Yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for plasma physical vapor deposition and preparation method thereof and application

A technology of physical vapor deposition and stabilization of zirconia, which is applied in metal material coating process, coating, melt spraying and other directions, can solve the problem of high powder tap density and the inability to successfully prepare quasi-columnar crystal structure thermal barrier coatings and other problems, to achieve the effect of avoiding thermal cycle performance, avoiding the reduction of gasification capacity, and excellent mechanical properties

Active Publication Date: 2018-09-18
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional plasma spraying powder making process mentioned above is not applicable, especially the contradiction between the small powder particle size and the high tap density cannot be solved, resulting in that the powder cannot be fully gasified because the particle size is not small enough or cannot be sent into the jet due to insufficient tap density The center is fully heated, and the quasi-columnar crystal structure thermal barrier coating cannot be successfully prepared

Method used

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  • Yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for plasma physical vapor deposition and preparation method thereof and application
  • Yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for plasma physical vapor deposition and preparation method thereof and application
  • Yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for plasma physical vapor deposition and preparation method thereof and application

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Experimental program
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Embodiment 1

[0042] This embodiment provides a method for preparing yttria-stabilized zirconia-doped lanthanum cerate material powder for plasma physical vapor deposition, which includes the following steps:

[0043] Step 1. Four raw material powders of lanthanum oxide, cerium oxide, yttrium oxide and zirconium oxide are mixed according to the molar ratio of La:Ce:Y:Zr=0.8:1:0.08:1 and ball milled to obtain a ball milled product.

[0044] The ball milling process is as follows: first mix alcohol, zirconia balls and raw material powder according to the mass ratio of 1:1:1, the particle size of the balls is 3 μm, the speed of the ball mill is 500 r / min, wet ball milling for 20 hours, and then dry to obtain a solid product ; Then mix the dried solid product with zirconia balls in a mass ratio of 2:1, the zirconia balls have a particle size of 3 μm, and the ball mill speed is 500r / min, and carry out dry ball milling for 10 hours; after ball milling, the particle size distribution of the ball mi...

Embodiment 2

[0060] The preparation method of yttria-stabilized zirconia-doped lanthanum cerate material powder for plasma physical vapor deposition in this embodiment includes the following steps:

[0061] Step 1. Mix lanthanum oxide, cerium oxide, yttrium oxide and zirconia powder according to the molar ratio of La: Ce: Y: Zr = 1.3: 1: 0.08: 1 for ball milling: first mix alcohol, zirconia balls and raw materials Mix according to the mass ratio of 1:1:1, the particle size of the ball is 3μm, the speed of the ball mill is 500r / min, wet ball mill for 40h and dry, and then the product and the zirconia ball are mixed according to the mass ratio of 2:1, and the particle size of the ball is 3μm , the speed of the ball mill is 500r / min, and dry ball milling is carried out for 20h; after the ball milling, the particle size distribution is 1-35μm;

[0062] Step 2. Filter the ball milling product described in step 1 to get the retentate, wash the retentate with alcohol until it is neutral and dry i...

Embodiment 3

[0077] In this embodiment, the yttria-stabilized zirconia-doped lanthanum cerate material and its coating preparation method for plasma physical vapor deposition include the following steps:

[0078] Step 1. Mix lanthanum oxide, cerium oxide, yttrium oxide and zirconia powder according to the molar ratio of La: Ce: Y: Zr = 1.1: 1: 0.08: 1 for ball milling. First, alcohol, zirconia balls and raw materials Mix according to the mass ratio of 1:1:1, the particle size of the ball is 3μm, the speed of the ball mill is 500r / min, wet the ball mill for 30h and dry it, then mix the product with the zirconia ball at a mass ratio of 2:1, and the particle size of the ball is 3μm , the speed of the ball mill is 500r / min, and dry ball milling is carried out for 15 hours; after the ball milling, the particle size distribution is 1-40 μm;

[0079] Step 2. Filter the ball milling product described in step 1 to get the retentate, wash the retentate with alcohol until neutral and dry it at 100°C ...

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Abstract

The invention discloses yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for plasma physical vapor deposition and a preparation method thereof and application, and relates to the technical field of thermal barrier coating. The preparation method comprises the followings steps that lanthanum oxide, cerium oxide, yttrium oxide and zirconia are mixed in a molar ratio of (0.8-1.3):1:0.08:1 for ball-milling treatment, and ball-milling products are obtained; the products are filtered and dried, the products is performed ball milling with deionized water, binders and dispersants after drying to be mixed uniformly, and sizing agents are obtained; the sizing agents are performed spraying and drying treatment to obtain aggregates; and the aggregates are performed screening treatment after sintering to obtain the yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for the plasma physical vapor deposition. When a coating is prepared, the powder is heatedin a powder feeder to start plasma physical gas phase deposition equipment, and the vacuum is pumped to the pressure less than 0.08mbar and the vacuum chamber is filled with argon to 130mbar; and thenspraying is performed to obtain the coating. The yttria-stabilized zirconia doped lanthanum-cerium oxide material powder for the plasma physical vapor deposition and the preparation method thereof and the application have simple steps and save cost, improve material performance and can be used in mass industrial production.

Description

technical field [0001] The invention relates to the technical field of thermal barrier coatings, in particular to a yttria-stabilized zirconia-doped lanthanum cerate material for plasma physical vapor deposition and a coating preparation method thereof. Background technique [0002] Thermal Barrier Coatings (TBCs for short) use the superior high temperature resistance, corrosion resistance and high heat insulation performance of ceramic materials to combine ceramics and metal substrates in the form of coatings to increase the working temperature of metal hot end parts. A surface protection technology that enhances the high-temperature oxidation resistance of hot-end parts, prolongs the service life of hot-end parts, and improves engine efficiency. [0003] Lanthanum cerate (La 2 Ce 2 o 7 , referred to as LC) materials have good high-temperature phase stability (no phase change up to 1400°C), very low thermal conductivity (about 0.6W / m·K, 1000°C), low specific heat (0.43J / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/11C04B35/622C04B35/50
CPCC04B35/50C04B35/62222C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3244C23C4/11C23C4/134
Inventor 郭洪波赵聪魏亮亮宫声凯徐惠彬
Owner BEIHANG UNIV
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