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Novel heat barrier coating material

A technology of thermal barrier coating and metal bonding layer, which is applied in the direction of coating, metal material coating process, superimposed layer plating, etc., can solve the problems of short coating cycle life and serious coating internal stress, and achieve The effects of small thermal gravitation, simple preparation method, and easy-to-obtain equipment

Inactive Publication Date: 2007-08-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But La 2 Zr 2 o 7 The thermal expansion coefficient is smaller than that of YSZ, and the thermal expansion coefficient of the base alloy is more different. The internal stress of the coating caused by the mismatch of high temperature thermal expansion will be more serious, and the coating cycle life will be short.

Method used

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  • Novel heat barrier coating material
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Experimental program
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Embodiment 1

[0015] Embodiment 1: prepare powder sample Nd 2 Ce 2 o 7 (Nd 2 o 3 +2CeO 2 ), the obtained powder sample was spray-dried to make a high-fluidity powder. A NiCrAlY metal bonding layer with a thickness of about 220 μm is deposited on the surface of the nickel-based superalloy by electron beam physical vapor deposition technology, and then a layer of Nd with a thickness of about 300 μm is deposited on the surface of the bonding layer by plasma spray technology. 2 Ce 2 o 7 The ceramic surface layer and the final thermal barrier coating system are shown in Figure 4.

Embodiment 2

[0016] Embodiment 2: Preparation of powder sample Nd 2 (Zr 0.9 Ce 0.1 )2O7, the obtained powder sample was spray-dried to make a high-fluidity powder. A layer of CoCrAlY metal bonding layer with a thickness of about 250 μm is deposited on the surface of the nickel-based superalloy by electron beam physical vapor deposition technology, and then a layer of Nd with a thickness of about 250 μm is deposited on the surface of the bonding layer by plasma spray technology. 2z (Zr 0.9 Ce0.1) 2 o 7 Ceramic finish.

Embodiment 3

[0017] Embodiment 3: Preparation of powder sample Nd 2 (Zr 0.5 Ce 0.5 ) 2 o 7 , the obtained powder sample was spray-dried to make a high-fluidity powder. A layer of FeCrAlY metal bonding layer with a thickness of about 250 μm is deposited on the surface of the cobalt-based superalloy by electron beam physical vapor deposition technology, and then a layer of Nd with a thickness of about 250 μm is deposited on the surface of the bonding layer by plasma spray technology. 2z (Zr 0.9 Ce 0.1 ) 2 o 7 Ceramic finish.

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Abstract

The invention relates to a series of ceramic materials used as high temperature thermal barrier coating materials and their use, wherein the chemical constitution of the ceramic material being A2ZrxCe(1-x)2O7, wherein 0<=x<=0.9, an is one or combination of two of Nd, Sm, Eu, Gd and Tb. The ceramic material has high coefficient of thermal expansion, thus can be designed into thermal barrier coating material, whose application temperature interval is between room temperature to 1400 deg. C.

Description

technical field [0001] The invention belongs to high-temperature thermal barrier coating technology and related coating materials. Background technique [0002] With the development of aviation, aerospace and civil technology, the temperature requirements of the hot end parts of the vortex engine are getting higher and higher, and the superalloy single crystal has reached the limit state of the material. In this case, from the material point of view, another feasible technology to reduce the operating temperature of engine blades - thermal barrier coating technology has been widely used. [0003] A comparative study by NASA showed that ZrO 2 The overall performance is superior. At 1000°C, ZrO 2 The coefficient of thermal expansion is 11×10 -6 K -1 , which is closest to the thermal expansion coefficient of the base alloy, while the thermal conductivity is only 2.1-2.2Wm -1 K -1 . But pure ZrO 2 In the usual temperature range, a martensitic phase transformation from t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/10C23C14/08C23C28/04F01D5/28C23C4/11C23C4/134
Inventor 代辉李佳艳曹学强孟健
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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