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Axial layered ceramic diamond composite nozzle and preparation method thereof

A composite material and diamond technology, which is applied in the field of composite material nozzles and its preparation, can solve the problems of high cost, long preparation cycle, poor wear resistance, etc., and achieve the effects of improving hardness, shortening production cycle, and low preparation cost

Active Publication Date: 2019-09-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an axial layered ceramic diamond composite nozzle and its preparation method, which overcomes the defects of long preparation period, high cost and poor wear resistance

Method used

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  • Axial layered ceramic diamond composite nozzle and preparation method thereof
  • Axial layered ceramic diamond composite nozzle and preparation method thereof
  • Axial layered ceramic diamond composite nozzle and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Raw material: Si 3 N 4 : Purity>95%, particle size2 o 3 : Purity>99.9%, particle size2 o 3 : Purity>99.9%, particle size2 o 3 with Y 2 o 3 The mass fraction ratio is 4%: 5%; the diamond powder is galvanized Ni, and its particle size is 10-30 μm.

[0032] S1. Silicon nitride slurry preparation: according to Si 3 N 4 with Al 2 o 3 -Y 2 o 3 Mass fraction ratio = 90%: 10% ingredients, with ethanol as solvent, with Si 3 N 4 It is a ball milling medium with a ball-to-material ratio of 3:1, mixed on a planetary ball mill for 8 hours to obtain a silicon nitride slurry.

[0033] S2. Preparation of mixed slurry: Divide the silicon nitride slurry obtained in step S1 into three groups, and add diamond micropowder with mass fractions of 10%, 20%, and 30% in turn to obtain three groups of mixed slurry with increasing diamond content. A group of mixed slurry is stirred evenly by the stirrer, the speed of the stirrer is 200r / min, and the mixed slurry is stirred for 15min....

Embodiment 2

[0038] Raw material: Si3 N 4 : Purity>95%, particle size2 o 3 : Purity>99.9%, particle size2 o 3 : Purity>99.9%, particle size2 o 3 with Y 2 o 3 The mass fraction ratio is 3%: 2%; the diamond micropowder is galvanized Cu, and its particle size is 10-30μm.

[0039] S1. Silicon nitride slurry preparation: according to Si 3 N 4 with Al 2 o 3 -Yb 2 o 3 Mass fraction ratio = 95%: 5% ingredients, ethanol as solvent, Si 3 N 4 It is a ball milling medium with a ball-to-material ratio of 2:1, and it is mixed on a planetary ball mill for 12 hours to obtain a silicon nitride slurry.

[0040] S2. Preparation of mixed slurry: Divide the silicon nitride slurry obtained in step S1 into four groups, and add diamond micropowder with a mass fraction of 10%, 20%, 30%, and 40% in sequence to obtain four groups of mixed slurry with increasing diamond content Each group of mixed slurry was stirred evenly by a stirrer, the speed of the stirrer was 300r / min, and the mixed slurry was stir...

Embodiment 3

[0045] Raw material: Si 3 N 4 : Purity>95%, particle size2 o 3 : Purity>99.9%, particle size2 o 3 : Purity>99.9%, particle size2 o 3 with Sc 2 o 3 The mass fraction ratio is 3%: 2%; the diamond powder is galvanized Ni, and its particle size is 10-30 μm.

[0046] S1. Silicon nitride slurry preparation: according to Si 3 N 4 with Al 2 o 3 -Sc 2 o 3 Mass fraction ratio = 92%: 8% ingredients, ethanol as solvent, Si 3 N 4 It is a ball milling medium with a ball-to-material ratio of 5:1, and it is mixed on a planetary ball mill for 10 hours to obtain a silicon nitride slurry.

[0047] S2. Preparation of mixed slurry: Divide the silicon nitride slurry obtained in step S1 into five groups, and add diamond micropowder with a mass fraction of 10%, 20%, 30%, 40%, and 50% in sequence to obtain five groups with increasing diamond content The mixed slurry was stirred by the agitator at a speed of 400r / min for 30min.

[0048] S3. Drying and granulation: drying the five groups ...

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Abstract

The invention discloses an axial laminated ceramic and diamond composite spray nozzle and a preparation method thereof. The spray nozzle is prepared from a composite with silicon nitride serving as a base body, an oxide serving as a sintering aid and diamond serving as a strengthening phase through hot pressed sintering. The content of diamond is gradually increased layer by layer in the axial direction of the spray nozzle from the middle to two sides, and the spray nozzle is at least in 3 layers. Raw materials are made into paste, dried and pelleted, powder is obtained, the spray nozzle is formed through hot pressed sintering, the preparation cost is low, the requirement of the spray nozzle for high wear resistance can be met, the production cycle can be shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of industrial nozzle processing, in particular to a composite material nozzle and a preparation method thereof. Background technique [0002] Nozzles are one of the key components of surface cleaning, strengthening and jet cutting equipment. They are easy to wear and are widely used in industrial fields. Nozzles made of metal, hard alloy and other materials have low hardness and poor wear resistance, resulting in short service life of the nozzle and seriously affecting production efficiency. Ceramic material is one of the ideal materials for nozzles due to its advantages of high hardness and wear resistance. The performance of the material can be further improved by introducing a reinforcing phase into the ceramic material. [0003] The Chinese patent "CN 1297513C" reported a method for preparing a gradient function nozzle by adding (W, Ti)C solid solution as a reinforcing phase to the SiC matrix, but the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/584C04B35/78C04B35/645C04B35/626
Inventor 王成勇王宏建林华泰郑李娟胡小月伍尚华王启民郭伟明
Owner GUANGDONG UNIV OF TECH
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