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A kind of method for preparing max phase ceramic coating by thermal spraying

A ceramic coating and nozzle technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problems of low purity and decomposition of the coating, achieve high purity, low energy consumption, avoid high temperature and easy heat The effect of decomposition

Active Publication Date: 2017-12-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the problem that the MAX phase is easily decomposed when the thermal spraying method is used to prepare the MAX phase ceramic coating, resulting in low coating purity, the present invention aims to improve the method and obtain a high-purity MAX phase ceramic coating

Method used

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  • A kind of method for preparing max phase ceramic coating by thermal spraying
  • A kind of method for preparing max phase ceramic coating by thermal spraying
  • A kind of method for preparing max phase ceramic coating by thermal spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, the plasma spraying technology is used to prepare Ti on the surface of 304 steel substrate. 3 AlC 2 Ceramic coating, the specific preparation method is as follows:

[0042] (1) Weigh 30gTi 3 AlC 2 Dissolve the ceramic powder in 500ml deionized water to obtain a powder solution for use;

[0043] (2) Weigh 1g of polyethyleneimine and dissolve it in 100ml of deionized water, stir and dissolve evenly to obtain polyethyleneimine solution for use;

[0044] (3) Measure 30ml of the polyethyleneimine solution prepared in step (2), dissolve it in the powder solution prepared in step (1), and stir evenly with magnetic force to obtain Ti 3 AlC 2 Suspension 1;

[0045] (4) if figure 1 As shown, using plasma spraying technology, the Ti obtained in step (3) 3 AlC 2 The suspension 1 is sprayed and deposited on the surface of the substrate 5 through the nozzle 4 to form a coating under the power provided by the peristaltic pump 2. The specific spraying param...

Embodiment 2

[0059] In the present embodiment, adopt plasma spray technology, the Ti that steps (1) to (3) in embodiment 1 are prepared 3 AlC 2 The suspension was vertically sprayed into liquid nitrogen through the nozzle under the action of the same peristaltic pump as in Example 1, then dried, and the sprayed dry powder was collected. Among the specific spraying parameters, the ion spraying parameter is 20kw, and the rest of the parameters are exactly the same as those listed in Table 1.

[0060] The dry powder after spraying was analyzed by XRD, Figure 4 It is the XRD diffraction pattern of the powder, obtained through the XRD diffraction peak: the main peak intensity is Ti 3 AlC 2 , and a small amount of TiC and Al 2 o 3 . By semi-quantitative calculation: Ti in the sprayed powder 3 AlC 2 The phase content is about 65%, indicating that the Ti 3 AlC 2 The phase accounts for the vast majority, and this method can prepare relatively pure Ti 3 AlC 2 coating.

[0061] Compare ...

Embodiment 3

[0063] In this embodiment, the plasma spraying technology is used to prepare Ti on the surface of 304 steel substrate. 3 AlC 2 +20% Al ceramic coating, the specific preparation method is as follows:

[0064] (1) Weigh 40gTi 3 AlC 2 Powder ceramics, then weigh 8g of Al powder, mix the two, add ethanol to it, then put it into a planetary ball mill, ball mill and mix evenly to get Ti 3 AlC 2 Mixed powder with Al powder, where Al powder accounted for Ti 3 AlC 2 20% of powder mass;

[0065] (2) Preparation of Ti 3 AlC 2 +20% Al powder suspension:

[0066] Concrete steps are the same as steps (1)~(3) in embodiment 1, only difference is the Ti in embodiment 1 step (1) 3 AlC 2 The Ti obtained in the above steps (1) is used for the powder 3 AlC 2 Replaced with the mixed powder of Al powder, what is produced in step (3) is Ti3 AlC 2 +20% Al powder suspension;

[0067] (3) using plasma spraying technology, the Ti obtained in step (2) 3 AlC 2 The +20% Al powder suspension...

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Abstract

The invention provides a method for preparing a MAX phase ceramic coating by thermal spraying. In the method, the MAX phase ceramic material is dispersed in a solvent to form a MAX phase suspension, and then sprayed onto the surface of a substrate through a nozzle to form a coating. In the spraying process, because the solvent plays the role of reducing heat and cooling the MAX phase powder, it is beneficial to inhibit the decomposition of the MAX phase powder; at the same time, the vapor atmosphere formed by the evaporation of the solvent is conducive to the formation of an oxide film by the metal elements in the MAX phase powder. Further inhibits the decomposition of MAX phase powder. Therefore, compared with spraying MAX phase powder, adopting this spraying method is beneficial to improve the purity of MAX phase in the coating.

Description

technical field [0001] The invention relates to the technical field of MAX phase ceramic materials, in particular to a method for preparing a MAX ceramic coating by thermal spraying, which can be applied to technical fields such as nuclear fuel cladding. Background technique [0002] The energy crisis is a major problem facing the development of the world, and nuclear energy, as a clean and efficient energy source, has attracted more and more attention from all countries and has become one of the main ways to solve the energy crisis. Since the United States realized the safe use of nuclear energy for the first time in 1951, many countries have carried out research on nuclear energy and the construction of reactors. [0003] However, the development of nuclear energy also brings many problems, among which the protection of nuclear fuel cladding is one of the important problems. With the development of nuclear energy, cladding materials have also undergone tremendous developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/10C23C4/129C23C4/134
Inventor 黄庆于海澄龚永锋李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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