Method for indirect dispersion strengthening of platinum channel

A platinum channel and dispersion strengthening technology, which is applied in metal material coating process, fusion spraying, coating, etc., can solve the problem of platinum volatilization, high temperature strength and high temperature creep performance degradation, and can not meet the requirements of TFT-LCD liquid crystal glass substrate. To meet the environmental requirements and other issues, to avoid zirconium, improve high temperature strength and creep resistance

Inactive Publication Date: 2019-06-04
IRICO DISPLAY DEVICES
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Problems solved by technology

However, the crystal grains of pure platinum are easy to grow under high temperature conditions, and the high temperature strength and high temperature creep properties are reduced, which cannot meet the working condition requirements in the production process of TFT-LCD

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  • Method for indirect dispersion strengthening of platinum channel

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0010] like figure 1 , the zirconia lattice type used is yttrium-stabilized zirconia, the yttrium-stabilized zirconia powder is put into the plasma spraying equipment through the powder inlet 1, the cathode 3 and the anode 7 are respectively connected to the power supply negative pole 5 and the power supply positive pole 4, and the DC power supply positive pole 4 1. A potential difference is generated between the anode 7 and the cathode 3 under the action of the negative electrode 5 of the DC power supply, and the yttrium-stabilized zirconia powder is fused to form the plasma flame 2 through the high-frequency spark ignition arc, and the plasma flame 2 is transported through the cooling medium plasma gas 6, It is sprayed on the outer wall of the platinum channel body 8 to form a dense and uniform yttrium-stabilized zirconia coating 9 with a thickness of 0.10-...

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Abstract

The invention discloses a method for indirect dispersion strengthening of a platinum channel. By plasma spraying, a second-phase zirconia coating insoluble in a metal matrix is sprayed on the outer wall of the platinum channel, and the platinum is subjected to indirect dispersion strengthening by the permeation and diffusion effect between the particles at a high temperature. By means of the method, on one hand, the expansion resistance under high-temperature and high-temperature creep resistance of the platinum channel are improved, and on the other hand, the platinum is prevented from beingoxidized and volatilized at high temperatures and generation of zirconium stones due to the direct contact of molten glass with zirconia is avoided.

Description

technical field [0001] The invention belongs to the field of liquid crystal substrate glass production and processing, and in particular relates to a method for indirect dispersion strengthening of platinum channels. Background technique [0002] The platinum channel is a crucial part in the production of TFT-LCD liquid crystal glass substrates. Its main function is to clarify, homogenize, and adjust the viscosity of the molten glass, so as to provide qualified and high-quality molten glass for the next process. However, pure platinum tends to grow crystal grains under high temperature conditions, and the high temperature strength and high temperature creep properties decrease, which cannot meet the working condition requirements in the production process of TFT-LCD liquid crystal glass substrates. The introduction of rhodium element can improve the high temperature performance of platinum to a certain extent through solid solution strengthening, but platinum is easily oxidi...

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Application Information

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IPC IPC(8): C23C4/134C23C4/11
Inventor 赵龙江
Owner IRICO DISPLAY DEVICES
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