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Multi-scale titanium carbide particle reinforced copper-based composite coating and preparation method and application thereof

A copper-based composite, 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 coating/substrate bonding strength, etc., and achieve good wear resistance. , the effect of less holes and high hardness

Active Publication Date: 2020-07-10
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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  • Multi-scale titanium carbide particle reinforced copper-based composite coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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; the preparation process of the graphene-spark oil mixed medium is as follows: Weigh 1.5g of the spark oil with the function of octadecylamine Chemically modified graphene powder (0.05-5 μm in size) is placed in 10L of general-purpose spark oil, and can be prepared after ultrasonic dispersion for 30 minutes with a concentration of 0.15g L -1 graphene-spark oil hybrid media. The spark discharge parameters are set as follows: peak current is 10A, pulse width is 8μs, pulse gap is 256μs, and discharge time is 30min. A copper-based composite coating containing large-diameter titanium carbide particles was obtained.

Embodiment 2

[0029] The difference from Example 1 is that the concentration of graphene in the graphene-spark oil mixed medium is 0.01g 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 that the concentration of graphene in the graphene-spark oil mixed medium is 0.5g 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 and a preparationmethod and application thereof. According to the coating, multi-scale titanium carbide particles serve as a reinforcing phase, copper and a copper-titanium intermetallic compound serve as a matrix, the mass fraction of the titanium carbide particles ranges from 50% to 75%, and the mass fraction of the copper and titanium-copper intermetallic compound ranges from 25% to 50%. The preparation methodof the coating comprises the following steps of clamping a sintered titanium electrode and the copper matrix on a negative electrode and a positive electrode of a spark machine tool correspondingly, immersing the sintered titanium electrode and the copper matrix in a graphene-spark oil mixed medium, and setting spark discharge parameters to prepare the copper-based composite coating containing thelarge-particle-size titanium carbide particles; and then performing aging treatment, and finally obtaining the composite coating. The hardness of the coating is 1100 HV0.2 to 1300 HV0.2, and the coating has the advantages of being low in friction coefficient (0.2-0.32) and low in specific wear rate (1.2-5.8*10<-5 >mm < 3 > N <-1 > m <-1 >) as a wear-resistant coating.

Description

technical field [0001] The invention belongs to the field of surface strengthening and surface modification, in particular to a copper-based composite coating reinforced with multi-scale titanium carbide particles and its preparation method and application. 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 applications of copper and its alloys. In particular, copper materials are prone to severe adhesive wear under the condition of no 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 hardness, corrosion resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00B22C9/06B22D11/059F41B6/00C01B32/921
CPCB22C9/061B22D11/059C23C26/00C01B32/921F41B6/00
Inventor 麦永津李仕林揭晓华梅少宇
Owner GUANGDONG UNIV OF TECH
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