A multi-scale titanium carbide particle reinforced copper-based composite coating and its preparation method and application

A copper-based composite and particle-reinforced technology, applied in the direction of titanium carbide, coating, carbide, etc., can solve the problems of low production efficiency, harsh production conditions, low bonding strength of coating/matrix, etc., and achieve good wear resistance , uniform and stable spark discharge, high hardness effect

Active Publication Date: 2022-03-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as harsh production conditions, low production efficiency, and low coating / substrate bonding strength.

Method used

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  • A multi-scale titanium carbide particle reinforced copper-based composite coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The sintered titanium electrode and the copper substrate were clamped to the negative and positive electrodes of the spark machine, respectively, and immersed in the graphene-spark oil mixed medium; the preparation process of the graphene-spark oil mixed medium was as follows: Weigh 1.5 g of the octadecylamine functionalized The chemically modified graphene powder (size 0.05-5μm) was placed in 10L general-purpose spark oil, and the concentration of 0.15g·L was obtained after ultrasonic dispersion for 30min. -1 Graphene-spark oil mixed medium. The spark discharge parameters are set as follows: the peak current is 10A, the pulse width is 8μs, the pulse gap is 256μs, and the discharge time is 30min. A copper-based composite coating containing large-diameter titanium carbide particles was prepared.

Embodiment 2

[0029] The difference from Example 1 is: the concentration of graphene in the graphene-spark oil mixed medium is 0.01 g·L -1 , the spark discharge parameters are set as follows: the peak current is 15A, the pulse width is 16μs, the pulse gap is 128μs, and the discharge time is 10min.

Embodiment 3

[0031] The difference from Example 1 is: the concentration of graphene in the graphene-spark oil mixed medium is 0.5 g·L -1 , the spark discharge parameters are set as follows: the peak current is 5A, the pulse width is 64μs, the pulse gap is 256μs, and the discharge time is 60min.

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Abstract

The invention belongs to the field of surface strengthening and surface modification, and discloses a multi-scale titanium carbide particle-reinforced copper-based composite coating, a preparation method and application thereof. The coating uses multi-scale titanium carbide particles as the reinforcing phase, copper and copper-titanium intermetallic compounds as the matrix, the mass fraction of titanium carbide particles is 50-75%, and the mass fraction of copper and titanium-copper intermetallic compounds is 25-50% %. The preparation of the coating includes the following steps: the sintered titanium electrode and the copper substrate are respectively clamped on the negative electrode and the positive electrode of the spark machine tool, and immersed in the graphene-spark oil mixed medium, and the spark discharge parameters are set to obtain a large particle size carbonized Copper-based composite coating of titanium particles; followed by aging treatment to finally obtain a composite coating. The hardness of the coating is 1100‑1300HV 0.2 , as a wear-resistant coating has a low coefficient of friction (0.2‑0.32), less specific wear rate (1.2‑5.810 ‑5 mm 3 N ‑1 m ‑1 )The advantages.

Description

technical field [0001] The invention belongs to the field of surface strengthening and surface modification, and particularly relates to a multi-scale titanium carbide particle reinforced copper-based composite coating and a preparation method and application thereof. Background technique [0002] Copper and its alloys have good electrical conductivity, thermal conductivity, plasticity and fatigue resistance, so they are widely used in electric power, metallurgy, machinery, aviation, aerospace and other fields. However, low hardness and poor wear resistance still limit the industrial application of copper and its alloys. In particular, copper materials are easy to cause serious adhesive wear under the condition of non-lubricating medium, which greatly limits the engineering application of copper friction components. Copper surface modification technology can not only maintain the good electrical and thermal conductivity of copper itself, but also enhance its surface hardnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/00B22C9/06B22D11/059F41B6/00C01B32/921
CPCC23C26/00B22C9/061B22D11/059F41B6/00C01B32/921
Inventor 麦永津李仕林揭晓华梅少宇
Owner GUANGDONG UNIV OF TECH
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