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Fire-resistant oxidation resistant material and preparation method thereof

A technology of anti-oxidation and high temperature resistance, applied in metal material coating process, superimposed layer plating, coating and other directions, can solve the problems of volatile, components can not play a protective role, etc., to achieve easy operation, process parameter control The effect of wide range and dense material surface structure

Inactive Publication Date: 2009-07-08
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, volatile molybdenum trioxide is easy to form on the surface in a high temperature environment, which cannot protect the components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh the molten salt as the medium according to the molar ratio of NaCl:KCl:NaF of 1:1:3, powdered SiO 2 The addition amount accounts for 10% of the mass percentage of molten salt medium. Mix the above four substances, put them into a crucible, put them into an electric furnace and raise the temperature to 850°C, hold the temperature for 10 minutes, put them into the cathode of a Mo plate, and pulse power with an average current density of 900A cm -2 Under certain conditions, after 120 minutes of deposition, take out the Mo plate, boil it in hot water for 5 minutes to 10 minutes, and use ultrasonic cleaning to remove the residual molten salt on the surface of the sample, and then obtain a high temperature resistant and oxidation resistant structural material. The surface morphology, section thickness and content distribution of the deposited layer, and the analysis results of section X-ray diffraction show that the surface of the obtained sample is dense and flat, and ...

Embodiment 2

[0024] Weigh the molten salt as the medium according to the molar ratio of NaCl:KCl:NaF of 1:1:3, powdered SiO 2 The addition amount accounts for 15% of the mass percentage of molten salt medium. Mix the above four substances, put them into a crucible, put them into an electric furnace and raise the temperature to 950°C, keep the temperature for 15 minutes, put them into the Mo plate cathode, and pulse power with an average current density of 1200A cm -2 Under certain conditions, after 180 minutes of deposition, take out the Mo rod, boil it in hot water for 5 minutes to 10 minutes, and use ultrasonic cleaning to remove the residual molten salt on the surface of the sample to obtain a high temperature resistant and anti-oxidation structural material. The surface morphology, section thickness and content distribution of the deposited layer, and the results of section X-ray diffraction analysis show that the surface of the obtained sample is dense and flat, and the thickness of t...

Embodiment 3

[0026] Weigh the molten salt as the medium according to the molar ratio of NaCl:KCl:NaF of 1:1:3, powdered SiO 2 The addition amount accounts for 12% of the mass percentage of molten salt medium. Mix the above four substances evenly, put them into a crucible, put them into an electric furnace and raise the temperature to 900°C, keep the temperature for 20min, put in the Mo rod cathode, pulse power supply and the average current density is 1100A cm -2 Under certain conditions, after 150 minutes of deposition, take out the Mo rod, boil it in hot water for 5 minutes to 10 minutes, and use ultrasonic cleaning to remove the residual molten salt on the surface of the sample to obtain a high temperature resistant and oxidation resistant structural material. The surface morphology, section thickness and content distribution of the deposited layer, and the results of section X-ray diffraction analysis show that the surface of the obtained sample is dense and smooth, and the thickness o...

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Abstract

A high-temperature-resistant and anti-oxidation material and a preparation method thereof belong to the technical field of metallurgical materials and are used to solve the problems of improving the mechanical properties and oxidation resistance of high-temperature working materials. The special feature is that it uses metal Mo as the matrix, and the outer layer of the matrix is ​​a gradient distribution layer with gradually increasing Si content. The change rule of the phase composition of the material from the inside to the outside is: Mo→Mo5Si3+Mo3Si+Mo→Mo5Si3+MoSi2→MoSi2 →MoSi2+Si→Si. After inspection, the bending strength and high temperature creep strength of the material at a high temperature of 1600°C are basically equivalent to metal molybdenum, and it does not oxidize in high temperature air at 1200°C to 1600°C. The method of the invention uses silicon electrodeposited by molten salt as the silicon source for silicon infiltration, and the electrodeposited silicon and silicon are diffused in the molybdenum matrix at the same time, and the thickness of the gradient layer is easy to control, the range of process parameters is wide, easy to operate, and the surface structure of the material is dense. , flat and other characteristics.

Description

technical field [0001] The present invention relates to a kind of metal material and its preparation method, especially Mo—MoSi 2 A high-temperature-resistant and anti-oxidation material and a preparation method thereof belong to the technical field of metallurgical materials. Background technique [0002] High-temperature structural materials require high strength, creep resistance, good fracture toughness, oxidation resistance, and stable structural properties. The types mainly include silicon-based ceramics, carbon materials, intermetallic aluminides, nickel-based alloys, silicides, and molybdenum metals. Wait. [0003] Silicon-based ceramics such as Si 3 N 4 SiC not only has the hard, wear-resistant and corrosion-resistant properties of general ceramic materials, but also has high mechanical strength, good thermal stability, small friction coefficient, self-lubrication, good electrical insulation, radiation resistance and excellent oxidation resistance. , can be used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F15/00B32B5/14C23C28/00C25D3/66C23C10/24
Inventor 李运刚李智慧何小凤张士宪田薇
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY