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Preparation method of nano-structure bimetallic oxide reinforced NiAl matrix high-temperature high-strength lubricating composite material

A bimetallic oxide and composite material technology, which is applied in the field of preparation of nanostructured bimetallic oxide reinforced NiAl-based high-temperature high-strength lubricating composite materials, can solve problems such as poor wettability, and achieve the goals of improving density, preventing oxidation, and increasing strength Effect

Active Publication Date: 2019-09-06
咸阳瞪羚谷新材料科技有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a nanostructured bimetallic oxide reinforced NiAl-based high-temperature, high-strength lubricating composite material, using BaO and TiO 2 Reaction during sintering to form BaTiO 3 High-temperature lubricant, further improving the high-temperature lubricating performance of the composite material, and at the same time, it can effectively improve the problem of poor wettability between the metal oxide and the NiAl matrix, and improve the strength of the composite material

Method used

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  • Preparation method of nano-structure bimetallic oxide reinforced NiAl matrix high-temperature high-strength lubricating composite material
  • Preparation method of nano-structure bimetallic oxide reinforced NiAl matrix high-temperature high-strength lubricating composite material
  • Preparation method of nano-structure bimetallic oxide reinforced NiAl matrix high-temperature high-strength lubricating composite material

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preparation example Construction

[0032] The invention discloses a method for preparing a nanostructure double metal oxide reinforced NiAl-based high-temperature high-strength lubricating composite material. Nanostructure mixed powder is prepared by high-energy ball milling, and a nanostructure composite material with uniform phase distribution is successfully prepared. BaO and TiO are used 2 Reaction occurs during high temperature sintering to form BaTiO 3 The high-temperature solid lubricant realizes the high-temperature lubrication performance of the composite material, and at the same time, effectively improves the problem of poor wettability between the metal oxide and the NiAl matrix, significantly improves the microhardness and compressive strength of the composite material, and realizes Composite materials have high strength, light weight and high temperature lubrication performance. Specific steps are as follows:

[0033] S1. Mixed powder ratio and ball milling

[0034] Weigh the powder according to...

Embodiment 1

[0043] The method of high-energy ball milling is used to prepare a uniformly mixed nanostructure mixed powder; the mass percentage of 75% NiAl and 25% BaO / TiO 2 Put it into a zirconia ball mill tank for high-energy ball milling, the mass ratio of balls to materials is 8:1, the rotation speed is 200r / min, the ball milling time is 10h, the particle size of the mixed powder is 10nm, the drying temperature is 80°C, and the time For 1 h, prepare a homogeneously mixed nanostructure mixed powder, and then put the mixed powder into a graphite grinding tool.

[0044] 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. BaO / TiO added to composites 2 On the one hand, the double metal oxide can effectiv...

Embodiment 2

[0048] The method of high-energy ball milling is used to prepare uniformly mixed nanostructure mixed powder. 85% NiAl and 15% BaO / TiO 2 Put it into a zirconia ball mill jar for high-energy ball milling, the mass ratio of the ball to material is 10:1, the rotation speed is 250r / min, the ball milling time is 15h, the particle size of the mixed powder is 30nm, the drying treatment temperature is 90°C, and the time for 1.5 h to prepare a homogeneously mixed nanostructure mixed powder, and then put the mixed powder into a graphite grinding tool.

[0049] 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. BaO / TiO added to composites 2 On the one hand, the double metal oxide can effectively impr...

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Abstract

The invention discloses a preparation method of a nano-structure bimetallic oxide reinforced NiAl matrix high-temperature high-strength lubricating composite material. Nano-structure mixed powder is prepared by adopting a high-energy ball milling method, and then old pressing treatment and vacuum hot-pressing sintering are adopted to prepare the nano-structure NiAl-Bao / TiO2 composite material withmicrohardness of 380-450 HV and compressive strength of 1,500-1,700 MPa. The composite material is prepared by the vacuum hot press sintering technology, so that the wettability between metal oxide and a NiAl matrix is improved, and the bonding strength between the oxide and the matrix is improved as well. A BaTiO3 high-temperature solid lubricant is generated by the reaction of Bao and TiO2 in the high-temperature sintering process, so that the high-temperature lubricating property of the material is achieved. Meanwhile, fine nanoparticles in the composite material have a fine crystal strengthening effect and are capable of effectively improving the strength of the composite material, and therefore the nano-structure high-strength lightweight high-temperature lubricating composite material is successfully prepared.

Description

technical field [0001] The invention belongs to the technical field of high-temperature high-strength lubricating composite materials, and in particular relates to a method for preparing a nanostructure double-metal oxide reinforced NiAl-based high-temperature high-strength lubricating composite material. Background technique [0002] In recent years, with the rapid development of high-tech industries such as my country's aerospace and nuclear industries, higher requirements have been placed on the mechanical and tribological properties of materials in service under extremely harsh conditions such as high temperature, high load, and high speed, such as: Lightweight, high temperature resistance and wear resistance, the strength, wear resistance and lubrication of related moving parts under harsh conditions have become the technical keys that affect the reliability and life of the entire equipment operation. Therefore, it is urgent to use the basic knowledge of materials scienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/04B22F3/14B22F9/04C22C1/05C22C19/03C22C21/00C22C32/00C22C1/10
CPCB22F3/04B22F3/14B22F9/04B22F2009/043C22C1/058C22C19/03C22C21/00C22C32/001
Inventor 李博高义民李聪康云川郑巧玲李烨飞皇志富赵四勇
Owner 咸阳瞪羚谷新材料科技有限公司
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