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NiAl intermetallic base solid self-lubricating composite material and preparation method thereof

An intermetallic compound, solid self-lubricating technology, applied in the field of NiAl intermetallic compound-based solid self-lubricating composite material and its preparation, can solve the problem of lubricant wettability, difficult control of interface reaction and interface structure, and insufficient improvement of lubricating performance. Obviously, the stability of the lubricant is difficult to guarantee, etc., to achieve the effects of excellent tribological properties, fast preparation, and reduced synthesis costs.

Inactive Publication Date: 2012-07-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Previous studies usually added solid lubricants to the NiAl matrix to prepare composite materials, deposited a lubricating coating on the surface of the NiAl matrix, doped the NiAl matrix with a reinforcement phase, or synthesized a simple reinforcement phase in situ. The effect of performance improvement is not obvious, and the addition of too much lubricant will lead to a significant decline in mechanical properties. At the same time, it is difficult to control the wettability of the lubricant and the substrate, the interface reaction and the interface structure, and the stability of the lubricant in the process of preparing the substrate. It is also difficult to guarantee the performance; while the lubricating coating has a limited life, once it fails, it will cause catastrophic consequences ([13] Li Jianliang. Research on high temperature tribological properties of solid lubricating materials and coatings in wide temperature range. Doctoral dissertation of Nanjing University of Science and Technology, 2009.9 .)
The improvement of the self-lubricating properties of NiAl alloys by simple reinforcement is very limited

Method used

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  • NiAl intermetallic base solid self-lubricating composite material and preparation method thereof
  • NiAl intermetallic base solid self-lubricating composite material and preparation method thereof
  • NiAl intermetallic base solid self-lubricating composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 Shown, the preparation method of NiAl intermetallic compound base solid self-lubricating composite material, it comprises the steps:

[0036] 1) Using Ni powder, Al powder, Mo powder, Nb powder, Fe powder and B powder as the base material, Ti 3 SiC 2 The powder (powder material) is the lubricant reinforcement phase, according to the molar ratio of Ni: Al: Mo: Nb: Fe: B=48: 50: 1: 1: 0.5: 0.02, weigh 6.4 grams of Ni powder, 3.06 grams of Al powder , 0.22 gram of Cr powder, 0.21 gram of Nb powder, 0.06 gram of Fe powder and 0.05 gram of B powder, a total of 10 g, mixed to obtain mixed powder; then add 0.5 gram of high-purity Ti 3 SiC 2 Powder (purity ≥ 99.5wt.%) is added to the above-mentioned mixed powder to obtain ingredients (batch);

[0037] 2) Put the above-mentioned ingredients and steel balls in a stainless steel vacuum ball mill tank, and wet-mill on a planetary ball mill for 5 hours; the wet-milling medium is alcohol; wherein: the speed of th...

Embodiment 2

[0042] The preparation method of NiAl intermetallic compound base solid self-lubricating composite material, it comprises the steps:

[0043] 1) Using Ni powder, Al powder, Mo powder, Nb powder, Fe powder and B powder as the base material, Ti 3 SiC 2 The powder is the lubricant reinforcement phase, according to the molar ratio of Ni:Al:Mo:Nb:Fe:B=48:50:1:1:0.5:0.02, weigh 6.4 grams of Ni powder, 3.06 grams of Al powder, 0.22 grams of Cr powder, 0.21 gram of Nb powder, 0.06 gram of Fe powder and 0.05 gram of B powder, a total of 10 g, mixed to obtain a mixed powder; then add 1.0 gram of high-purity Ti 3 SiC 2 Powder (purity ≥ 99.5wt.%) is added to the above mixed powder to obtain ingredients;

[0044] 2) Put the above-mentioned ingredients and steel balls in a stainless steel vacuum ball mill tank, and wet-mill on a planetary ball mill for 5 hours; the wet-milling medium is alcohol; wherein: the speed of the planetary ball mill is 180 rpm, and the mass ratio of balls to mate...

Embodiment 3

[0049] The preparation method of NiAl intermetallic compound base solid self-lubricating composite material, it comprises the steps:

[0050] 1) Using Ni powder, Al powder, Mo powder, Nb powder, Fe powder and B powder as the base material, Ti 3 SiC 2 The powder is the lubricant reinforcement phase, according to the molar ratio of Ni:Al:Mo:Nb:Fe:B=48:50:1:1:0.5:0.02, weigh 6.4 grams of Ni powder, 3.06 grams of Al powder, 0.22 grams of Cr powder, 0.21 gram of Nb powder, 0.06 gram of Fe powder and 0.05 gram of B powder, a total of 10 g, mixed to obtain mixed powder; then add 1.5 gram of high-purity Ti 3 SiC 2 Powder (purity ≥ 99.5wt.%) is added to the above mixed powder to obtain ingredients (batch);

[0051] 2) Put the above-mentioned ingredients and steel balls in a stainless steel vacuum ball mill tank, and wet-mill on a planetary ball mill for 5 hours; the wet-milling medium is alcohol; wherein: the speed of the planetary ball mill is 200 rpm, and the mass ratio of balls t...

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Abstract

The invention relates to a preparation method of a NiAl intermetallic base solid self-lubricating composite material containing Ti3SiC2 and C binary composite lubrication phase and wild phase TiC. The NiAl intermetallic base solid self-lubricating composite material is prepared from Ni powder, Al powder, Mo powder, Nb powder, Fe powder, B powder and Ti3SiC2 powder, wherein the molar ratio of Ni: Al: Mo: Nb: Fe: B=48: 50: 1: 1: 0.5: 0.02, and the addition quantity of the Ti3SiC2 powder is 5-20 weight percent of the total weight of the Ni powder, the Al powder, the Mo powder, the Nb powder, theFe powder and the B powder. The NiAl / Ti3SiC2-C / TiC intermetallic base solid self-lubricating composite material synthesized by the method has novel component design (intermetallic matrix+ composite lubrication phase+ wild phase), high density, good tribological properties and stable technological parameters. The preparation process is fast and simple, and the method is easily operated and is suitable for preparing NiAl intermetallic base solid self-lubricating composite materials with high performance.

Description

technical field [0001] The present invention relates to a kind of containing Ti 3 SiC 2 NiAl intermetallic compound-based solid self-lubricating composite material with C binary composite lubricating phase and reinforcing phase TiC and its preparation method. Background technique [0002] With the rapid development of modern technology, especially aviation and aerospace technology, some moving parts under extreme working conditions such as high temperature, ultra-low temperature, ultra-high vacuum, strong radiation and other environments have great influence on the high temperature resistance, wear resistance, radiation resistance, Corrosion resistance and other properties put forward higher and higher requirements, and it is urgent to develop new high-temperature-resistant self-lubricating and wear-resistant materials that break through the effective limit of traditional lubrication with solid lubrication technology, so as to effectively solve the problems of lubrication a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C30/00C22C1/05C22C1/10
Inventor 史晓亮王莽彭美超章桥新祝志伟徐增师翟文正冯四平张崧王玉伏
Owner WUHAN UNIV OF TECH
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