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Novel Ni3Al based self-lubricating material with hollow spherical powder as lubricating phase and preparation method

A technology of hollow spherical powder and lubricating materials, applied in the field of new Ni3Al-based self-lubricating materials and its preparation, can solve the problems of poor fracture toughness, limited application, low room temperature plasticity of intermetallic compounds, etc., and achieve good compactness and stable sintering reaction , The effect of stabilizing and excellent tribological properties

Inactive Publication Date: 2016-09-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but Ni 3 Al intermetallic compounds have low room temperature plasticity and poor fracture toughness, which limit their industrial applications

Method used

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  • Novel Ni3Al based self-lubricating material with hollow spherical powder as lubricating phase and preparation method
  • Novel Ni3Al based self-lubricating material with hollow spherical powder as lubricating phase and preparation method
  • Novel Ni3Al based self-lubricating material with hollow spherical powder as lubricating phase and preparation method

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Experimental program
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preparation example Construction

[0029] In the following examples, the hollow spherical powders are all made of MoS 2Prepared from powder and aqueous solution of sodium silicate containing auxiliary reagents. The present invention provides a specific preparation method, but does not limit the preparation method. Hollow spherical powders prepared by other methods that meet the requirements of the present invention are also suitable for the present invention.

[0030] The preparation method of the hollow spherical powder provided by the present invention is: selecting MoS 2 The powder is added to the sodium silicate aqueous solution containing auxiliary reagents to form a mixed solution, and the resulting mixed solution is dried to obtain powder particles; the powder particles are melted at high temperature, and the obtained droplet-shaped reactant is sprayed into water for condensation, and the upper layer on the water surface is collected The floating particles are the required hollow spherical powder after ...

Embodiment 1

[0033] A new type of Ni with hollow spherical powder as lubricating phase 3 Al-based self-lubricating material, which is prepared from Ni powder, Al powder and hollow spherical powder, wherein the molar ratio of Ni:Al is 3:1, and the mass of hollow spherical powder is 1.0wt of the total mass of Ni powder and Al powder. %, the hollow spherical powder is composed of lubricating phase MoS 2 composed of glass.

[0034] Such as figure 1 As shown, the above new type of Ni with hollow spherical powder as lubricating phase 3 The preparation method of Al base self-lubricating material, it comprises the steps:

[0035] 1) Select 13.0 grams of Ni powder, 7.0 grams of Al powder and 0.2 grams of the hollow spherical powder prepared above according to the molar ratio of Ni:Al=3:1; mix the Ni powder, Al powder and hollow spherical powder to obtain the ingredients;

[0036] 2) Put the above ingredients into a vibrating mixer for dry mixing. The outer tank of the vibrating mixing material ...

Embodiment 2

[0040] A new type of Ni with hollow spherical powder as lubricating phase 3 Al-based self-lubricating material, which is prepared from Ni powder, Al powder and hollow spherical powder, wherein the molar ratio of Ni:Al=3:1, and the mass of hollow spherical powder is 1.5wt of the total mass of Ni powder and Al powder. %, the hollow spherical powder is composed of lubricating phase MoS 2 composed of glass.

[0041] The above-mentioned novel Ni with hollow spherical powder as lubricating phase 3 The preparation method of Al base self-lubricating material, it comprises the steps:

[0042] 1) Select 13.0 grams of Ni powder, 7.0 grams of Al powder and 0.3 grams of the hollow spherical powder prepared above according to the molar ratio of Ni:Al=3:1; mix the Ni powder, Al powder and hollow spherical powder to obtain the ingredients;

[0043] 2) Put the above ingredients into a vibrating mixer for dry mixing. The outer tank of the vibrating mixing material is a steel tank with a buil...

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Abstract

The invention relates to a novel Ni3Al based self-lubricating material with hollow spherical powder as a lubricating phase. The novel Ni3Al based self-lubricating material is prepared from Ni powder, Al powder and the hollow spherical powder. The lubricating phase MoS2 and a glass phase serve as main chemical components of the hollow spherical powder, wherein the molar ratio of Ni to Al is 3:1, and the mass of the hollow spherical powder is (1.0-2.0)wt.% of the total mass of the Ni powder and the Al powder. According to the self-lubricating material, the hollow spherical powder is compounded in a Ni3Al matrix in situ; the obtained self-lubricating material is low in friction coefficient and wear rate in the friction wear process and has excellent tribology performance; and a preparation method is simple and novel, and technological parameters are easy to control in the preparation process.

Description

technical field [0001] The present invention relates to a kind of novel Ni with hollow spherical powder as lubricating phase 3 Al-based self-lubricating material and preparation method thereof. Background technique [0002] With the rapid development of modern industrial technology, especially aviation and aerospace technology, some moving parts under extreme working conditions such as high temperature, high load, strong radiation and other environments have put forward more and more requirements for the high temperature resistance and wear resistance of lubricating materials. The higher the requirements, the urgent need to develop solid lubrication technology and develop new self-lubricating anti-friction and wear-resistant materials to effectively solve the problem of lubrication failure of traditional lubricating materials under harsh working conditions. Ni 3 Al intermetallic compounds have been widely used in aviation, metallurgy, machinery, environmental protection in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/05C22C1/10B22F3/14
CPCB22F3/14C22C1/05C22C19/03
Inventor 史晓亮黄玉春杨慷翟文正徐增师张奥沈桥邹佳亮章桥新
Owner WUHAN UNIV OF TECH
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