Quaternary MAX phrase enhanced nickel base high temperature oxidation resisting composite material and synthetic method thereof

A technology for high-temperature anti-oxidation and composite materials, which is applied in the field of quaternary MAX phase reinforced nickel-based high-temperature anti-oxidation composite materials and their synthesis. , Excellent high temperature lubricating performance, the effect of improving high temperature oxidation resistance

Inactive Publication Date: 2019-11-01
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of lubricants will generally significantly reduce the oxidation resistance of the material under high temperature conditions, causing it to suffer severe oxidation under high temperature conditions, thereby affecting its use under high temperature conditions

Method used

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  • Quaternary MAX phrase enhanced nickel base high temperature oxidation resisting composite material and synthetic method thereof
  • Quaternary MAX phrase enhanced nickel base high temperature oxidation resisting composite material and synthetic method thereof
  • Quaternary MAX phrase enhanced nickel base high temperature oxidation resisting composite material and synthetic method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The NiAl material was prepared by hot pressing sintering technology, and the weighed powder was loaded into a graphite grinding tool. Before powder loading, a layer of graphite paper is laid on the wall of the graphite grinding tool to prevent the powder from sticking to the graphite grinding tool during the sintering process. The NiAl material prepared by hot pressing and sintering is dense and uniform. The composite exhibits excellent oxidation resistance under high temperature conditions. NiAl material is oxidized at 900°C, 1000°C, and 1100°C for 100 hours, respectively, and the oxidation weight gain per unit area is 4.42g / m 2 , 4.71g / m 2 , 4.75g / m 2 ,Such as figure 1 shown.

Embodiment 2

[0045] Preparation of homogeneously mixed nanostructured NiAl, Ti, Al and C powders by high energy ball milling

[0046] The powder weighed in proportion is put into a zirconia ball mill jar for high-energy ball milling to prepare a uniformly mixed nanostructure mixed powder, and then the mixed powder is loaded into a graphite mill. Before powder loading, a layer of graphite paper is laid on the wall of the graphite grinding tool to prevent the powder from sticking to the graphite grinding tool during the sintering process. The mixed powder with nanostructure has the effect of fine-grain strengthening, which can effectively improve the strength of composite materials. The Ti, Al and C powder added to the composite material can react in situ to form Ti during the high temperature vacuum sintering process 3 AlC 2 Phase, which has excellent high-temperature lubricating properties, can realize the high-temperature lubricating properties of composite materials. At the same time,...

Embodiment 3

[0048] Preparation of homogeneously mixed nanostructured NiAl, Cr, Ti, Al and C powders by high energy ball milling

[0049] NiAl intermetallic compound powder is 75-90wt%, Cr powder, Ti powder, Al powder and C powder are 10-25wt%, and the molar ratio of Cr powder, Ti powder, Al powder and C powder is 2:1:1:2 , put the powder weighed in proportion into a zirconia ball mill tank for high-energy ball milling, the mass ratio of the ball to material is (6-15):1, the rotation speed is 200-300r / min, the ball milling time is 15-25h, and the prepared particle size 10-60nm, mixed homogeneous nano-structure mixed powder, then put the mixed powder into a graphite grinding tool, and cold-pressed at a pressure of 5-15MPa.

[0050] Before powder loading, a layer of graphite paper is laid on the wall of the graphite grinding tool to prevent the powder from sticking to the graphite grinding tool during the sintering process. The mixed powder with nanostructure has the effect of fine-grain st...

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Abstract

The invention discloses a quaternary MAX phrase enhanced nickel base high temperature oxidation resisting composite material and a synthetic method thereof. The composite material is prepared throughthe following steps: respectively weighting NiAl, Cr, Ti, Al and a C powder in proportion, then putting the weighted powder into a high energy ball-milling machine for ball milling, so as to prepare auniformly mixed nano-structure mixed powder; putting the well mixed powder into a graphite grinding tool for cold pressing treatment, after cold pressing, carrying out vacuum hot-pressing sintering in a vacuum hot pressure sintering furnace, so as to prepare NiAl-Cr2TiAlC2 composite material. According to the invention, through in-situ reaction of Cr, Ti, Al and C in a sintering process, a novelquaternary MAX phrase (Cr2TiAlC2) is produced, and the high temperature lubrication performance of the composite material is realized, meanwhile, the wettability between MAX phase and NiAl matrix andthe organization structure of the composite material can be effectively improved, and the intensity of the composite material is effectively improved. Moreover, the oxidation resistance of the composite material under a high temperature condition can be remarkably improved, and the high temperature oxidation resisting composite material is prepared successfully.

Description

technical field [0001] The invention belongs to the technical field of high-temperature oxidation-resistant composite materials, and in particular relates to a quaternary MAX phase-reinforced nickel-based high-temperature oxidation-resistant composite material and a synthesis method thereof. Background technique [0002] In recent years, my country's aerospace, nuclear industry and other high-tech industries have developed rapidly, and high-temperature moving parts in these fields also have serious friction and wear problems, which will seriously affect the reliability and stability of the entire equipment operation, and further affect The service life of the entire equipment. Therefore, it is urgent to use the basic knowledge of materials science and tribology theory to design and construct a high-temperature lubricating composite material with excellent friction and wear properties at higher temperatures to meet the rapid development of my country's aerospace, nuclear indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F3/10B22F9/04C22C1/05C22C19/05
CPCB22F3/1039B22F3/14B22F9/04B22F2009/043C22C1/058C22C19/058
Inventor 李博高义民李聪康云川郑巧玲赵四勇
Owner XI AN JIAOTONG UNIV
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