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Ti-B-C-N ceramic coating and preparation method thereof

A ceramic coating, ti-b-c-n technology, applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of poor coating performance, achieve good toughness, high-quality wear resistance, improve the overall The effect of hardness

Inactive Publication Date: 2014-09-10
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of Ti-B-C-N ceramic coating and preparation method thereof, solve the problem that when preparing Ti-B-C-N coating by reactive plasma spraying, the C-B content in the coating is less, coating performance is not good, improve the hardness of the coating

Method used

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  • Ti-B-C-N ceramic coating and preparation method thereof
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  • Ti-B-C-N ceramic coating and preparation method thereof

Examples

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example 1

[0036] Example 1 prepares Ti-B-C-N composite coating on Q235 steel plate

[0037] 1. Preparation of composite powder of Ti-B-C-N ceramic coating

[0038] (1) Combine 68g Ti powder, 17gB 4Put C powder, 6g of graphite powder and 10g of Co powder into a ball mill jar, the ball-to-material ratio is 3:1, add an appropriate amount of absolute ethanol, the ball mill speed is 200r / min, the ball mill time is 8h, and take out after the powder is evenly mixed;

[0039] (2) Dry the taken-out composite powder in a blast drying oven at 60°C;

[0040] (3) Add 3g of polyvinyl alcohol binder to the composite powder, mix well and put it on a tablet press for tableting at a pressure of 20MPa, and let stand for 5 minutes during tableting;

[0041] (4) Put the pressed block into a vacuum furnace and heat it to 600°C with a vacuum of 10 -4 MPa, keep warm for 2 hours and then cool down;

[0042] (5) Put the sintered block into a planetary ball mill for crushing, and sieve out a powder with a par...

Embodiment 2

[0054] 1. Preparation of composite powder of Ti-B-C-N ceramic coating

[0055] (1) Mix 101g Ti powder, 25gB 4 C powder, 9g of graphite powder and 15g of Co powder were put into a ball mill jar with a ball-to-material ratio of 4:1, an appropriate amount of absolute ethanol was added, the speed of the ball mill was 250r / min, and the ball milling time was 7h. After the powder was evenly mixed, it was taken out.

[0056] (2) Dry the taken out composite powder in a blast drying oven at 60°C;

[0057] (3) Add 5g of polyvinyl alcohol binder to the composite powder, mix well and put it on the tablet press for pressing

[0058] Tablets, the pressure is 20MPa, stand still for 5min when pressing;

[0059] (4) Put the pressed block into a vacuum furnace and heat it to 550°C with a vacuum of 10 -4 MPa, keep warm for 2 hours and then cool down;

[0060] (5) Put the sintered block into a planetary ball mill for crushing, and use a 300-mesh sieve to sieve the powder with a particle size o...

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Abstract

The invention discloses a Ti-B-C-N ceramic coating and a preparation method thereof. The Ti-B-C-N ceramic coating is prepared from the following components: 35% to 45% of Ti powder, 30% to 40% of B4C powder, 8% to 15% of graphite powder, 10% to 15% of Co powder and 1% to 8% of adhesion agent PVA (Poly Vinyl Acetate). The method comprises the following steps: firstly, preparing composite powder required for the spraying of the ceramic coating; then preparing the Ti-B-C-N ceramic coating by using a reaction plasma spraying method. According to the method, the prepared Ti-B-C-N ceramic coating comprises TiN, C0.3N0.7Ti and TiB2 which are taken as main phases, and also contains a small quantity of BN and other materials. According to the prepared Ti-B-C-N ceramic coating, the problem of poor coating performance due to the less content of B-C in the Ti-B-C-N coating prepared by using the conventional reaction plasma spraying method is solved. In addition, oxides are nearly not contained in the Ti-B-C-N ceramic coating; the hardness of the coating is improved due to BN existing in the coating.

Description

technical field [0001] The invention relates to a ceramic coating, in particular to a Ti-B-C-N ceramic coating and a preparation method thereof, belonging to the technical field of surface strengthening. Background technique [0002] Reactive plasma spraying technology is a new thermal spraying technology that organically combines self-propagating high-temperature synthesis technology and plasma spraying technology. The high temperature generated by plasma makes the sprayed material undergo self-propagating reaction rapidly, and the coating thickness can reach hundreds of microns. or even higher. Therefore, some high-melting ceramic coatings and metal-ceramic composite coatings can be prepared with maximum energy efficiency by reactive plasma spraying. In recent years, it is not uncommon to use reactive plasma spraying to prepare composite ceramic coatings with several of the four elements of Ti, N, C, and B as the basic constituent phases. / AlN composite coating, TiAl-Ti ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/12C23C4/06C23C4/134
Inventor 马静胡建文闫冬青李扬
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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