Modified glass material for repairing carbon/carbon composite material SiC coating based on laser cladding method and preparation and use methods

A carbon composite material, laser cladding technology, applied in glass manufacturing equipment, glass furnace equipment, manufacturing tools and other directions, can solve the problems of low absorption rate, difficult to prepare coatings, poor cladding quality, etc., to improve the absorption rate, The effect of improving cladding quality and improving anti-oxidation performance

Active Publication Date: 2021-02-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most industrial selective laser melting (SLM) equipment is equipped with fiber lasers, and the main component of borosilicate glass is oxide, which has a low absorption rate for the laser band covered by fiber lasers. Poor quality, difficult to prepare uniform and dense coating

Method used

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  • Modified glass material for repairing carbon/carbon composite material SiC coating based on laser cladding method and preparation and use methods
  • Modified glass material for repairing carbon/carbon composite material SiC coating based on laser cladding method and preparation and use methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Weigh SiO with a molar percentage of 70% respectively 2 Powder, 20% B 2 o 3 Powder, 9% Al 2 o 3 Powder with 1% Sm 2 o 3 Powder, mixed evenly after ball milling for 3 hours;

[0022] 2) Put the mixed raw material powder into a corundum crucible and place it in a muffle furnace, raise the temperature to 1573K with the furnace in an air atmosphere, and continue heat treatment for 2 hours to fully melt and react the raw material powder at high temperature, and then take it out directly Cool to room temperature to obtain Sm modified borosilicate glass;

[0023] 3) In order to facilitate subsequent repair and use, the Sm-modified borosilicate glass block that has been melted and formed is ground into powder;

[0024] 4) Cladding the damaged area of ​​the C / C composite SiC coating on the modified glass powder using a fiber laser, and verifying the improvement of the borosilicate glass coating by the rare earth element Sm by comparing the process parameters and observ...

Embodiment 2

[0026] 1) Weigh SiO with a molar percentage of 70% respectively 2 Powder, 20% B 2 o 3 powder, 5% Al 2 o 3 Powder with 5% Sm 2 o 3 Powder, mixed evenly after ball milling for 3 hours;

[0027] 2) Put the mixed raw material powder into a corundum crucible and place it in a muffle furnace, raise the temperature to 1573K with the furnace in an air atmosphere, and continue heat treatment for 2 hours to fully melt and react the raw material powder at high temperature, and then take it out directly Cool to room temperature to obtain Sm modified borosilicate glass;

[0028] 3) In order to facilitate subsequent repair and use, the Sm-modified borosilicate glass block that has been melted and formed is ground into powder;

[0029] 4) Cladding the damaged area of ​​the C / C composite SiC coating on the modified glass powder using a fiber laser, and verifying the improvement of the borosilicate glass coating by the rare earth element Sm by comparing the process parameters and observ...

Embodiment 3

[0031] 1) Weigh respectively SiO with a molar percentage of 65%. 2 Powder, 20% B 2 o 3 powder, 5% Al 2 o 3 Powder with 10% Sm 2 o 3 Powder, mixed evenly after ball milling for 3 hours;

[0032] 2) Put the mixed raw material powder into a corundum crucible and place it in a muffle furnace, raise the temperature to 1573K with the furnace in an air atmosphere, and continue heat treatment for 2 hours to fully melt and react the raw material powder at high temperature, and then take it out directly Cool to room temperature to obtain Sm modified borosilicate glass;

[0033] 3) In order to facilitate subsequent repair and use, the Sm-modified borosilicate glass block that has been melted and formed is ground into powder;

[0034] 4) Cladding of the damaged area of ​​the C / C composite SiC coating was carried out on the modified glass powder by using a fiber laser, and the improvement of the borosilicate glass coating by the rare earth element Sm was verified by comparing the proc...

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Abstract

The invention relates to a modified glass material for repairing a carbon/carbon composite material SiC coating based on a laser cladding method as well as a preparation method and a use method of themodified glass material. Borosilicate glass is modified by rare earth element samarium, so that the absorptivity of the material to a laser band covered by an optical fiber laser is remarkably improved; on one hand, the cladding quality of the modified borosilicate glass can be improved, and the oxidation resistance of a repaired carbon/carbon composite material SiC coating sample is improved; and on the other hand, the energy loss of laser can be effectively reduced, and the development goals of greenness, environmental protection and cost saving are achieved.

Description

technical field [0001] The invention belongs to the technical field of laser surface engineering, and relates to a carbon / carbon composite material SiC coating repairing modified glass material based on a laser cladding method and a preparation and use method. Background technique [0002] As a material with good thermal stability, borosilicate glass will not easily undergo phase transition under high temperature and oxygen environment, effectively avoiding phase transition stress. At the same time, borosilicate glass has a similar thermal expansion coefficient to SiC coating, high viscosity, and low high-temperature volatility, so it can be used as a local repair material for damaged SiC coating, which can provide a long-lasting effect on the C / C composite matrix. Time high temperature oxidation protection. Literature 1 "Improved oxidation resistance of highemissivity coatings on fibrous ceramic for reusable space systems, Gaofeng Shao, Yucao Lu, Dorian A.H. Hanaor, Sheng ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03C6/04C03B5/16C04B41/89
CPCC03C12/00C03C1/00C03B5/16C04B41/89C04B41/52C04B41/009C04B35/83C04B41/5059C04B41/5022C04B41/4523C04B41/4572
Inventor 李贺军王翰辉滕柳史小红
Owner NORTHWESTERN POLYTECHNICAL UNIV
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