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A nial-based self-lubricating material with ag and mo-b-o-si quaternary plate crystals as a composite lubricating phase and a reinforcing phase and a preparation method thereof

A technology of plate crystals and lubricating materials, which is applied in the field of NiAl-based self-lubricating materials and their preparation, can solve the problems of material mechanical properties degradation, limited tribological properties, and ineffective improvement of lubricating properties, and achieve stable sintering reactions and improved The effect of synthesis efficiency and novel preparation method

Inactive Publication Date: 2017-05-17
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of a small amount of lubricating phase in the composite material has no obvious effect on improving the lubricating performance; while adding too much lubricating phase will reduce the mechanical properties of the material
Adding a single lubricating phase or enhancing the tribological properties of NiAl alloys is very limited

Method used

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  • A nial-based self-lubricating material with ag and mo-b-o-si quaternary plate crystals as a composite lubricating phase and a reinforcing phase and a preparation method thereof
  • A nial-based self-lubricating material with ag and mo-b-o-si quaternary plate crystals as a composite lubricating phase and a reinforcing phase and a preparation method thereof
  • A nial-based self-lubricating material with ag and mo-b-o-si quaternary plate crystals as a composite lubricating phase and a reinforcing phase and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown, a kind of preparation method using Ag powder and Mo-B-O-Si quaternary plate crystal as lubricating phase and the NiAl base self-lubricating material of strengthening phase, it comprises the steps:

[0035]1) According to the molar ratio of ammonium molybdate: boron powder: silicon powder = 1:2:2, select 0.32 grams of ammonium molybdate powder, 0.04 grams of boron powder and 0.04 grams of silicon powder, and mix ammonium molybdate powder, boron powder and silicon powder The powders are mixed by planetary ball mills to obtain the initial mixture of Mo-B-O-Si quaternary plate crystals; the ingredients after ball milling are sintered in an atmosphere furnace, and graphite powder is placed in the atmosphere sintering furnace. The sintering process is 550 ° C for 3 hours, and the protective gas is argon. In the sintering process, oxygen is introduced, and the amount of oxygen introduced is 50-150ml / min, so as to obtain the Mo-B-O-Si quaternary plate-sh...

Embodiment 2

[0042] 1) According to the molar ratio of ammonium molybdate: boron powder and silicon powder = 1:2:2, select 0.56 grams of ammonium molybdate powder, 0.07 grams of boron powder and 0.07 grams of silicon powder, and mix ammonium molybdate powder, boron powder and silicon powder The powders are mixed by planetary ball mill to obtain the initial mixture of Mo-B-O-Si quaternary plate crystals; the ingredients after ball milling are sintered in an atmosphere furnace, and graphite powder is placed in the atmosphere sintering furnace. The sintering process is 600 ° C for 2.5 hours, and the protective gas is argon gas, and oxygen is fed during the sintering process, and the oxygen feeding rate is 50-150ml / min to obtain the Mo-B-O-Si quaternary plate-shaped crystal.

[0043] 2) Select 13.0 grams of Ni powder, 7.0 grams of Al powder, 1.5 grams of Ag powder and 0.7 grams of the plate-shaped crystal prepared above according to the molar ratio of Ni:Al = 1:1; Ni powder, Al powder, Ag powde...

Embodiment 3

[0048] 1) According to the molar ratio of ammonium molybdate: boron powder and silicon powder = 1:2, select 0.8 g ammonium molybdate powder, 0.1 g boron powder and 0.1 g silicon powder, and mix the ammonium molybdate powder, boron powder and silicon powder planetary Ball milling and mixing to obtain the initial mixture of Mo-B-O-Si quaternary plate crystals; after ball milling, the ingredients are sintered in an atmosphere furnace, graphite powder is placed in the atmosphere sintering furnace, the sintering process is 650 ° C for 2 hours, the protective gas is argon, and sintering Oxygen is introduced during the process, and the amount of oxygen introduced is 50-150ml / min to obtain the Mo-B-O-Si quaternary plate-shaped crystal.

[0049] 2) Select 13.0 grams of Ni powder, 7.0 grams of Al powder, 2.0 grams of Ag powder and 1.0 grams of the plate crystal prepared above according to the molar ratio of Ni:Al = 1:1; Ni powder, Al powder, Ag powder and Mo- B-O-Si quaternary plate cry...

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Abstract

The invention relates to a novel NiAl-based self-lubricating material using Ag and Mo-B-O-Si four-element platy crystals as a composite lubricating phase and a reinforcing phase and a preparation method of the novel NiAl-based self-lubricating material. The preparation method includes following steps: preparing the Mo-B-O-Si four-element platy crystals; selecting Ni powder and Al powder according to a molar ratio of Ni:Al=1:1, selecting the Mo-B-O-Si four-element platy crystals and Ag powder, and mixing the Mo-B-O-Si four-element platy crystals with the Ni powder, the Al powder and the Ag powder to obtain an ingredient; disposing the ingredient in a vibration mixing machine for dry mixing to obtain a sintered ingredient; subjecting the sintered ingredient to discharging plasma sintering to obtain the novel NiAl-based self-lubricating material. The self-lubricating material is low in friction coefficient and wear rate in the process of friction and wear and has excellent tribological performance, the preparation method is simple and novel, and process parameters are easy to control in the preparation process.

Description

technical field [0001] The invention relates to a NiAl-based self-lubricating material with Ag and Mo-B-O-Si quaternary plate crystals as composite lubricating phase and reinforcing phase and a preparation method thereof. Background technique [0002] Some mechanical parts operating in extreme working conditions such as high temperature, strong radiation, high vacuum and other environments are prone to lubrication failure. With the rapid development of modern industrial technology, especially aviation and aerospace technology, it is urgent to develop new solid lubricating composite materials with excellent properties such as high temperature resistance and wear resistance. NiAl intermetallic compound has the characteristics of high melting point, low density, high thermal conductivity and excellent oxidation resistance, so it has been widely valued as a new type of high-temperature structural material. ([1] Dong Hongxing, He Yuehui. Research progress of intermetallic compou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C19/03B22F3/105
CPCB22F3/105C22C1/05C22C19/03
Inventor 史晓亮黄玉春翟文正杨慷徐增师张奥沈桥邹佳亮章桥新
Owner WUHAN UNIV OF TECH
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