Preparation method of niobium boride base coating

A niobium boride and coating technology, which is applied in the coating, metal material coating process, molten spraying, etc., can solve the problems of large pollution, high coating porosity, low efficiency, etc., and achieve simple preparation process, overcome The effect of complex process and rich resources

Inactive Publication Date: 2017-12-15
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method for niobium boride-based coatings, using thermal spraying in-situ reaction to synthesize niobium boride-based multiphase ceramic coatings, which overcomes the complex process of preparing niobium boride coatings in the prior art , high energy consumption, high pollution, low efficiency, low coating thickness, high coating porosity, low bonding force between coating and substrate and difficult powder preparation

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  • Preparation method of niobium boride base coating
  • Preparation method of niobium boride base coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The first step is to prepare niobium oxide / boron carbide / aluminum composite powder for thermal spraying:

[0035] uniformly mixing aluminum powder with a particle size range of 0.1 to 10 microns, niobium oxide powder with a particle size range of 0.001 to 10 microns, and boron carbide powder with a particle size range of 0.001 to 10 microns to form a composite powder, wherein, The weight percentage of boron carbide powder accounting for the total mass of the three raw material powders is 5%, the weight percentage of the aluminum powder plus niobium oxide powder accounting for the total mass of the three raw material powders is 95%, and the weight ratio between the niobium oxide powder and the aluminum powder is Then be 60: 40, then evenly mix into binder polyvinyl alcohol, the weight ratio of this binder polyvinyl alcohol consumption is above-mentioned composite powder: binding agent=100: 0.1, is thus formulated for thermal spraying Niobium oxide / boron carbide / aluminum ...

Embodiment 2

[0041] The first step is to prepare niobium oxide / boron carbide / aluminum composite powder for thermal spraying:

[0042] Evenly mix aluminum powder with a particle size range of 0.1 micron to 10 microns, niobium oxide powder with a particle size range of 0.001 micron to 10 microns, and boron carbide powder with a particle size range of 0.001 micron to 10 microns to form a composite powder. Wherein boron carbide powder accounts for 12% by weight of the total mass of these three raw material powders, and the percentage by weight that aluminum powder plus niobium oxide powder accounts for the total mass of these three raw material powders is 88%, and the weight percentage between niobium oxide powder and aluminum powder The ratio is 75: 25, and then evenly mixed into the binder polyvinyl alcohol, the weight ratio of the binder polyvinyl alcohol is the above-mentioned composite powder: binder = 100: 1, thus being prepared for thermal spraying Niobium oxide / boron carbide / aluminum c...

Embodiment 3

[0050] Step 1: Formulate niobium oxide / boron carbide / aluminum composite powder for thermal spraying:

[0051] uniformly mixing aluminum powder with a particle size range of 0.1 to 10 microns, niobium oxide powder with a particle size range of 0.001 to 10 microns, and boron carbide powder with a particle size range of 0.001 to 10 microns to form a composite powder, wherein, Boron carbide powder accounts for 30% by weight of the total mass of the three raw material powders, aluminum powder plus niobium oxide powder accounts for 70% by weight of the total mass of the three raw material powders, and the weight ratio between niobium oxide powder and aluminum powder Then be 90: 10, then evenly mix into binder methyl cellulose, the weight ratio of this binder methyl cellulose consumption is above-mentioned composite powder: binder=100: 1.5, is thus formulated for heating Sprayed niobium oxide / boron carbide / aluminum composite powder;

[0052] The second step, metal matrix material pr...

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Abstract

The invention provides a preparation method of a niobium boride base coating, and relates to the field of plating of materials by use of boride. A niobium boride base multi-phase ceramic coating is formed in a composite mode through a thermal spraying in-situ reaction. The preparation method of the niobium boride base coating comprises the steps that niobium oxide/boron carbide/aluminum composite powder for thermal spraying is prepared; pretreatment of a metal matrix material is conducted; and preparation of the niobium boride base coating is conducted. The preparation method of the niobium boride base coating overcomes the defects that in the process of preparation of a niobium boride coating in the prior art, the technology is complex, the energy consumption is high, the pollution is serious, the efficiency is low, the coating thickness is small, the coating porosity is high, the force of combination between the coating and a matrix is low, and power preparation is difficult.

Description

technical field [0001] The technical solution of the invention relates to the plating of materials with borides, in particular to the preparation method of niobium boride-based coatings. Background technique [0002] Niobium (Nb) is located in the fifth subgroup of the periodic table, and its boride (NbB 2 ) has a hexagonal structure, and there is a strong interaction between the formed Nb-B bonds, which makes niobium boride have the advantages of high strength and high hardness. In addition, niobium boride also has a high melting point (3050°C) and high conductivity , good thermal conductivity, high chemical stability, low thermal expansion coefficient and superior performance of corrosion resistance. Compared with other transition metal borides, there are relatively few studies on niobium boride, but it has the performance not weaker than other transition metal borides, especially it has a higher ratio than zirconium boride (ZrB 2 ) and titanium boride (TiB 2 ) Higher s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06
CPCC23C4/06
Inventor 杨勇杨振珑陈学广张琪王磊褚振华董艳春张建新阎殿然
Owner HEBEI UNIV OF TECH
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