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Ti3SiC2-based composite material coating and plasma spray in-situ reaction preparation method thereof

A composite material and plasma technology, applied in the field of ion spraying in-situ preparation, can solve the problem of less coating research, and achieve the effect of flexible control of coating thickness, improvement of poor wear resistance and high efficiency

Inactive Publication Date: 2015-03-25
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In terms of research on Ti3SiC2 and its composite materials, most of the research at home and abroad is focused on bulk materials, and there are few researches on coatings.

Method used

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  • Ti3SiC2-based composite material coating and plasma spray in-situ reaction preparation method thereof
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  • Ti3SiC2-based composite material coating and plasma spray in-situ reaction preparation method thereof

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preparation example Construction

[0032] like figure 1 Shown, Ti of the present invention 3 SiC 2 The preparation method of matrix composite material coating comprises the steps:

[0033] S1. By weight percentage, weigh 65-80wt.% Ti powder, 15-25wt.% SiC powder, 5-10wt.% C powder;

[0034] S2. ultrasonically disperse the weighed Ti powder, SiC powder, and C powder in absolute ethanol respectively;

[0035] S3. The Ti powder, SiC powder, and C powder after ultrasonic dispersion are ball-milled to form a mixed slurry;

[0036] S4. Micron aggregated particles prepared by spray drying the mixed slurry;

[0037] S5. Dry the prepared micron aggregated particles, and use the sieved micron aggregated particles as plasma spraying feed;

[0038] S6. carrying out surface pretreatment and fixing the substrate to be sprayed;

[0039]S7. Spray the feed material sieved in step S5 on the substrate in step S6 by plasma spraying technology.

[0040] In step S1, high-purity 65-80wt.% Ti powder, 15-25wt.% SiC powder, and 5...

Embodiment 1

[0051] Weigh an appropriate amount of raw materials according to 75wt.% of Ti powder, 20wt.% of SiC powder, and 5wt.% of C powder; ultrasonically disperse them in absolute ethanol for 30 minutes; ball milling: put the Ti, SiC, and C powders after ultrasonic dispersion together Put it into a planetary ball mill tank for ball milling to make a uniformly mixed slurry. The ball-to-material ratio is 5:1, the rotating speed is 300r / min, and the ball milling time is 12h; spray granulation: the mixed slurry is sprayed into the drying chamber for atomization, and the droplets are dried rapidly in the hot air to form micron agglomerated particles. The dry atomization pressure is 0.5MPa, the indoor temperature is 200°C, and the outlet temperature is 100°C; after drying and screening, 40-60μm micron agglomerated particles are obtained as plasma spraying feed; the stainless steel substrate is polished with fine sandpaper and then the surface is sandblasted. , and fixed on the plasma sprayi...

Embodiment 2

[0053] Weigh an appropriate amount of raw materials according to 75wt.% of Ti powder, 20wt.% of SiC powder, and 5wt.% of C powder; ultrasonically disperse them in absolute ethanol for 30 minutes; ball milling: put the Ti, SiC, and C powders after ultrasonic dispersion together Put it into a planetary ball mill tank for ball milling to make a uniformly mixed slurry. The ball-to-material ratio is 5:1, the rotating speed is 300r / min, and the ball milling time is 12h; spray granulation: the mixed slurry is sprayed into the drying chamber for atomization, and the droplets are dried rapidly in the hot air to form micron agglomerated particles. The dry atomization pressure is 0.5MPa, the indoor temperature is 200°C, and the outlet temperature is 100°C; after drying and screening, 40-60μm micron agglomerated particles are obtained as plasma spraying feed; the stainless steel substrate is polished with fine sandpaper and then the surface is sandblasted. , and fixed on the plasma sprayi...

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Abstract

The invention discloses a Ti3SiC2-based composite material coating and a preparation method thereof, wherein the preparation method of the Ti3SiC2-based composite material coating comprises the following steps: S1, weighing raw materials; S2, carrying out ultrasonic dispersion; S3, ball-milling Ti powder, SiC powder and C powder after ultrasonic dispersion, so as to form mixed slurry; S4, spray drying the mixed slurry to prepare micronmeter agglomerated particles; S5, drying the prepared micronmeter agglomerated particles and sieving the dried micronmeter agglomerated particles; S6, carrying out surface pre-treatment on a to-be-sprayed substrate and fixing the substrate; and S7, spraying the micronmeter agglomerated particles dried in the step S4 onto the substrate treated in the S6 by virtue of a plasma spray method. The preparation method is simple to operate, convenient and controllable and high in efficiency and the thickness of the coating is flexibly controlled, and the prepared Ti3SiC2-based composite material coating has the performances of wear resistance, corrosion resistance, high-temperature oxidization resistance and the like and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of material synthesis, in particular to a Ti 3 SiC 2 Matrix composite material coating, and its plasma spraying in-situ preparation method. Background technique [0002] In many advanced industries such as aerospace, iron and steel and non-ferrous metallurgy, petrochemical industry and major national defense technical equipment, its key metal parts, such as aero-engine bearings, bushings, turbine blades, and special components used in petrochemical and metallurgical industries Thermocouple sleeves, high-temperature wear-resistant program-controlled valves, etc., are all in extremely complex and harsh working environments: high-temperature oxidation, strong friction and wear, erosion or impact of high-temperature gas / oil agent, and extreme damage caused by sudden cooling and sudden heating. Great thermal stress. [0003] At the same time, the above-mentioned key components also have to bear a relatively la...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/12C23C4/134
CPCC23C4/06
Inventor 陈瑶刘卫卫赵栋齐菲王永光邢占文
Owner SUZHOU UNIV
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