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Method for preparing TixNy coating in situ by utilizing molten salt disproportionation reaction and product with TixNy coating

A technology of disproportionation reaction and in-situ preparation, which is applied in the direction of coating, metal material coating process, liquid chemical plating, etc., can solve the problems of metal nitride coating reporting and other problems, achieve long service life, simple preparation process steps, easy-to-achieve effects

Pending Publication Date: 2020-11-17
SONGSHAN LAKE MATERIALS LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the many advantages of molten salt disproportionation reaction, researchers have successfully prepared Ti, Cr-Si and other metal and alloy coatings, but there are no related reports on the preparation of metal nitride coatings.

Method used

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  • Method for preparing TixNy coating in situ by utilizing molten salt disproportionation reaction and product with TixNy coating
  • Method for preparing TixNy coating in situ by utilizing molten salt disproportionation reaction and product with TixNy coating
  • Method for preparing TixNy coating in situ by utilizing molten salt disproportionation reaction and product with TixNy coating

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1: This example provides an in-situ preparation of Ti by molten salt disproportionation reaction x N y coating method, see figure 1 , which includes the following steps:

[0033] (1) Pretreatment of substrate

[0034] Metal nickel, ferritic stainless steel, austenitic stainless steel and titanium alloy are selected as the substrate to be plated. However, the present invention includes but is not limited to the above-mentioned metals or alloy materials, as for other metals or alloy materials, as long as they are not dissolved in the molten salt system.

[0035] The substrate was pretreated, and all samples were mechanically polished with 240#, 600# and 1000# SiC sandpaper in sequence, and then ultrasonically cleaned with water, acetone and absolute ethanol, respectively, and dried for later use.

[0036] (2) to form a mixture

[0037] Mix the elemental titanium and the titanium compound with the alkali metal salt uniformly in a crucible to obtain a mixture. ...

Embodiment 2

[0052] Embodiment 2: In this embodiment, weigh 50 units of weight (for example, kilograms) of NaCl-KCl eutectic salt, and mix with 2 units of weight of Ti powder (300 mesh), 4 units of weight of K 2 TiF 6 Mix well in a graphite crucible. The above-mentioned graphite crucible was placed at the bottom of the closed reactor, and the 316L stainless steel substrate was suspended at the position where the compound was separated from the reactor. A mixture of nitrogen and argon was fed into the reactor, wherein the proportion of nitrogen was 20%. After heating up to 900°C at a rate of 8°C / min and stabilizing for 20 minutes, immerse the 316L stainless steel substrate in the molten compound and keep it at this temperature for 3 hours, then slowly lift the 316L stainless steel substrate into the reactor to get out of the melt The position of the compound in the state and cooled to room temperature with the furnace. The 316L stainless steel substrate was taken out and ultrasonically c...

Embodiment 3

[0054] Embodiment 3: In this embodiment, weigh 20 units of weight (for example, kilograms) of NaCl-KCl eutectic salt, and mix with 0.5 units of weight of Ti powder, 1.5 units of weight of K 2 TiF 6 Mix well in a graphite crucible. The above-mentioned graphite crucible is placed at the bottom of the closed reactor, and the 430 stainless steel substrate is suspended in the position where the compound is separated from the reactor. A mixture of nitrogen and argon is introduced into the reactor, the ratio of nitrogen is 12%, the temperature is raised to 800°C at a rate of 10°C / min and stabilized for 20 minutes, then the 430 stainless steel substrate is immersed in the molten compound for 2 Hour. After the deposition, the 430 stainless steel substrate was slowly lifted to the position where the molten compound was separated from the reactor and cooled to room temperature with the furnace. After the 430 stainless steel substrate was taken out, it was ultrasonically cleaned with w...

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Abstract

The invention discloses a method for preparing a TixNy coating in situ by utilizing a molten salt disproportionation reaction and a product with the TixNy coating. According to the method, titanium atoms generated by disproportionation characteristics of titanium ions in a middle valence state in molten salt and nitrogen dissolved in the molten salt are subjected to in-situ combination on the surface of a base material to form the TixNy coating, and the obtained TixNy coating is continuous, compact, uniform in thickness, and well combined with the base material. The method is simple in preparation process and easy to implement, and effectively solves the problems that equipment and process routes required by the traditional preparation technology of a transition metal nitride coating are complex, the coating is difficult to deposit on the inner surface or complex surface of a workpiece, the coating has microdefects, the adhesion between the coating and the base material is poor and thelike; and the method has the advantages of high efficiency, energy conservation, environmental protection, low cost, easiness in large-scale production and the like. The product is provided with theTixNy coating, and the TixNy coating is high in hardness, good in wear resistance, good in chemical stability, not easy to fall off, long in service life and good in comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of transition metal nitride coatings, in particular to an in-situ preparation of Ti by molten salt disproportionation reaction x N y Coating method and articles thereof. Background technique [0002] Ti x N y Due to the advantages of high hardness, good wear resistance, high electrical conductivity and good chemical stability, it has attracted widespread attention. It can be used as wear-resistant coatings for cutting tools, protective coatings for parts in harsh environments, and anti-oxidation coatings. layers etc. Ti currently x N y Coating preparation methods mainly include reactive magnetron sputtering, ion beam assisted deposition, filtered arc deposition, pulsed laser deposition, multi-arc ion plating, etc. These methods have the disadvantages of complex equipment, difficult maintenance and the existence of microscopic defects in coatings prepared by some methods. Defects and other shortcomings...

Claims

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Application Information

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IPC IPC(8): C23C12/00C23C18/00
CPCC23C12/00C23C18/00
Inventor 杨凌旭刘会军曾潮流付超
Owner SONGSHAN LAKE MATERIALS LAB
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