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Coating structure with sandwich nano ceramic layer and preparation method of coating structure

A nano-ceramic, sandwich structure technology, applied in the coating, metal material coating process, layered products and other directions, can solve the high temperature nano-ceramic coating without substantial technological breakthrough, limited application scope, poor controllability, etc. problems, to achieve excellent high temperature resistance, reduced preparation steps, and the effect of dense coating

Active Publication Date: 2015-03-04
NANJING ZHONGKE SHENGUANG TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Because the laser has fast heating and cooling speed, it is an ideal method for preparing nano-coatings, but its controllability is poor, so the obtained nano-ceramic structures are diverse, and the surface stress is large, which is easy to peel off
The yttria partially stabilized zirconia thermal barrier ceramic coating (YPSZ) processed by electron beam physical vapor deposition (EB-PVD) is low in preparation efficiency and high in cost, although the overall coating is nanostructured.
Due to the above reasons, there is no substantial technological breakthrough for high-temperature nano-ceramic coatings, which limits its application range.

Method used

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  • Coating structure with sandwich nano ceramic layer and preparation method of coating structure
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  • Coating structure with sandwich nano ceramic layer and preparation method of coating structure

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Embodiment Construction

[0028] The invention provides a coating structure with a sandwich nano-ceramic layer and a preparation method. The invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 As shown, 1 is a base, 2 is a transition layer, 3 is a ceramic layer, and the ceramic layer 3 is a sandwich structure, the upper and lower layers of the sandwich are ordinary ceramic layers 31, and the middle layer is a nano-ceramic layer 32.

[0029] According to an embodiment of the present invention, Al is prepared on a TiAl alloy substrate 1 2 o 3 Nano ceramic coating. The specific operation is as follows:

[0030] (1) Clean the substrate 1 with acetone and alcohol, and then sandblast it for later use;

[0031] (2) Pure Ti powder, Al powder and Al with a particle size of 20nm 2 o 3 Nano ceramic powder (such as figure 2 Shown) is configured according to the mass ratio of 4.3:4.7:1, and the transition layer powder is obtained by mixing in a ball mill...

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Abstract

The invention relates to the field of material surface engineering, and particularly relates to a coating structure with a sandwich nano ceramic layer and a preparation method of the coating structure. The coating structure with the sandwich nano ceramic layer disclosed by the invention comprises a transition layer and a ceramic layer, wherein one surface of the transition layer and a base body are in metallurgical bonding; the other surface of the transition layer and the ceramic layer are in metallurgical bonding; the ceramic layer is a sandwich structure ceramic layer; common ceramic layers are arranged on the upper and lower layers; and the nano ceramic layer is arranged in the middle layer. The coating with the sandwich nano ceramic layer has excellent high temperature resistance and relatively good tenacity and malleability, and is wide in use and long in service life. According to the preparation method of the coating structure disclosed by the invention, different coating structures with the sandwich nano ceramic layers can be prepared on various high-temperature alloy surfaces; the method is simple and efficient, and is contributed to reserving the nano characteristics of the coating.

Description

technical field [0001] The invention relates to the field of material surface engineering, in particular to a coating structure with a sandwich nano-ceramic layer and a preparation method. Background technique [0002] In the high-temperature material industry, due to the increasingly high heat resistance requirements of materials in the working environment, pure metal materials can no longer meet the requirements. At the same time, ceramic materials have excellent wear resistance, corrosion resistance, heat resistance and high temperature oxidation resistance, but their applications are limited due to their high brittleness, poor fatigue resistance, sensitivity to stress and cracks, and difficulty in processing. . Therefore, people gradually use ceramic coating as a surface protection layer to form a metal / ceramic composite material on the metal surface, organically combining the characteristics of the base metal and the surface ceramic coating, and giving full play to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B32B9/00
CPCB32B9/005C23C24/10
Inventor 高雪松肖猛张涛刘建涛
Owner NANJING ZHONGKE SHENGUANG TECH
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