Method for preparing yttrium silicate coat by cathode rotation hydrothermal electrophoretic deposition

A cathode rotation and electrophoresis deposition technology, which is applied in the direction of coating, electrolytic coating, electrophoretic plating, etc., to achieve the effect of uniform coating, avoiding repeated operations, and simple process control

Inactive Publication Date: 2009-08-26
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the above methods all require high temperature to prepare a more ideal coating

Method used

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  • Method for preparing yttrium silicate coat by cathode rotation hydrothermal electrophoretic deposition

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Embodiment 1

[0014] Embodiment 1: at first, select 5 microns of analytically pure yttrium silicate (Y 2 Si 2 o 7 ) powder, analytically pure isopropanol and iodine as raw materials, according to Y 2 Si 2 o 7 : isopropanol=2.5g: 150ml ratio is prepared into a suspension, after mechanical stirring at 1500r / min for 8h, after introducing iodine in the suspension at a ratio of 0.5g / L and stirring for 12h, place it in an ultrasonic wave at 500W After oscillating under power for 60 minutes, it is ready for use; secondly, the above suspension is added to the hydrothermoelectrophoresis deposition reaction kettle, the graphite electrode is used as the anode, and the carbon / carbon composite material pre-deposited with a SiC coating with a thickness of 100 microns that can be rotated is used as the cathode; Then, after the carbon / carbon composite material pre-deposited with a 50-100 micron thick SiC coating is fixed on the cathode, the hydrothermoelectrophoretic deposition reactor is sealed, and t...

Embodiment 2

[0015] Embodiment 2: at first, select 0.05 micron analysis pure yttrium silicate (Y 2 Si 2 o 7 ) powder, analytically pure isopropanol and iodine as raw materials, according to Y 2 Si 2 o 7: The ratio of isopropanol=5g: 150ml is prepared into a suspension, after mechanical stirring at 2000r / min for 12h, after introducing iodine in the suspension at a ratio of 1.5g / L and stirring for 10h, place it in an ultrasonic wave at a power of 100W After shaking for 10 minutes, it is ready for use; secondly, the above suspension is added to the hydrothermoelectrophoretic deposition reaction kettle, the graphite electrode is used as the anode, and the carbon / carbon composite material with a 50 micron thickness of SiC coating that can be rotated is pre-deposited as the cathode; then After the carbon / carbon composite material pre-deposited with a 50-100 micron thick SiC coating is fixed on the cathode, seal the hydrothermoelectrophoretic deposition reactor, and at the same time heat the ...

Embodiment 3

[0016] Embodiment 3: at first, select 0.5 micron analytically pure yttrium silicate (Y 2 Si 2 o 7 ) powder, analytically pure isopropanol and iodine as raw materials, according to Y 2 Si 2 o 7 : isopropanol=4g: 150ml ratio is prepared into a suspension, after mechanical stirring at 1000r / min for 10h, introduce iodine into the suspension at a ratio of 1g / L and stir for 8h, then place it in an ultrasonic wave at a power of 300W After shaking for 30 minutes, it is ready for use; secondly, the above-mentioned suspension is added to a hydrothermoelectrophoretic deposition reactor, with a graphite electrode as an anode, and a carbon / carbon composite material that can be rotated and pre-deposited with a SiC coating with a thickness of 80 microns as a cathode; then, After the carbon / carbon composite material pre-deposited with a SiC coating with a thickness of 50-100 microns is fixed on the cathode, the hydrothermoelectrophoretic deposition reactor is sealed, and the hydrothermoel...

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Abstract

The invention relates to a method for preparing an yttrium silicate coat by cathode rotation hydrothermal electrophoretic deposition. A cathode rotation hydrothermal electrophoretic deposition method is used for preparing an yttrium silicate antioxidant coat on the surface of carbon/carbon-carborundum composite. Yttrium silicate powder is used as raw material to be respectively made into the yttrium silicate coats with compact structure, microcrack and different thickness in certain powder material proportion, under certain temperature and voltage and at different cathode rotation speeds. The method has the advantages of simple technical control and uniform coat, avoids repeated operation to certain extent and can be used for product with complex surface, and the method can obtain the yttrium silicate coat with controllable structure and good performance under low temperature.

Description

technical field [0001] The invention relates to a method for preparing an yttrium silicate coating, in particular to a method for preparing the yttrium silicate coating by cathode rotary hydrothermoelectrophoretic deposition. Background technique [0002] In recent years, carbon / carbon composites have gradually become a research hotspot. Due to the characteristics of low thermal expansion coefficient, low density, ablation resistance, corrosion resistance, stable friction coefficient, good thermal and electrical conductivity, high strength and high modulus of carbon / carbon composite materials, especially the mechanical properties do not decrease but increase with the increase of temperature. characteristics, so it is used in aviation, aerospace and civil industry. However, many of its above-mentioned properties can only be maintained in an inert atmosphere or below 450 °C, and the oxidation weight loss will significantly reduce the mechanical properties of carbon / carbon com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/02C04B41/87
Inventor 黄剑锋王雅琴曹丽云杨强夏昌奎殷立雄卢靖吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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