

75.0 to 90.0 percent of aluminum powder,

10.0 to 25.0 percent of boron powder.

2. A method of making the high energy metal fuel for a boron-containing propellant of claim 1, wherein: the method is a hydrogenation ball milling method and comprises the following specific steps:

placing the agate balls, the aluminum powder and the boron powder into a ball milling tank of a ball mill, performing ball milling in a hydrogen environment at 400-600 ℃, stopping ball milling, slowly cooling to room temperature at a speed of 15-60 ℃/min, then stopping introducing hydrogen, and slowly oxidizing for 2-6 h in an air atmosphere of 10-30 mL/min to prepare the high-energy metal fuel for the boron-containing propellant.

Technical Field

The invention relates to a high-energy metal fuel for a boron-containing propellant, and belongs to the field of energetic materials.

Background

The metal powder has high density and high reaction heat value, and can release a great deal of heat energy during combustion, thereby improving the specific impulse of the propellant and the combustion temperature. In addition, the solid metal oxide fine particles produced by combustion also function to suppress the hunting combustion. The solid rocket ramjet is suitable for using oxygen-poor propellant, and the metal fuel can effectively adjust the oxygen-poor level and energy parameters of the propellant, so the metal fuel is widely applied to the solid rocket propellant. The metal aluminum powder is the most commonly used metal fuel due to high density, good combustion performance and low cost, but the mass and volume combustion heat value of the aluminum powder is only half of that of boron, and the aluminum powder is easy to melt and agglomerate in the combustion process, thereby reducing the combustion efficiency. The magnesium-aluminum metal powder can effectively improve the combustion performance of the metal aluminum, but the magnesium density is low, and the combustion heat value is worse than that of aluminum powder, so that the energy performance of the propellant taking magnesium-aluminum powder as fuel is not ideal. Boron, as the elemental solid phase fuel with the highest calorific value, is undoubtedly an important fuel for improving the energy performance of the propellant.

However, boron powder has a high ignition point and a melting point higher than 2500K, and if aluminum powder is completely replaced by boron powder with a high heat value, ignition difficulty occurs, and even if combustion occurs, if the temperature in an engine is not high enough to maintain subsequent combustion, a large amount of boron powder cannot be combusted, so that the boron powder stays in the engine, and accident potential is caused. Therefore, how to use boron powder as propellant fuel is an engineering challenge.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a high-energy metal fuel for a boron-containing propellant, which can improve the combustion performance of the propellant and increase the energy level of the propellant.

In order to achieve the purpose of the invention, the following technical scheme is provided.

The high-energy metal fuel for the boron-containing propellant comprises the following components in percentage by mass, based on 100% of the total mass of the fuel formula:

75.0 to 90.0 percent of aluminum powder,

10.0 to 25.0 percent of boron powder.

The invention relates to a preparation method of a high-energy metal fuel for a boron-containing propellant, which is a hydrogenation ball milling method and comprises the following specific steps:

placing agate balls, aluminum powder and boron powder into a ball milling tank of a ball mill, performing ball milling in a hydrogen environment at 400-600 ℃, stopping ball milling, slowly cooling to room temperature at a speed of 15-60 ℃/min, then stopping introducing hydrogen, and slowly oxidizing for 2-6 h in an air atmosphere of 10-30 mL/min to obtain the high-energy metal fuel for the boron-containing propellant.

Advantageous effects

1. The invention provides a high-energy metal fuel for a boron-containing propellant, which is suitable for the boron-containing propellant, solves the technical bottleneck that the energy increase of the conventional propellant is limited, obviously improves the specific impulse of the propellant, and has wide application prospect in the fields of solid rocket engines, remote missiles and the like.

2. The invention provides a high-energy metal fuel for a boron-containing propellant, the aluminum boron powder in the fuel makes up the problems of insufficient combustion heat and low heat release efficiency of the traditional aluminum powder, provides a new idea for manufacturing and using the high-energy metal fuel, and is low in cost and suitable for large-scale production.

Detailed Description

The invention will be described in more detail with reference to specific examples, which should not be construed as limiting the scope of the invention.