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Anti-oxidation material and method for preparing tantalum-tungsten alloy anti-oxidation coating by using it

An anti-oxidation coating, tantalum-tungsten alloy technology, applied in the direction of metal material coating process, coating, etc., to achieve the effect of strong anti-oxidation ability under continuous static load

Active Publication Date: 2020-04-17
NINGXIA ORIENT TANTALUM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no coating material that has good compatibility with tantalum-tungsten alloys, a wide range of anti-oxidation working temperature, and excellent anti-oxidation ability in high and low temperature environments.

Method used

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  • Anti-oxidation material and method for preparing tantalum-tungsten alloy anti-oxidation coating by using it
  • Anti-oxidation material and method for preparing tantalum-tungsten alloy anti-oxidation coating by using it
  • Anti-oxidation material and method for preparing tantalum-tungsten alloy anti-oxidation coating by using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Two groups of high-temperature anti-oxidation materials are:

[0053] ①Cr is 5Wt%, Fe is 3Wt%, Ti is 2Wt%, Y 2 o 3 2Wt%, W is 1Wt%, HfO 2 5Wt%, Nb is 3Wt%, SiC is 2.8Wt%, B is 1.2Wt, and the balance is Si;

[0054] ②Mo is 7.2Wt%, W is 2.2Wt%, Nb is 3Wt%, Y is 2Wt%, HfO 2 4wt%, B 2 o 3 is 1.2wt%, BaO is 0.8wt%, Ta is 0.6wt%, and the balance is Si.

[0055] Mix the above two groups of materials evenly in proportion, use a planetary ball mill to grind them into powders of no more than 300 mesh at high speed, and put them into two different containers;

[0056] 2) In the ① group antioxidant material (powder), add respectively the nitro varnish (Hangzhou Paint Co., Ltd., Pagoda brand nitro varnish) of powder quality 80Wt% and the NaF of 3Wt% as binding agent and catalyst, then add powder Ethyl acetate with twice the volume was used as a carrier, mixed evenly, ball milled with corundum beads at a speed of 150r / min for 8h, and then made into a slurry. Coat the slurr...

Embodiment 2

[0068] 1) Two groups of high-temperature anti-oxidation materials are:

[0069] ①Cr is 3Wt%, Ti is 5Wt%, Y 2 o 3 2Wt%, W is 1.5Wt%, Nb is 3Wt%, HfO 2 3wt%, MoSi 2 is 2.5Wt%, S is 1Wt%, and the balance is Si;

[0070] ② Mo is 6.2Wt%, W is 3Wt%, Nb is 3Wt%, Y is 1.8Wt%, HfO 2 4wt%, Al 2 o 3 3.5wt%, B 2 o 3 is 1.2wt%, BaO is 0.8wt%, Ta is 2.2wt%, and the balance is Si.

[0071] Mix the above two groups of materials evenly in proportion, use a planetary ball mill to grind them into powders of no more than 300 mesh at high speed, and put them into different containers;

[0072] 2) Add 120Wt% nitro varnish (Zhejiang Paint Co., Ltd., Pagoda brand nitro varnish) and 3Wt% NH varnish respectively to the ① group antioxidant material 4 Cl was used as a binder and a catalyst, and ethyl acetate twice the volume of the powder was added as a carrier. After mixing evenly, ball milling with corundum beads at a speed of 150r / min for 8 hours was used to make a slurry. Coat the slurry e...

Embodiment 3

[0076] 1) Two groups of high-temperature anti-oxidation materials are:

[0077] ①Cr is 5Wt%, Ti is 2Wt%, Y 2 o 3 2Wt%, W is 0.5Wt%, Nb is 1.8Wt%, HfO 2 3.5wt%, TiB 2 is 0.25Wt%, Ir is 0.5%, and the balance is Si;

[0078] ②Mo is 7.2Wt%, W is 2Wt%, Nb is 2.2Wt%, Y is 1.5Wt%, HfO 2 4Wt%, La 1.2Wt%, B 2 o 3 is 3.7wt%, BaO is 0.8wt%, V is 0.8wt%, and the balance is Si.

[0079] Mix the above two groups of materials evenly in proportion, use a planetary ball mill to grind them into powders of no more than 300 mesh at high speed, and put them into different containers;

[0080] 2) Add polyethylene glycol (Tianjin Kemiou Co., Ltd., analytically pure grade, polyethylene glycol 3000-8000) with a powder mass of 3Wt% to the anti-oxidation material in group ① as a binder, and add 1.2Wt % NH 4 Cl and 1.8wt% NaF were used as catalysts, and ethyl acetate twice the volume of the powder was added as a carrier. After mixing evenly, ball milling with corundum beads at a speed of 180r / mi...

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Abstract

The invention relates to an oxidation-resistant material and a method employing the same for preparing a tantalum-tungsten alloy anti-oxidation coating. The oxidation-resistant material is characterized by comprising a first anti-oxidation material and a second anti-oxidation material, wherein the first anti-oxidation material comprises 1-5wt% of Cr, 1-5wt% of Ti, 0.1-2wt% of Y2O3, 0.5-3wt% of W, 0.5-3wt% of Nb, 1-5wt% of HfO2, and the balance Si; the second anti-oxidation material comprises 6-15wt% of Mo, 0.5-3wt% of W, 0.5-3wt% of Nb, 0.3-2.2wt% of Y, 1-5wt% of HfO2, and the balance Si. The tantalum-tungsten alloy anti-oxidation coating prepared by the method has a wide operating temperature range, and is high in continuous static load and antioxidant capacities, and is particularly suitable for high-temperature structural components such as a thrust chamber, a nozzle jet, a front edge and a guide tube of an airspace engine.

Description

technical field [0001] The invention relates to an anti-oxidation material and a method for preparing an anti-oxidation coating of a tantalum-tungsten alloy by using it. Background technique [0002] Tantalum-tungsten alloy is an important member of the tantalum-based alloy family. Its melting point is as high as 3000°C and has excellent high-temperature mechanical properties. It also has good welding performance and high-temperature creep resistance. It has the potential to become a new generation of high-temperature structural materials for aerospace and aero engines. necessary condition. However, tantalum-tungsten alloys, like C103, TZM and other refractory metal alloy materials, will fail to pulverize due to "pest" oxidation at temperatures above 500 ° C, so anti-oxidation protection must be implemented for them. [0003] Common anti-oxidation protection methods for refractory metal materials include alloying protection and coating protection. Alloying protection can i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C30/00C22C32/00C22C30/00C22C28/00
Inventor 赵刚周小军罗文王立斐韩建川王蓉杜宝盈田进鹏杨国启
Owner NINGXIA ORIENT TANTALUM IND
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