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Preparation of tio by a low temperature metastable fluidization process x c y no z Systems and methods for coatings and composite coatings thereof

A composite coating and steady flow technology, which is applied in the direction of coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of high raw material cost, deterioration of matrix performance, grain growth, etc., and achieve widening range, The effect of temperature reduction and cost reduction

Active Publication Date: 2020-07-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still two main problems in this type of process: first, the raw material cost of the low-temperature deposition system is very high
Because exceeding this temperature usually leads to grain growth or phase transformation, which deteriorates the properties of the matrix

Method used

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  • Preparation of tio by a low temperature metastable fluidization process <sub>x</sub> c <sub>y</sub> no <sub>z</sub> Systems and methods for coatings and composite coatings thereof
  • Preparation of tio by a low temperature metastable fluidization process <sub>x</sub> c <sub>y</sub> no <sub>z</sub> Systems and methods for coatings and composite coatings thereof
  • Preparation of tio by a low temperature metastable fluidization process <sub>x</sub> c <sub>y</sub> no <sub>z</sub> Systems and methods for coatings and composite coatings thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] combine figure 1 , the low temperature metastable fluidization process in this example prepares TiO x C y N z The coating and its composite coating system include reducing agent feeding device 1, inert powder feeding device 2, TiCl 4 Gas supply device 3, first metastable flow reactor 4, purification device 5, second metastable flow reactor 6, matrix 7, powder recovery bin 8, condensation recovery device 9;

[0041] The outlet at the bottom of the reducing agent feeding device 1 is connected to the inlet of the first metastable flow reactor 4 through a pipeline and a material valve; the outlet of the inert powder feeding device 2 is connected through a pipeline And the feed valve is connected with the feed inlet of the first metastable flow reactor 4; the TiCl 4 The inlet of the gas supply device 3 is connected with hydrogen and inert gas pipelines through pipelines and gas valves; the TiCl 4 The gas outlet of the gas supply device 3 is connected with the gas inlet ...

Embodiment 2

[0045] This example uses the low-temperature metastable fluidization process in the above-mentioned example 1 to prepare TiO x C y N z The coating and its composite coating specifically include the following steps:

[0046] The reducing agent in the reducing agent feeding device 1 and the inert powder in the inert powder feeding device 2 enter the first metastable flow reactor 4; hydrogen and inert gas enter the TiCl 4 Carry TiCl after gas supply device 3 4 Entering the first metastable flow reactor 4, the reducing agent and the inert powder react in a medium inert atmosphere; the product of the first metastable flow reactor 4 enters the purification device 5 through a material valve, and is purified Then enter the second metastable flow reactor 6 through the pipeline and material valve; the inert gas is mixed with one or more of nitrogen source gas, carbon source gas and oxygen and enters the second metastable flow reactor 6; The product of the first metastable flow react...

Embodiment 3

[0048] This implementation example is based on the above implementation example 2, the reducing agent in the reducing agent feeding device 1 is coarse titanium sponge particles; the TiCl 4 The carrier gas in the gas supply device 3 is H 2 Mixed gas with Ar, H 2 Ratio to Ar (H 2 / Ar) is 0.5, the fluidization gas velocity of the first metastable flow reactor 4 is 0.9 times the minimum fluidization gas velocity, the temperature of the first metastable flow reactor 4 is 400°C, and the time is 180min The temperature room temperature in the purification device 5, the pressure is standard atmospheric pressure, and the purification time is 10min; the temperature of the second metastable flow reactor 6 is 300 ° C, and the gas in the second metastable flow reactor 6 It is argon, and the gas velocity of argon is 0.3 times of the minimum fluidization gas velocity. The substrate 7 is ordinary glass, and the Ti coating is obtained after 8 hours of deposition. figure 2 It is the SEM pict...

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Abstract

The invention discloses a system and method for preparing a TiOxCyNz coating and a composite coating thereof by a low-temperature metastable fluidization process. The method comprises the steps of transferring TiCl4 with low cost in a metastable fluidization pre-reactor to a metastable fluidization coating reactor after pretreatment; and then depositing the TiOxCyNz coating and the composite coating thereof on a substrate. The TiOxCyNz coating and the composite coating thereof have the advantages of (1) solving the problem of low efficiency caused by a diffusion-controlled solid-gas reaction in a traditional reduction process of the TiCl4, and significantly reducing the reduction cost of the traditional process; (2) significantly reducing the temperature of the TiOxCyNz coating and the composite coating thereof by chemical vapor deposition, and widening the range of the substrate types; and (3) achieving the simple and economical process operation so as to produce various coatings andcomposite coatings, and obtaining good economic and social benefits.

Description

technical field [0001] The invention belongs to the fields of chemical industry and materials, in particular to a low-temperature metastable fluidization process for preparing TiO x C y N z Systems and methods for coatings and composite coatings thereof. Background technique [0002] Metal titanium Ti, titanium oxide TiO x And ultra-high melting point TiN, TiC, Ti(C,N) and other ceramic coatings and their composite coatings have corrosion resistance, wear resistance, good chemical stability, high hardness, etc., and are used in high-end automobile manufacturing, petrochemical, acid and alkali It is widely used as an advanced protective material in the fields of industry, navigation, aviation and aerospace. For these high-performance coating materials, four basic conditions usually need to be met: first, good adhesion to ensure that the coating does not fall off during use; second, low preparation temperature to minimize the temperature field during the preparation proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/30C23C16/44
CPCC23C16/30C23C16/44
Inventor 向茂乔朱庆山宋淼
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI