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Amorphous refractory metal alloy ablation-resistant coating and preparation method and application thereof

A refractory metal, anti-ablation technology, applied in metal material coating process, coating, vacuum evaporation coating and other directions, can solve the problems of deterioration of mechanical properties of gun steel, insufficient wear resistance of coating, high heating temperature, etc. , to improve the service life of components, improve the anti-ablation effect, and reduce the effect of falling off

Pending Publication Date: 2022-06-24
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only a single-phase α-Ta coating requires a higher heating temperature during the deposition process, which deteriorates the mechanical properties of gun steel
At the same time, the hardness of Ta is low, even lower than the hardness of gun steel substrate, which will lead to insufficient wear resistance of Ta coating.

Method used

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  • Amorphous refractory metal alloy ablation-resistant coating and preparation method and application thereof
  • Amorphous refractory metal alloy ablation-resistant coating and preparation method and application thereof
  • Amorphous refractory metal alloy ablation-resistant coating and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0034] The present embodiment provides a method for preparing an amorphous refractory metal alloy anti-ablation coating, which is prepared by the following methods:

[0035] (1) Target preparation: Cr metal powders are weighed by a certain weight, and a single metal material prepared by vacuum smelting is used as a target for magnetron sputtering, that is, a Cr target; Ta metal powder is weighed according to a certain weight The weight is weighed, and the single metal material prepared by the powder metallurgy method is used as the target material of magnetron sputtering, that is, the Ta target material.

[0036] (2) Substrate pretreatment: take gun steel PCrNi3MoVA as the substrate, and use #240, #600, #1000, #1500, #2000 sandpaper to polish and polish the surface of the substrate, and then use acetone, alcohol and deionized water respectively. Ultrasonic cleaning, blow dry.

[0037] (3) Deposition of anti-ablation coating of amorphous refractory metal alloy: magnetron sputt...

Embodiment 2

[0039] This embodiment provides a method for preparing an amorphous refractory metal alloy anti-ablation coating, which is different from Embodiment 1 only in that in step (3), the process parameters for coating deposition are: background vacuum degree 3×10 -3 Pa, the substrate temperature is 350°C, the Cr target uses a DC power supply with a power of 40W, the Ta target uses a radio frequency power supply with a power of 100W, the substrate DC bias voltage is -80V, the target-base distance is 6cm, the working pressure is 0.3Pa, and the argon flow rate is 20sccm, by controlling the sputtering time to 4h to achieve a thickness of about 3μm, the anti-ablation coating Ta containing amorphous refractory metal alloy is obtained 41.7 Cr 58.3 (the lower corner is the atomic percent of the element) material.

Embodiment 3

[0041] The present embodiment provides a method for preparing an amorphous refractory metal alloy anti-ablation coating, which differs from Embodiment 1 only in that:

[0042] In step (3), the process parameters of coating deposition are: background vacuum degree 1×10 -3 Pa, the substrate temperature is 350°C, the Cr target uses a DC power supply with a power of 20W, the Ta target uses a radio frequency power supply with a power of 90W, the substrate DC bias voltage is -80V, the target-base distance is 6cm, the working pressure is 0.3Pa, and the argon flow rate is 20sccm, by controlling the sputtering time to 6h to achieve a thickness of about 4.5μm, to obtain an anti-ablation coating containing amorphous refractory metal alloy Ta 75 Cr 25 (the lower corner is the atomic percent of the element) material.

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Abstract

The invention relates to the technical field of coating preparation, in particular to an amorphous refractory metal alloy ablation-resistant coating and a preparation method and application thereof. High-purity Cr and high-purity Ta are prepared into a pure Cr elementary substance metal target material and a pure Ta elementary substance metal target material correspondingly, a vacuum magnetron sputtering technology is adopted for implementing a double-target-material co-sputtering mode, the amorphous refractory metal alloy anti-ablation coating is formed on the surface of a gun steel base body, and the amorphous refractory metal alloy anti-ablation coating comprises Ta, Cr, Ta, Ta and Ta. The atomic percent of Cr is 30-70%, and the atomic percent of Ta is 30-70%. The amorphous refractory metal alloy ablation-resistant coating has good binding force and matching performance with a base body, can effectively resist ablation of high-temperature gunpowder gas, meanwhile reduces falling of the coating on the surface of the base body, can be applied to the field of gunpowder launching military equipment, and has good application prospects. Theoretical and technical support is provided for prolonging the service life of components and prolonging the service life of artillery barrels.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to an amorphous refractory metal alloy anti-ablation coating and a preparation method and application thereof. Background technique [0002] Artillery is an extremely important firearm military equipment used by the two armies in the modern battlefield. Artillery refers to a barrel weapon with a caliber of more than 20mm that generates energy to project projectiles through the reaction of propellant. The barrel is the most valuable component of an artillery. Countries have been working on improving the performance of artillery in order to obtain longer range, shorter firing interval, more precise strike and greater damage power. Therefore, more and more new high-energy powders are used as propellants for artillery. Although the combustion of the new high-energy propellant provides a greater initial velocity for the projectile, it causes the key components of the artill...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/16C22C45/10F41A21/22
CPCC23C14/352C23C14/165C23C14/345C22C45/10F41A21/22
Inventor 柳泉郭策安岳明凯李彩燕金浩张伟强张健
Owner SHENYANG LIGONG UNIV
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