Energetic propellant powder based on magnesium-nickel-based metal hydride mixing and preparation method and application of energetic propellant powder

Abstract

The invention discloses an energetic propellant based on magnesium-nickel-based metal hydride blending as well as a preparation method and application of the energetic propellant. The preparation method comprises the following steps: step 1, taking metal Mg and Ni elementary substances as raw materials, and preparing magnesium-nickel-based metal alloy powder by adopting a mechanical alloying method; s2, the magnesium-nickel-based metal alloy powder is subjected to hydrotreating, and magnesium-nickel-based metal hydride is obtained; and S3, the magnesium-nickel-based metal hydride is coated with graphene, mechanical ball milling is conducted, the magnesium-nickel-based metal hydride and a monoaromatic propellant are mixed, and the energetic propellant based on magnesium-nickel-based metal hydride mixing is obtained. The characteristic that metal hydride can release hydrogen in a high-temperature environment is utilized, and the release rate of hydrogen energy is regulated and controlled through the size and the proportion, so that the combustion characteristic of propellant powder and the chamber pressure of an inner trajectory during artillery launching are changed, and finally the kinetic energy of a gun muzzle is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of propellants for barreled weapons, and particularly relates to an energetic propellant based on the blending of magnesium-nickel-based metal hydrides, a preparation method thereof, and applications thereof. Background Art

[0002] Energetic propellants are applied to various barreled weapon systems of the army, navy, and air force. They are the energy for launching and propulsion and an important guarantee for the weapon's lethality. With the improvement of science and technology and the level of weapon equipment, higher requirements are put forward for the performance of energetic propellants. The energy of the propellant directly affects the flight speed of the projectile, thereby affecting the range of the weapon; the combustion performance of the gunpowder directly affects the regularity of the release of gunpowder gas, and further affects the energy provided by the gunpowder, determining the muzzle velocity of the projectile. Therefore, how to improve the energy of the propellant and make it have good comprehensive performance has important military application value. Introducing high-energy additives such as micron and nano aluminum high-energy particles, boron fuels, and other metal particles into the propellant can increase the energy of the propellant system, but these materials still have problems such as insufficient reaction completeness, high ignition temperature, and insufficient long-term storage performance.

[0003] Hydrogen energy is the new energy with the most development potential in the 21st century, with a calorific value as high as 142 kJ / g. Using hydrogen storage materials to store hydrogen in a solid state provides a safe and efficient hydrogen storage method. Although hydrogen storage materials cannot be directly used as propellants, they can be used as high-energy media to introduce hydrogen into the propellant in a solid state to improve the energy output structure of the propellant system. The hydrogen small molecule gas and metal particles generated after the thermal decomposition of hydrogen storage materials have strong reaction activity and high combustion calorific values (such as 25 and 30 kJ / g for Mg and Al respectively), which can greatly improve the combustion efficiency and reaction completeness of the system. Moreover, the equilibrium pressure of the hydrogen released by the hydrogen storage material increases exponentially with the increase of temperature, and a chamber pressure of up to several hundred megapascals will be generated under high-temperature conditions. Magnesium-nickel-based alloy hydrides have the advantages of high hydrogen storage capacity, rich resources, and low price, and are very promising high-energy additives for propellants, which have important value for realizing the above applications.

[0004] According to the differences in the interaction mechanisms between solid materials and hydrogen elements, hydrogen storage materials can be classified into two major categories: physical adsorption hydrogen storage materials and chemical adsorption hydrogen storage materials. Physical adsorption hydrogen storage materials include carbon nanotubes, activated carbon, zeolite compounds, metal-organic framework compounds (MOFs), and polymers of intrinsic microporosity (PIMs). Such materials mainly rely on the dispersion force between hydrogen molecules and adsorbents to store hydrogen at normal temperature and high pressure or at low temperature. Their usage conditions are not suitable for the propellant system and it is difficult to meet the requirements of propellants for fuel stability. Chemical adsorption hydrogen storage materials utilize the chemical interaction between hydrogen elements and other elements to store hydrogen, including metal hydrides, coordination hydrides (borohydrides, aluminum hydrides, nitrogen hydrides), ammonia borane and its derivatives. Such materials have a large hydrogen storage capacity, and the hydrogen absorption and desorption rates and reaction performance can be regulated through material structure design. As a propellant additive, it has broad application prospects.

[0005] Compared with hydrogen storage materials such as carbon-based materials, magnesium-nickel-based alloy hydrides have a high hydrogen storage capacity, wide sources, and low prices. Compared with boron-based and aluminum-based hydrogen storage materials, the combustion residues are less and in a powder state, with little erosion to the inner bore of the gun barrel, and can be ejected with the propellant gas in the gun barrel, making them more suitable as high-energy fuel additives in gun propellants.

[0006] Starting from regulating the thermodynamic nature and kinetic characteristics of hydrogen absorption and desorption of materials, the methods to improve the hydrogen storage performance of magnesium-nickel-based alloy hydrides mainly include element substitution, composite system construction, catalytic doping, spatial confinement, and surface modification. For example, element substitution can change the intrinsic microstructure of the material by forming solid solutions and multi-component alloys, thereby effectively improving the thermodynamic and kinetic properties of hydrogen absorption and desorption of the material. The addition of catalysts can significantly accelerate the dissociation and diffusion of hydrogen molecules. Commonly used catalysts include transition metals, metal oxides, sulfides, and carbon-based materials. By constructing a composite system with other hydrogen storage materials, the hydrogen absorption and desorption path can be changed, thereby playing a role in regulating thermodynamic properties.

[0007] The preparation process of magnesium-nickel-based alloy hydrides is simple, safe and reliable, and the cost is low. It has a high hydrogen storage capacity (about 6wt%), and the hydrogen desorption temperature and pressure can be adjusted and controlled. Its performance has reached the international advanced level. Introducing it into propellants can greatly improve the energy density of propellants. Summary of the Invention

[0008] In view of this, in response to the urgent need for high-energy propellants in various barrel weapon systems of the army, navy and air force, through research on the hydrogen liberation and combustion characteristics of magnesium-nickel-based alloy hydrides, the combustion characteristics of magnesium-nickel-based alloy hydrides blended with propellants, the compatibility and safety of magnesium-nickel-based alloy hydrides and propellants, etc., by coating magnesium-nickel-based metal hydrides with graphene and effectively and safely blending them with single-aromatic propellants, a new energetic propellant based on the blending of magnesium-nickel-based metal hydrides is provided, which realizes the improvement of the combustion performance and muzzle kinetic energy of the propellant on the premise of meeting the requirements of compatibility and safety with conventional propellants.

[0009] The technical object of the present invention is achieved by the following technical solutions.

[0010] On the one hand, the present invention provides a preparation method of an energetic propellant based on the blending of magnesium-nickel-based metal hydrides, which is characterized by including the following steps:

[0011] S1: Using metallic Mg and Ni elements as raw materials, preparing magnesium-nickel-based metal alloy powder by mechanical alloying method;

[0012] S2: Performing hydrogenation treatment on the magnesium-nickel-based metal alloy powder to obtain magnesium-nickel-based metal hydride;

[0013] S3: Coating the magnesium-nickel-based metal hydride with graphene, and blending it with single-aromatic propellant by mechanical ball milling to obtain the energetic propellant based on the blending of magnesium-nickel-based metal hydrides.

[0014] Further, in step S1, the Mg and Ni are elemental powders, and the metal molar ratio is 2:1.

[0015] Further, in step S3, the mass ratio of graphene-coated magnesium-nickel-based metal hydride to single-aromatic propellant is 1:3.

[0016] Further, in step S1, the mechanical alloying method uses a planetary ball mill.

[0017] Further, in step S1, the planetary ball mill uses a stainless steel tank.

[0018] Further, in step S2, the graphene is prepared by a carbothermal reduction method using high-purity graphite and an oxidant as raw materials.

[0019] Further, in step 3, the graphene-coated magnesium-nickel-based metal hydride and single-aromatic propellant are used to prepare the energetic propellant based on the blending of magnesium-nickel-based metal hydrides by a shaped powder pressing method.

[0020] Further, in step S3, first prepare a high-polymer binder solution, then uniformly mix the graphene-coated magnesium-nickel-based metal hydride and the mono-aromatic propellant components, add the mixture to the binder solution at a certain temperature, stir and heat up to volatilize the solvent, so that the binder coats the surface of the energetic propellant grains admixed with the magnesium-nickel-based metal hydride, and dry to prepare the shaped powder.

[0021] On the other hand, the present invention also provides an energetic propellant based on magnesium-nickel-based metal hydride admixed prepared by using the above preparation method.

[0022] On yet another aspect, the present invention further provides an application of the energetic propellant based on magnesium-nickel-based metal hydride admixed, which is carried out according to the following steps: first, load the energetic propellant based on magnesium-nickel-based metal hydride admixed into a 100 ml high-pressure closed bomb; then detect the time-pressure curve of the energetic propellant based on magnesium-nickel-based metal hydride admixed in the closed bomb through a GEN3 data acquisition system and a Kistler 6213 type piezoelectric crystal sensor, so as to guide the interior ballistic launching performance and muzzle kinetic energy of the gun.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] Based on the hydrogen energy interior ballistic launching technology, the present invention adjusts the components of the propellant, constructs a new launching technology by means of admixing magnesium-nickel-based metal hydride to change the combustion performance of the propellant, makes full use of the principle that metal hydride can release hydrogen at high temperature, generates a large amount of heat through the combustion of high-pressure hydrogen-oxygen gas, causes the expansion work of excess hydrogen and other gas mixtures, and promotes the projectile to accelerate in the bore, so as to obtain an extremely high initial velocity. By utilizing the characteristics of low molecular weight, small acoustic inertia and large escape velocity of hydrogen, it is possible to break through the initial velocity limitation of traditional gun launching by maintaining the high pressure at the bottom of the projectile and achieve ultra-high speed launching. Description of the Drawings

[0025] Figure 1 is the residual diagram after the energetic propellant based on magnesium-nickel-based metal hydride admixed provided by the embodiment of the present invention is ignited.

[0026] Figure 2 is the p-t curve diagram of the energetic propellant of magnesium-nickel-based metal hydride admixed with mono-aromatic propellant provided by the embodiment of the present invention.

[0027] Figure 3 is the p-t curve diagram of the energetic propellant of aluminum-based metal hydride admixed with mono-aromatic propellant provided by the comparative example of the present invention.

[0028] Figure 4 is the p-t curve diagram of the energetic propellant of titanium-based metal hydride admixed with mono-aromatic propellant provided by the comparative example of the present invention. Detailed implementation manners

[0029] This application targets at lightweight and high-capacity magnesium-nickel-based binary metal hydrides, studies the effects of their composition and structure on the characteristics of hydrogen release by thermal decomposition under high temperature and high pressure and combustion performance, clarifies the interaction mechanism between magnesium-nickel-based metal hydrides (and those after further catalytic and composite modification) and propellants, studies the regulation rules of the changes in conditions such as ambient temperature and humidity and surface treatment on the stability and safety of magnesium-nickel-based metal hydrides and propellants, and develops magnesium-nickel-based metal hydrides with excellent comprehensive performance and high-energy solid propellant samples admixed therewith.

[0030] The combustion system based on the ignition of propellants in this invention is a multiphase system. By utilizing the hydrogen release of metal hydrides upon heating, the hydrogen release and combustion reaction occur at the gas-liquid-solid three-phase interface of hydrogen, water and metal hydrides. The interaction ability of the three-phase interface can be enhanced and the hydrogen release rate can be changed through interface modification means to optimize the chamber pressure of the interior ballistics, thereby increasing the muzzle kinetic energy and enabling the projectile to obtain a high muzzle velocity.

[0031] In order to make the objectives, technical solutions and advantages of this invention clearer and more understandable, the following further details this invention in combination with embodiments. The specific embodiments described herein are only used to explain this invention and are not used to limit this invention. Modifications or equivalent replacements made on the basis of the technical solutions of this invention without departing from the spirit and scope of the technical solutions of this invention shall all be covered within the protection scope of this invention.

[0032] A preparation method of an energetic propellant admixed with magnesium-nickel-based metal hydrides includes the following steps:

[0033] Step 1: Using metallic Mg and Ni as raw materials, adopting the mechanical alloying method, adding them into a stainless-steel ball milling tank at a molar ratio of Mg to Ni of 2:1, and respectively ball milling for 40 h, 60 h and 80 h in total by a planetary ball mill at a rotation speed of 500 r / min to obtain magnesium-nickel-based metal alloy powders.

[0034] Step 2: Performing hydrogenation treatment on the magnesium-nickel-based metal alloy powders to obtain magnesium-nickel-based metal hydrides.

[0035] Step 3: Coating the magnesium-nickel-based metal hydrides with graphene and mechanically ball milling them to admix them with single-base propellants in a certain ratio to obtain the energetic propellant admixed with magnesium-nickel-based metal hydrides.

[0036] The Mg and Ni are elemental powders; the mechanical alloying method adopts a planetary ball mill.

[0037] The molar ratio of Mg to Ni is 2:1 or 2:0.5 - 1.5; preferably, the molar ratio of Mg to Ni is 2:1.

[0038] The planetary ball mill uses a stainless-steel tank with a volume of 100 mL. There are two air valves on the lid for vacuum pumping and filling with protective gas.

[0039] The magnesium-nickel-based metal hydride and graphene are magnetically stirred and mixed to prepare the graphene-coated magnesium-nickel-based metal hydride. Based on the amount of 5 g of graphene added, magnesium-nickel-based metal hydride is added to a 500 mL beaker according to the mass ratios of high-purity graphite to magnesium-nickel-based metal hydride of 1:0.05, 1:0.1, 1:0.15, 1:0.20, 1:0.25, 1:0.30, and 1:0.40, etc. Preferably, the mass ratio of graphene to magnesium-nickel-based metal hydride is 1:0.40. 20 mL of ethanol is added to each of the above beakers and magnetically stirred for 10 min. 5 g of high-purity graphene is weighed separately with an electronic balance into the above 500 mL beakers, and then 30 mL of ethanol is added. It is placed on a magnetic stirrer and stirred at room temperature for 24 h to make it evenly stirred. The above liquid is magnetically stirred and heated at a constant temperature of 80 °C to evaporate the water until the sample becomes viscous. The viscous sample is placed in an oven and pretreated at a temperature of 80 °C for 3 h until it is completely dry.

[0040] The graphene-coated magnesium-nickel-based metal hydride and single-aromatic propellant are used to prepare an energetic propellant doped with magnesium-nickel-based metal hydride by the method of pressing shaped powder.

[0041] In the doping process, a high-polymer binder solution is first prepared, and then 4 - 6 g of graphene-coated magnesium-nickel-based metal hydride and 3 - 24 g of traditional single-aromatic propellant components are mixed evenly. The mixture is added to the rubber binder solution at 60 °C, and the solvent is volatilized by stirring and heating, and the binder is coated on the surface of the energetic propellant particles doped with magnesium-nickel-based metal hydride, and then dried to prepare shaped powder.

[0042] Example 1

[0043] Preparation of Energetic Propellant Doped with Magnesium-Nickel-Based Metal Hydride and Single-Aromatic Propellant

[0044] Elemental powders of Mg and Ni are added to a stainless-steel ball-milling tank at a metal molar ratio of 2:1. The alloy powder is obtained by cumulative ball milling for 40 h, 60 h, and 80 h respectively at a speed of 500 r / min by a planetary ball mill. The prepared alloy powder is transferred to a sample tube and connected and assembled with a pressure-temperature control test system, and then airtightness detection is carried out to ensure that the system is isolated from the outside air and external factors are excluded. Then hydrogen is slowly introduced into the system until the high-pressure gauge shows a value of about 4 MPa. Then the heating program is set, the heating switch is turned on, and the temperature environment where the sample tube is located is raised from room temperature to 673 K and maintained at 673 K for 40 h to obtain magnesium-nickel-based alloy hydride.

[0045] The graphene is prepared from high-purity graphite and an oxidant (air or hydrogen peroxide). Take an appropriate amount of high-purity graphite raw material and dry it at a constant temperature of 80 °C in an oven for 24 h to remove the moisture in the graphite raw material; accurately weigh 10 g of high-purity graphite powder with an electronic balance, spread it evenly in a porcelain bowl, and cover it with another porcelain bowl; at room temperature, place the above porcelain bowls in a muffle furnace respectively, and carry out constant-temperature sintering at 150 °C, 200 °C, 250 °C, 300 °C, 350 °C, 400 °C and 450 °C for 4 h respectively; after the samples are cooled to room temperature, take them out, grind them evenly with an agate mortar respectively, and then pass through a 200-mesh sieve to obtain uniform graphene.

[0046] The magnesium-nickel-based metal hydride and graphene are magnetically stirred and mixed to prepare the graphene-coated magnesium-nickel-based metal hydride. Based on the amount of 5 g of graphene added, add magnesium-nickel-based metal hydride to a 500 mL beaker according to the mass ratios of high-purity graphite to magnesium-nickel-based metal hydride of 1:0.05, 1:0.1, 1:0.15, 1:0.20, 1:0.25, 1:0.30 and 1:0.40 respectively. Preferably, the mass ratio of graphene to magnesium-nickel-based metal hydride is 1:0.40; add graphene and magnesium-nickel-based metal hydride to a 500 mL beaker according to a mass ratio of 1:0.4. Add 20 mL of ethanol to the beaker and stir magnetically for 10 min; then weigh 5 g of graphene and add it to the beaker, add another 30 mL of ethanol, place it on a magnetic stirrer, and stir at room temperature for 24 h to make it evenly stirred. After the water evaporates, dry the sample to obtain the graphene-passivated coated magnesium-nickel-based metal hydride.

[0047] Respectively mix 4 g and 6 g of the graphene-coated magnesium-nickel-based metal hydride with 32.1 g of the traditional single-aromatic propellant components produced by the State-owned No. 255 Factory evenly. Add the mixture to the rubber binder solution at 60 °C, stir and heat up to volatilize the solvent, and the binder coats the surface of the energetic propellant particles doped with the magnesium-nickel-based metal hydride. Dry and compact to form the energetic propellant of the magnesium-nickel-based metal hydride-doped single-aromatic propellant. The p-t curve of the reaction of the prepared energetic propellant of the magnesium-nickel-based metal hydride-doped single-aromatic propellant in a closed bomb is as Figure 2 shown.

[0048] Comparative Example 1

[0049] Preparation of the energetic propellant of the aluminum-based metal hydride-doped single-aromatic propellant

[0050] Al and Ni elemental powders were added to a stainless - steel ball - milling tank at a metal molar ratio of 2:1, and alloy powders were obtained by planetary ball - milling at a rotational speed of 500 r / min for 40 h, 60 h, and 80 h respectively. The prepared alloy powders were transferred to a sample tube and connected and assembled with a pressure - temperature control test system. Subsequently, airtightness detection was carried out to ensure that the system was isolated from the outside air and external factors were excluded. Then, hydrogen was slowly introduced into the system until the high - pressure gauge showed about 4 MPa. Then, a heating program was set, and the heating switch was turned on to raise the temperature environment where the sample tube was located from room temperature to 673 K and maintain it at 673 K for 40 h to obtain an aluminum - based alloy hydride.

[0051] An appropriate amount of high - purity graphite raw material was dried at a constant temperature of 80 °C in an oven for 24 h to remove the moisture in the graphite raw material. 10 g of high - purity graphite powder was accurately weighed with an electronic balance and evenly spread in a porcelain bowl, and then covered with another porcelain bowl. At room temperature, the above - mentioned porcelain bowls were respectively placed in a muffle furnace and sintered at a constant temperature of 150 °C, 200 °C, 250 °C, 300 °C, 350 °C, 400 °C, and 450 °C for 4 h. After the samples were cooled to room temperature, they were taken out, ground evenly with an agate mortar, and then passed through a 200 - mesh sieve to obtain uniform graphene. Graphene and aluminum - based metal hydride were added to a 500 - mL beaker at a mass ratio of 1:0.4. 20 mL of ethanol was added to the beaker, and magnetic stirring was carried out for 10 min; then 5 g of graphene was weighed and added to the beaker, and another 30 mL of ethanol was added. The mixture was placed on a magnetic stirrer and stirred at room temperature for 24 h to make it evenly stirred. After the water evaporated, the sample was dried to obtain graphene - passivated coated aluminum - based metal hydride.

[0052] 4 g and 6 g of graphene - coated aluminum - based metal hydride were respectively mixed evenly with 19 g of traditional single - aromatic propellant components produced by the 255th State - owned Factory. The mixture was added to a rubber binder solution at 60 °C, and the solvent was volatilized by stirring and heating, and the binder was coated on the surface of the energetic propellant particles doped with aluminum - based metal hydride. After drying and compaction, an energetic propellant doped with aluminum - based metal hydride and single - aromatic propellant was obtained. The p - t curve of the energetic propellant doped with aluminum - based metal hydride and single - aromatic propellant reacting in a closed bomb is as Figure 3 shown.

[0053] Comparative Example 2

[0054] Preparation of an energetic propellant doped with titanium - based metal hydride and traditional single - aromatic propellant

[0055] The elemental powders of Ti and Ni were added to a stainless-steel ball milling tank at a metal molar ratio of 2:1. The alloy powders were obtained by planetary ball milling at a rotational speed of 500 r / min for 40 h, 60 h, and 80 h respectively. The prepared alloy powders were transferred to a sample tube and connected and assembled with a pressure and temperature control test system. Subsequently, an airtightness test was carried out to ensure that the system was isolated from the outside air and external factors were excluded. Then, hydrogen was slowly introduced into the system until the high-pressure gauge showed a value of about 4 MPa. Then, a heating program was set, and the heating switch was turned on to raise the temperature environment of the sample tube from room temperature to 673 K and maintain it at 673 K for 40 h to obtain a titanium-based alloy hydride.

[0056] An appropriate amount of high-purity graphite raw material was dried at a constant temperature of 80 °C in an oven for 24 h to remove the moisture in the graphite raw material. 10 g of high-purity graphite powder was accurately weighed with an electronic balance and evenly spread in a porcelain bowl, and then covered with another porcelain bowl. At room temperature, the above porcelain bowls were respectively placed in a muffle furnace and sintered at a constant temperature of 150 °C, 200 °C, 250 °C, 300 °C, 350 °C, 400 °C, and 450 °C for 4 h. After the samples were cooled to room temperature, they were taken out, ground evenly with an agate mortar, and then passed through a 200-mesh sieve to obtain uniform graphene. The graphene and the titanium-based metal hydride were added to a 500 mL beaker at a mass ratio of 1:0.4. 20 mL of ethanol was added to the beaker, and magnetic stirring was carried out for 10 min. Then, 5 g of graphene was weighed and added to the beaker, and another 30 mL of ethanol was added. The mixture was placed on a magnetic stirrer and stirred at room temperature for 24 h to make it evenly stirred. After the water evaporated, the sample was dried to obtain a graphene-passivated coated titanium-based metal hydride.

[0057] 3 g and 4 g of the graphene-coated titanium-based metal hydride were respectively mixed evenly with 3.7 g of the traditional single-aromatic propellant components. The mixture was added to a rubber binder solution at 60 °C, and the solvent was volatilized by stirring and heating. The binder was coated on the surface of the energetic propellant particles doped with the titanium-based metal hydride, and then dried and compacted to form an energetic propellant doped with the titanium-based metal hydride and the traditional single-aromatic propellant. The p-t curve of the energetic propellant doped with the titanium-based metal hydride and the traditional single-aromatic propellant in a closed bomb is as Figure 4 shown.

[0058] In summary, it can be concluded that the energetic propellant doped with the magnesium-nickel-based metal hydride and the single-aromatic propellant of the present invention has the following beneficial effects:

[0059] First, the present invention proposes an energetic propellant doped with the magnesium-nickel-based metal hydride and the single-aromatic propellant, and its preparation method and application. The high-combustion heat-value magnesium-nickel-based metal hydride effectively utilizes the characteristic of the metal hydride releasing hydrogen when heated, and realizes the characteristics of low molecular weight, low acoustic inertia, and large escape velocity of the energetic propellant to maintain a high pressure at the bottom of the projectile, and the energy characteristics formed by combustion are reflected by pressure.

[0060] Second, the energetic propellant of magnesium-nickel-based metal hydride blended with mono-aromatic propellant proposed by the present invention achieves surface passivation of the metal hydride through graphene coating, preventing it from deactivating due to self-oxidation-reduction reaction with the mono-aromatic propellant during the blending process.

[0061] Third, the energetic propellant of magnesium-nickel-based metal hydride blended with mono-aromatic propellant proposed by the present invention can achieve a higher chamber pressure than traditional propellants, breaking through the initial velocity limitation of traditional artillery firing and thus achieving ultra-high-speed firing.

[0062] It should be noted that the above-described embodiments are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several modifications, improvements, and equivalent substitutions can be made to the present invention, and these modifications, improvements, and equivalent substitutions are also considered to fall within the protection scope of the claims of the present invention.

Claims

1. A preparation method of an energetic propellant based on the blending of magnesium-nickel-based metal hydride, characterized in that, It includes the following steps: S1: Using metallic Mg and Ni as raw materials, preparing magnesium-nickel-based metal alloy powder by mechanical alloying method; S2: Carrying out hydrogenation treatment on the magnesium-nickel-based metal alloy powder to obtain magnesium-nickel-based metal hydride; S3: Coating the magnesium-nickel-based metal hydride with graphene, and mixing it with single aromatic propellant by mechanical ball milling to obtain the energetic propellant based on the blending of magnesium-nickel-based metal hydride.

2. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, characterized in that, In step S1, the Mg and Ni are elemental powders, and the metal molar ratio is 2:

1.

3. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, characterized in that, In step S3, the mass ratio of the graphene-coated magnesium-nickel-based metal hydride to the single aromatic propellant is 1:

3.

4. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, characterized in that, In step S1, the mechanical alloying method uses a planetary ball mill.

5. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 4, characterized in that, In step S1, the planetary ball mill uses a stainless steel tank.

6. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, wherein, In step S2, the graphene is prepared by carbothermal reduction method using high-purity graphite and an oxidant as raw materials.

7. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, characterized in that, In step S3, the graphene-coated magnesium-nickel-based metal hydride and the single aromatic propellant are used to prepare the energetic propellant based on the blending of magnesium-nickel-based metal hydride by the shaped powder pressing method.

8. The preparation method of the energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, characterized in that, In step S3, first prepare a polymer binder solution, then mix the graphene-coated magnesium-nickel-based metal hydride and the single aromatic propellant components evenly, add the mixture to the binder solution at a certain temperature, stir and heat up to volatilize the solvent, and the binder coats the surface of the energetic propellant particles based on the blending of magnesium-nickel-based metal hydride, and then dry it to prepare the shaped powder.

9. An energetic propellant based on the blending of magnesium-nickel-based metal hydride prepared by using the preparation method according to any one of claims 1-8.

10. An application of an energetic propellant based on the blending of magnesium-nickel-based metal hydride according to claim 1, characterized in that, It is carried out according to the following steps. First, load the energetic propellant based on the blending of magnesium-nickel-based metal hydride into a 100 ml high-pressure closed bomb; then detect the time-pressure curve of the energetic propellant based on the blending of magnesium-nickel-based metal hydride in the closed bomb through a GEN3 data acquisition system and a Kistler 6213 piezoelectric crystal sensor, which is used to guide the interior ballistic launch performance and muzzle kinetic energy of the artillery.

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