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A wide temperature range ni with cu@ni core-shell structure as lubricating phase 3 Al-based self-lubricating composite material and preparation method thereof

A core-shell structure and composite material technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of limited service life of coatings, reduced mechanical properties of materials, restricted application, etc., achieve good compactness, improve synthesis efficiency, The effect of saving synthesis cost

Active Publication Date: 2022-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limited service life of the coating itself and the surface texture will damage the surface of the material to a certain extent and reduce the mechanical properties of the material, thus restricting its wider application in high-temperature lubricating materials

Method used

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  • A wide temperature range ni with cu@ni core-shell structure as lubricating phase <sub>3</sub> Al-based self-lubricating composite material and preparation method thereof
  • A wide temperature range ni with cu@ni core-shell structure as lubricating phase <sub>3</sub> Al-based self-lubricating composite material and preparation method thereof
  • A wide temperature range ni with cu@ni core-shell structure as lubricating phase <sub>3</sub> Al-based self-lubricating composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wide temperature range Ni with Cu@Ni core-shell structure as the lubricating phase 3 Al-based self-lubricating composite materials, the weight composition of its raw materials are: respectively according to Ni 3 10wt.% and 10wt.% of the total mass of Al alloy powder are selected from the above-mentioned Cu@Ni powder and Mo powder; wherein Ni 3 Al is made of Ni powder and Al powder with a molar ratio of Ni:Al=3:1. Sample number NA10.

[0027] The preparation process steps of this example are as follows:

[0028] Step 1. First, the purity is greater than or equal to 95%, and the 200-300 mesh Ni powder and Al powder are weighed according to the following ratio, and the molar ratio Ni:Al=3:1.

[0029] Step 2. Put the ingredients obtained in step 1 into a zirconia ball mill tank for mechanical alloying. The ball milling speed is 200rpm, the continuous ball milling time is 35 hours, the mass ratio of balls to materials is 10:1, and the ball milling process control agent ...

Embodiment 2

[0036] A wide temperature range Ni with Cu@Ni core-shell structure as the lubricating phase 3 Al-based self-lubricating composite materials, the weight composition of its raw materials are: respectively according to Ni 3 10wt.% and 10wt.% of the total mass of Al alloy powder are selected from the above-mentioned Cu@Ni powder and Mo powder; wherein Ni 3 Al is made of Ni powder and Al powder with a molar ratio of Ni:Al=3:1. Sample number NA15.

[0037] The preparation process steps of this example are as follows:

[0038] Step 1. First, the purity is greater than or equal to 95%, and the 200-300 mesh Ni powder and Al powder are weighed according to the following ratio, and the molar ratio Ni:Al=3:1.

[0039]Step 2. Put the ingredients obtained in step 1 into a zirconia ball mill tank for mechanical alloying. The ball milling speed is 200rpm, the continuous ball milling time is 35 hours, the mass ratio of balls to materials is 10:1, and the ball milling process control agent i...

Embodiment 3

[0047] A wide temperature range Ni with Cu@Ni core-shell structure as the lubricating phase 3 Al-based self-lubricating composite materials, the weight composition of its raw materials are: respectively according to Ni 3 10wt.% and 10wt.% of the total mass of Al alloy powder are selected from the above-mentioned Cu@Ni powder and Mo powder; wherein Ni 3 Al is made of Ni powder and Al powder with a molar ratio of Ni:Al=3:1. Sample number NA20.

[0048] The preparation process steps of this example are as follows:

[0049] Step 1. First, the purity is greater than or equal to 95%, and the 200-300 mesh Ni powder and Al powder are weighed according to the following ratio, and the molar ratio Ni:Al=3:1.

[0050] Step 2. Put the ingredients obtained in step 1 into a zirconia ball mill tank for mechanical alloying. The ball milling speed is 200rpm, the continuous ball milling time is 35 hours, the mass ratio of balls to materials is 10:1, and the ball milling process control agent ...

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Abstract

The invention discloses a wide temperature range Ni with Cu@Ni core-shell structure as the lubricating phase 3 Al-based self-lubricating composite material, the composite material is composed of Cu@Ni core-shell powder, Ni 3 It is prepared from Al alloy powder and Mo powder, and the mass of Cu@Ni and Mo powder added are respectively Ni 3 10~20wt.% and 10wt.% of the total mass of Al alloy powder. Ni 3 The Al-based alloy is a pre-mechanical alloyed powder, and its composition and atomic percentage of each component are: Ni:Al=3:1. The invention also discloses a preparation method of the composite material. The composite material is prepared by vacuum hot pressing sintering technology. The composite material of the invention has excellent high-temperature tribological properties in the temperature range from room temperature to 800°C. The composite material of the invention is suitable for making components such as bearings, bushings, sliders and seals used in the range from room temperature to 800°C, and has broad application prospects in the fields of aerospace, nuclear power and the like.

Description

technical field [0001] The invention relates to a wide temperature range Ni with Cu@Ni core-shell structure as the lubricating phase 3 Al-based self-lubricating composite material and preparation method thereof. The composite material is suitable for making moving parts such as engine high-temperature bearings, and its working temperature can range from room temperature to 800°C. Background technique [0002] In recent years, with the rapid development of high-tech industries such as aerospace, nuclear power, and energy power, the anti-friction and wear resistance and long-term Lifetime lubrication puts higher demands on it. Most liquid lubricants tend to fail due to material decomposition, oxidation and other reasons at high temperatures and cannot work properly. Therefore, solid lubricants are often used in high temperature lubricating materials. Commonly used MoS 2 Solid lubricants such as graphite, soft metals and metal oxides can only provide good lubrication in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/14B22F1/00B22F9/04C22C19/03
CPCB22F3/14B22F9/04C22C19/03B22F2009/043B22F1/105
Inventor 何乃如黄琰文怀兴贾均红
Owner SHAANXI UNIV OF SCI & TECH
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