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NiAl-NbC-Ag wide-temperature-range self-lubricating composite material and preparation method thereof

A composite material and ball-to-material ratio technology, applied in the field of NiAl-NbC-Ag wide temperature range self-lubricating composite material and its preparation, can solve the problems of deterioration of comprehensive mechanical properties of materials, lack of systematic and in-depth research, and limited engineering applications, etc. Achieve the effect of improving mechanical properties, improving interface compatibility, and optimizing mechanical properties

Inactive Publication Date: 2021-06-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used single solid lubricants are difficult to achieve good lubricating performance from room temperature to high temperature, but the compounding of multiple solid lubricants may achieve this goal
Although compounding multiple lubricants can achieve continuous lubrication within a certain temperature range, the addition of multiple lubricants will produce a large number of phase interfaces with poor compatibility with the alloy matrix, which will lead to a significant deterioration of the comprehensive mechanical properties of the material, thereby limiting its performance. Engineering Applications
However, there are few literature reports on the strength design and phase interface control of continuous lubricating materials in a wide temperature range, and there is a lack of systematic and in-depth research.

Method used

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  • NiAl-NbC-Ag wide-temperature-range self-lubricating composite material and preparation method thereof

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preparation example Construction

[0029] As a specific embodiment of the present invention, a method for preparing a NiAl-NbC-Ag wide temperature range self-lubricating composite material of the present invention specifically includes the following steps:

[0030] (1) AgNbO 3 Preparation of powders: Separately use a mortar for Nb 2 o 5 and AgNO 3 The powders are fully ground with zirconia balls respectively, and the ball-to-material ratio is 10:1. In order to reduce the cold welding effect during the grinding process, 5ml of methanol solution is added to every 10g of powder during the grinding process, and the rotation speed is 200-250 rpm. minutes, ball milling time is 8~10h; then Nb 2 o 5 and AgNO 3 Mix the powders well, put the mixed powders in a corundum crucible, heat in a muffle furnace in the air at a high temperature of 800-880°C for 5-8 hours, then cool naturally with room temperature, and finally obtain AgNbO3 powder.

[0031] (2) Preparation of NiAl intermetallic compound powder: Mix commercia...

Embodiment 1

[0034] (1) AgNbO 3 Preparation of powders: Separately use a mortar for Nb 2 o 5 and AgNO 3 The powders are fully ground with zirconia balls; the ball-to-material ratio is 10:1. In order to reduce the cold welding effect during the grinding process, 5ml of methanol solution is added to every 10g of powder during the grinding process, and the speed is 200 rpm. The ball milling time is 8h; then the Nb 2 o 5 and AgNbO 3 The powders are fully mixed; the mixed powders are placed in a corundum crucible, heated in a muffle furnace in the air at a high temperature of 800 ° C for 5 hours, and then cooled naturally with room temperature to finally obtain AgNbO 3 powder.

[0035] (2) Preparation of NiAl intermetallic compound powder: Mix commercially available nickel powder (58 μm, 99.6% purity) and aluminum powder (48 μm, 99.95% purity) in a mass ratio of 1:1, using a high-energy ball mill, and the grinding parameters are : The ball milling speed is 250 rpm, the ball milling time ...

Embodiment 2

[0039] (1) AgNbO 3 Preparation of powders: Separately use a mortar for Nb 2 o 5 and AgNO 3 The powders are fully ground with zirconia balls; the ball-to-material ratio is 10:1. In order to reduce the cold welding effect during the grinding process, 5ml of methanol solution is added per 10g of powder during the grinding process, and the speed is 220 rpm. The ball milling time is 9h; then the Nb 2 o 5 and AgNbO 3 The powders are fully mixed; the mixed powders are placed in a corundum crucible, heated in a muffle furnace in air at a high temperature of 830 ° C for 6 hours, and then naturally cooled with room temperature to obtain AgNbO 3 powder.

[0040] (2) Preparation of NiAl intermetallic compound powder: Mix commercially available nickel powder (58 μm, 99.6% purity) and aluminum powder (48 μm, 99.95% purity) in a mass ratio of 1:1, using a high-energy ball mill, and the grinding parameters are : The ball milling speed is 220 rpm, the grinding time is 63 hours, the grin...

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Abstract

The invention discloses a NiAl-NbC-Ag wide-temperature-range self-lubricating composite material and a preparation method thereof. The NiAl-NbC-Ag wide-temperature-range self-lubricating composite material is prepared from 60%-90% by mass of NiAl powder and 10%-40% by mass of AgNbO3 powder through a powder metallurgy process. According to the invention, a friction part can be ensured to have higher bearing capacity and certain wide-temperature-range self-lubricating performance, and a phase interface formed by adding various solid lubricants is prevented, so that the interface compatibility is improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature and high-strength lubricating composite materials, and in particular relates to a NiAl-NbC-Ag wide temperature range self-lubricating composite material and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the service environment of modern industrial machinery and equipment is becoming increasingly harsh, such as high temperature, high speed, high load, high vacuum, etc. high demands. The development of structural materials that can serve in harsh environments and have good mechanical properties and anti-friction and anti-wear capabilities is one of the research hotspots in tribology. Metal-based high-temperature self-lubricating composite materials, as a metal-based composite material, have a series of excellent properties such as high temperature resistance, oxidation resistance, corrosion resistance, good thermal conduct...

Claims

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Application Information

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IPC IPC(8): C10M103/00B22F9/04B22F3/14B22F3/02
CPCC10M103/00B22F9/04B22F3/02B22F3/14B22F2009/043B22F2998/10C10M2201/05C10M2201/061
Inventor 贾均红孙航丰晓春苟海龙蔡粮臣杨鑫然
Owner SHAANXI UNIV OF SCI & TECH
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