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Preparation method and application of MAX-phase enhanced nickel-based high-temperature lubricating composite material

A composite material and high-temperature technology, which is applied in the direction of mechanical equipment, jet propulsion devices, engine components, etc., can solve the problems of poor bonding between the reinforcement phase and the matrix interface, and achieve excellent high-temperature mechanical properties, good bonding, excellent corrosion resistance and resistance The effect of wear properties

Active Publication Date: 2019-04-23
咸阳瞪羚谷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as poor bonding between the reinforcing phase and the matrix interface. Therefore, the preparation of solid lubricants with better metal wettability and pure interface bonding is the key to the development of high-performance solid lubricants.

Method used

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  • Preparation method and application of MAX-phase enhanced nickel-based high-temperature lubricating composite material
  • Preparation method and application of MAX-phase enhanced nickel-based high-temperature lubricating composite material

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preparation example Construction

[0031] The invention discloses a method for preparing a novel MAX phase reinforced nickel-based high-temperature lubricating composite material. The nickel-based composite material is synthesized by powder metallurgy, and the MAX phase ceramic particles are used as a reinforcing phase to effectively improve the mechanical properties and high-temperature tribological properties of the matrix material. Performance, so that the composite material exhibits excellent comprehensive performance, the specific steps are as follows:

[0032] S1. According to the molar ratio Ti:Si:TiC=1:1:(1.8~2.5), weigh Ti powder, Si powder and TiC powder, ball-to-material ratio (5~10):1, put it in a ball mill jar, seal it, and Mill on a planetary ball mill at a speed of 20-100r / min for 3-6 hours;

[0033] NiAl and Ti in nickel-based high-temperature lubricating composite materials 3 SiC 2 The phase contents are 60-90% and 10-40%, respectively.

[0034] S2. Form the uniformly mixed powder compact, pla...

Embodiment 1

[0041] According to the molar ratio of different elements Ti: Si: TiC = 1:1:1.8, weigh Ti powder, Si powder and TiC powder, the ball material ratio is 5:1, put it in the ball mill pot, seal it, and put it on the planetary ball mill at 20r Ball mill at a speed of 1 / min for 3 hours; the uniform raw material powder is screened with a 100-mesh sieve; placed in a 6mm graphite mold coated with boron nitride, a unidirectional load of 5MPa is applied perpendicular to the direction of the sample, pressed into shape, and dried in a drying oven for 1h , put the green body in a vacuum sintering furnace, heat it up to 1300°C at a heating rate of 10°C / min, hold it for 30min, sinter without pressure in a protective atmosphere, and cool to room temperature with the furnace to obtain a loose block Ti 3 SiC 2 ceramics; the Ti 3 SiC 2 The ceramics are put into the jaw crusher and crushed into small particles of 5mm, and then the small particles continue to be crushed to obtain particles smalle...

Embodiment 2

[0044] According to the molar ratio of different elements Ti: Si: TiC = 1:1:2, weigh Ti powder, Si powder and TiC powder, the ball-to-material ratio is 7:1. Ball milling at a speed of 1 / min for 4 hours; the uniform raw material powder was screened with a 120-mesh sieve; placed in a 60mm graphite mold coated with boron nitride, a unidirectional load of 10MPa was applied perpendicular to the direction of the sample, pressed into shape, and dried in a drying oven for 2 hours. Put the green body in a vacuum sintering furnace, heat it up to 1350°C at a heating rate of 12°C / min, hold it for 15 minutes, sinter it without pressure in a protective atmosphere, and cool it to room temperature with the furnace to obtain a loose block Ti 3 SiC 2 ceramics; the Ti 3 SiC 2 The ceramics are put into the jaw crusher and crushed into small particles of 10mm, and then the small particles are continued to be crushed to obtain particles smaller than 2mm; Ti 3 SiC 2 NiAl and NiAl accounted for 2...

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Abstract

The invention discloses a preparation method and application of a MAX-phase enhanced nickel-based high-temperature lubricating composite material. The preparation method comprises the following steps:carrying out mechanical mixing on Ti powder, Si powder and TiC powder; preparing loose block-shaped Ti3SiC2 ceramic through a powder metallurgy method; then carrying out crushing and ball-milling treatment on the prepared loose block-shaped Ti3SiC2 ceramic, so as to obtain Ti3SiC2 ceramic powder; then carrying out mechanical mixing on the sieved Ti3SiC2 powder and NiAl powder; compacting and molding; and finally, preparing a block-shaped NiAl-Ti3SiC2 composite material through hot-pressing sintering, wherein the phase content of NiAl and Ti3SiC2 in the block-shaped NiAl-Ti3SiC2 composite material is 60 to 90 percent and 10 to 40 percent respectively. The NiAl composite high-temperature lubricating material is prepared by adopting the powder metallurgy method and the self-lubricating performance of hot-pressing sintering and synthesis in the composite material is better than that of Ti3SiC2-phase ceramic of graphite and MoS2; and meanwhile, an NiAl alloy has excellent corrosion resistance and abrasion resistance, and has good sintering performance, so that NiAl alloy powder is selected as a matrix of the composite material.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method and application of a novel MAX phase-reinforced nickel-based high-temperature lubricating composite material. Background technique [0002] With the rapid development of modern industrial technology, especially the development of space technology and aviation industry, traditional lubricating grease can no longer meet the requirements of extreme working conditions, and solid lubricating materials have emerged as the times require. Solid lubricating materials break through the service limit of traditional grease lubrication, and achieve good lubricating effects in some harsh working conditions such as ultra-high vacuum, strong radiation, high temperature, and ultra-low temperature. Particle-reinforced metal matrix composites can improve the strength of the material and its wear resistance by introducing a dispersed reinforcement phase i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C32/00C22C19/03C04B35/56C04B35/622F02C7/00F02F1/00
CPCC04B35/5615C04B35/622C04B2235/3843C04B2235/404C04B2235/428C04B2235/6562C04B2235/6567C04B2235/661C22C1/05C22C19/007C22C19/03C22C32/0052F02C7/00F02F1/004
Inventor 李博高义民李聪郑巧玲李烨飞刘志伟赵梓翔赵四勇
Owner 咸阳瞪羚谷新材料科技有限公司
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