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A kind of preparation method of double oxide nano-agglomeration spray composite powder

A double oxide and composite powder technology, applied in the field of materials, can solve the problems affecting the friction and wear properties of the coating, low coating density, poor particle uniformity, etc., to improve high-temperature lubrication and anti-wear performance, improve cohesion Strength and friction coefficient reduction effect

Active Publication Date: 2022-07-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sintering and crushing method is mostly used, and the uniformity of the granulated material is poor, the spraying effect is poor, and the coating density is low, which in turn affects the friction and wear properties of the coating.

Method used

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  • A kind of preparation method of double oxide nano-agglomeration spray composite powder
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  • A kind of preparation method of double oxide nano-agglomeration spray composite powder

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Effect test

Embodiment 1

[0037] A preparation method of double oxide nano-agglomeration spraying composite powder, comprising the following steps:

[0038] Step 1: Ball milling molybdenum oxide raw powder with absolute ethanol, such as figure 2 As shown in the figure, the particle size of the original molybdenum oxide powder is less than 0.2μm. During ball milling, alumina or zirconia ceramic balls are used as the media balls for ball milling. 6:1, the ball milling time is 10 hours, the speed of the ball mill is 250 rpm, and finally the molybdenum oxide slurry after ball milling is obtained, such as Figure 5 As shown, the particle size of molybdenum oxide in the molybdenum oxide slurry after ball milling is less than 10 nm;

[0039] The original powder of bismuth oxide is ball-milled with anhydrous ethanol, such as figure 2 As shown in the figure, the particle size of the original bismuth oxide powder is less than 1.3 μm. During ball milling, alumina or zirconia ceramic balls are used as the medi...

Embodiment 2

[0048] A preparation method of double oxide nano-agglomeration spraying composite powder, comprising the following steps:

[0049] Step 1: Ball milling the molybdenum oxide original powder and absolute ethanol. The particle size of the molybdenum oxide original powder is less than 0.2 μm. During ball milling, alumina or zirconia ceramic balls are used as the medium balls during ball milling. The ball diameter of the medium ball is 1mm, 3mm, 5mm and 10mm, the ball-to-material ratio is 7:1, the ball milling time is 8 hours, the ball mill speed is 180 rpm, and finally the ball-milled molybdenum oxide slurry is obtained. Molybdenum particle size is less than 20nm;

[0050] The original bismuth oxide powder is ball-milled with anhydrous ethanol. The particle size of the original bismuth oxide powder is less than 1.3 μm. During ball milling, alumina or zirconia ceramic balls are used as the medium balls for ball milling. The ball diameters of the medium balls are 1 mm and 3 mm. , 5...

Embodiment 3

[0059] A preparation method of double oxide nano-agglomeration spraying composite powder, comprising the following steps:

[0060] Step 1: Ball milling the molybdenum oxide original powder and absolute ethanol. The particle size of the molybdenum oxide original powder is less than 0.2 μm. During ball milling, alumina or zirconia ceramic balls are used as the medium balls during ball milling. The ball diameter of the medium ball is 1mm, 3mm, 5mm and 10mm, the ball-to-material ratio is 8:1, the ball milling time is 6 hours, the ball mill speed is 100 rpm, and finally the ball-milled molybdenum oxide slurry is obtained. Molybdenum particle size is less than 25nm;

[0061] The original bismuth oxide powder is ball-milled with anhydrous ethanol. The particle size of the original bismuth oxide powder is less than 1.3 μm. During ball milling, alumina or zirconia ceramic balls are used as the medium balls for ball milling. The ball diameters of the medium balls are 1 mm and 3 mm. , 5...

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Abstract

The invention discloses a preparation method of double oxide nano-agglomeration spraying composite powder, which comprises: ball-milling molybdenum oxide original powder and bismuth oxide original powder with absolute ethanol, respectively, to obtain ball-milled molybdenum oxide slurry and ball-milled molybdenum oxide slurry. Bismuth oxide slurry; drying and sieving the ball-milled molybdenum oxide slurry and the ball-milled bismuth oxide slurry to obtain the ball-milled molybdenum oxide powder and the ball-milled bismuth oxide powder, and the ball-milled molybdenum oxide powder and the ball-milled bismuth oxide powder are obtained. The ball-milled bismuth oxide powder is mixed to obtain a mixed powder; the percentage by weight is as follows: 25% to 40% of the mixed powder, 55% to 70% of deionized water, 1% to 2% of a binder, and 1% to 2% of a dispersant. % and 1-2% of defoamer, heat and stir evenly to obtain mixed slurry; spray-dry the mixed slurry to obtain granulated powder; heat the granulated powder to obtain double oxide nano-agglomeration spraying Compound powder. The powder prepared by the invention has good sprayability, and the friction and wear performance in a wide temperature range is improved.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of double oxide nano-agglomeration spraying composite powder. Background technique [0002] Friction and wear account for about 70%-80% of component failures, among which friction and wear are more serious under high temperature conditions, such as high-temperature engines with high thrust ratios. Therefore, the study of self-lubricating coatings under high temperature conditions is of great significance for engineering applications. economic benefits. Metal oxides have received extensive attention due to their excellent chemical and structural stability, and their ability to form shear-friendly surfaces and provide good lubricating properties when plastically deformed at high temperatures. In recent years, there have been many studies on the tribological properties of some multi-component metal oxides or composite metal oxides, such as niobate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/02
CPCB01J2/02
Inventor 贾均红孙航田杰苟海龙杨鑫然蔡粮臣杨力嘉白甘雨
Owner SHAANXI UNIV OF SCI & TECH