Molybdenum base composite material with composite oxidation resistant coating, and preparation method thereof

An anti-oxidation coating and composite material technology, applied in the coating, metal material coating process and other directions, can solve the problems of poor high-temperature oxidation resistance and poor high-temperature oxidation resistance of protective coatings, and achieve good anti-oxidation performance, The effect of increasing the density and improving the high temperature oxidation resistance

Active Publication Date: 2019-03-29
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a molybdenum-based composite material with a composite anti-oxidation coating, to solve the problem of poor high-temperature oxidation resistance of the protective coating prepared by the e

Method used

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  • Molybdenum base composite material with composite oxidation resistant coating, and preparation method thereof
  • Molybdenum base composite material with composite oxidation resistant coating, and preparation method thereof
  • Molybdenum base composite material with composite oxidation resistant coating, and preparation method thereof

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preparation example Construction

[0032] The reactions that may occur during the preparation of the molybdenum silicon compound coating are as follows:

[0033] 2NaF+Si=2Na+SiF 2 (1);

[0034] 2SiF 2 =Si+SiF4 (2);

[0035] 2Si+Mo=MoSi 2 (3);

[0036] SiF 4 +Si=2SiF 2 (4).

[0037] When using the slurry containing barium glass powder to prepare barium glass coating, from the aspect of further improving the bonding effect to barium glass powder, preferably, the organic binder is ethyl cellulose, polyvinyl alcohol, varnish at least one of the From the aspects of bonding effect and simplification of the dosage of the binder, preferably, the dosage of the organic binder is 0.1-3wt% of the mass of the barium glass powder. In order to further improve the dispersion effect of the precursor slurry, preferably, the solvent is at least one of terpineol, toluene, xylene, methanol, water, and ethyl acetate. Further preferably, the organic binder is ethyl cellulose, and the solvent is one of terpineol, toluene...

Embodiment 1

[0042] The molybdenum-based composite material with the composite anti-oxidation coating of the present embodiment comprises a molybdenum alloy substrate and a composite anti-oxidation coating arranged on the surface of the molybdenum alloy substrate, and the molybdenum alloy substrate is Al 2 o 3 Particle reinforced TZM alloy, Al 2 o 3 The mass content in the molybdenum alloy matrix is ​​3%, and the size of the molybdenum alloy matrix is ​​20mm long × 15mm wide × 1mm high; Barium glass coating on the coating surface, the barium glass coating is composed of the following components in mass percentage: SiO 2 37.1%, BaO 42.2%, B 2 o 3 8.5%, ZnO 5.6%, CaO 4.7%, Al 2 o 3 1.9%.

Embodiment 2

[0044] The molybdenum-based composite material with the composite anti-oxidation coating of the present embodiment comprises a molybdenum alloy substrate and a composite anti-oxidation coating arranged on the surface of the molybdenum alloy substrate, and the molybdenum alloy substrate is Al 2 o 3 Particle reinforced TZM alloy, Al 2 o 3 The mass content in the molybdenum alloy matrix is ​​7%, and the size of the molybdenum alloy matrix is ​​20mm long x 15mm wide x 1mm high; Barium glass coating on the coating surface, the barium glass coating is composed of the following components in mass percentage: SiO 2 37.1%, BaO 42.2%, B 2 o 3 8.5%, ZnO 5.6%, CaO 4.7%, Al 2 o 3 1.9%.

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Abstract

The invention relates to a molybdenum base composite material with a composite oxidation resistant coating, and a preparation method thereof. The preparation method of the molybdenum base composite material comprises the steps of arranging a pretreated substrate with a molybdenum silicon compound coating on a molybdenum base composite material substrate; coating sizing agents containing barium glass powder on the surface of the molybdenum silicon compound coating, and performing heat treatment after drying at 500 DEG C-1200 DEG C; and cooling the coating, so that the molybdenum base compositematerial is obtained, wherein the mass content of BaO in the barium glass powder is 40%-45%. According to the method, the sizing agents containing the barium glass powder are coated on the surface ofthe molybdenum silicon compound coating, and a barium glass coating is formed on the surface of the molybdenum silicon compound coating through remelting heat treatment; the composite oxidation resistant coating is formed by the molybdenum silicon compound coating and the barium glass coating, and long-acting oxidation resistance protection of the molybdenum base composite material can be achieved; the composite oxidation resistant coating can be used for preventing gas invasion at high temperature effectively, so that the high temperature oxidation resistance of the molybdenum base compositematerial is improved effectively.

Description

technical field [0001] The invention belongs to the field of molybdenum-based composite materials, and in particular relates to a molybdenum-based composite material with a composite anti-oxidation coating and a preparation method thereof. Background technique [0002] Molybdenum alloy has the characteristics of high melting point, high temperature strength, low high temperature creep rate, good thermal conductivity and electrical conductivity, small thermal expansion coefficient, excellent thermal shock resistance and corrosion resistance. It is widely used in industrial and metal processing industries and other fields. For example, used as flame nozzles and combustion chambers of aero-engines, nose cones and nozzles of spacecraft, ejection seats, high-temperature ablation nozzle linings for rockets; injector nozzles and ballistic coatings for military extended-range rockets, howitzers Layer materials; die-casting molds and extrusion molds for metal processing; used as env...

Claims

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Application Information

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IPC IPC(8): C23C26/00C23G1/10C23G1/20C22C27/04C09D1/00C09D7/61
CPCC09D1/00C22C27/04C23C26/00C23G1/106C23G1/205C09D7/61
Inventor 刘伟李继文曹俊朱鹏飞徐流杰潘昆明张二召张灵杰周玉成魏世忠
Owner HENAN UNIV OF SCI & TECH
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