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Wide temperature range self-lubricating vn-ag 2 moo 4 Composite material and its preparation method

A technology of vn-ag2moo4 and composite materials, which is applied in the field of wide temperature range self-lubricating VN-Ag2MoO4 composite materials and its preparation, can solve the problems that self-lubricating composite materials cannot meet the requirements of use, etc., and achieves easy production amplification, tight integration and improvement. The effect of friction and wear performance

Active Publication Date: 2021-08-10
XIAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a wide temperature range self-lubricating VN-Ag 2 MoO 4 Composite material and its preparation method, in order to overcome the problem that the existing self-lubricating composite material cannot meet the use requirements when serving under the harsh working conditions of high temperature and wide temperature range in the prior art

Method used

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  • Wide temperature range self-lubricating vn-ag <sub>2</sub> moo <sub>4</sub> Composite material and its preparation method
  • Wide temperature range self-lubricating vn-ag <sub>2</sub> moo <sub>4</sub> Composite material and its preparation method

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preparation example Construction

[0033] A method for preparing a nickel-based self-lubricating composite material in a wide temperature range, comprising the steps of:

[0034] 1) Weigh 85-95% of VN powder and 5-15% of Ag by weight 2 MoO 4 powder, to obtain the original ingredient;

[0035] 2) Using a planetary ball mill to perform mechanical alloying of the original ingredients to obtain a uniform mixed powder;

[0036] 3) Put the mixed powder into a graphite abrasive tool, and prepare it by hot pressing and sintering technology under vacuum protection to obtain a continuous self-lubricating composite material in a wide temperature range.

[0037] The VN powder is purchased from the market with an average particle size of 15 μm; the Ag 2 MoO 4 The powder is chemically synthesized or purchased from the market, with an average particle size of 10 μm.

[0038] As a further improvement of the above preparation method, the ball-to-material ratio in the ball milling process in step 2) is 3:1-5:1, the ball-milli...

Embodiment 1

[0041] Embodiment 1 The wide temperature range self-lubricating VN-Ag 2 MoO 4 Composite material and preparation method thereof, carry out according to the following steps:

[0042] (1) According to VN powder mass fraction is 90%, Ag 2 MoO 4 The massfraction of powder is the ratio batching of 10%, weighs 90 grams of silver powder and Ag 2 MoO 4 Powder 10 grams obtains original batching, wherein the average particle diameter of VN powder is 15 μ m, Ag 2 MoO 4 The average particle size of the powder is 10 μm;

[0043] (2) The original ingredients are placed in a planetary ball mill, and the ball-to-material ratio is 3:1, the rotating speed is 100r / min, and the ball mill is mixed for 10 hours to obtain evenly mixed sintered ingredients;

[0044] (3) Put the sintering ingredients into a graphite mold, and carry out hot-press sintering in a vacuum environment, wherein the sintering temperature is 1650°C, the heating rate is 5°C / min, the sintering pressure is 20MPa, and the h...

Embodiment 2

[0045] Example 2 Wide temperature range self-lubricating VN-Ag 2 MoO 4 Composite material and preparation method thereof, carry out according to the following steps:

[0046] (1) According to VN powder mass fraction is 95%, Ag 2 MoO 4 The massfraction of powder is the ratio batching of 5%, weighs 95 grams of silver powder and Ag 2 MoO 4 5 grams of powder to obtain the original ingredients, wherein the average particle size of VN powder is 15 μm, Ag 2 MoO 4 The average particle size of the powder is 10 μm;

[0047] (2) The original ingredients are placed in a planetary ball mill, and the ball-to-material ratio is 5:1, the rotating speed is 300r / min, and the ball mill is mixed for 5 hours to obtain evenly mixed sintering ingredients;

[0048] (3) Put the sintering ingredients into a graphite mold, and perform hot-press sintering in a vacuum environment, wherein the sintering temperature is 1700°C, the heating rate is 10°C / min, the sintering pressure is 20MPa, and the hold...

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Abstract

A wide temperature range self-lubricating VN-Ag of the present invention 2 MoO 4 Composite materials and methods for their preparation. In order to overcome the problem existing in the prior art that the existing self-lubricating composite materials cannot meet the service requirements when serving under severe working conditions of high temperature and wide temperature range. A wide temperature range self-lubricating VN-Ag of the present invention 2 MoO 4 Composite material, its mass composition is: the silver molybdate powder of 85-95% VN powder and 5-15%; Described silver molybdate powder is Ag 2 MoO 4 Phase structured powder; wide temperature range self-lubricating VN‑Ag 2 MoO 4 The preparation method of composite material is: 1) with the VN powder of 85-95% and the Ag of 5-15% 2 MoO 4 Powder mixing, wet ball milling, drying and sieving to obtain the mixed powder; 2) Put the mixed powder into the graphite grinding tool for cold pressing; 3) Put the graphite grinding tool with the mixed powder under vacuum protection Hot pressing and sintering to obtain wide temperature range self-lubricating VN‑Ag 2 MoO 4 composite material.

Description

technical field [0001] The invention relates to the technical field of ceramic-based self-lubricating composite materials, more specifically, to a wide temperature range self-lubricating VN-Ag 2 MoO 4 Composite materials and methods for their preparation. Background technique [0002] With the continuous development of high-tech industries such as aerospace and nuclear power, more and more friction pair parts need to serve in harsh working conditions of high temperature and wide temperature range. Grinding performance has received extensive attention and research. Therefore, the lubrication and wear resistance of the above-mentioned components in a wide temperature range environment has become the key to the reliability and life of the entire system, and higher and higher requirements are put forward for the lubrication performance of its materials. High-performance structural ceramics have high strength, high hardness, good oxidation resistance and high-temperature chemi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/16B22F3/14C22C1/04
CPCB22F3/14B22F2999/00C22C1/04C22C29/005C22C29/16B22F2201/20
Inventor 刘二勇杜双明陈树
Owner XIAN UNIV OF SCI & TECH
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