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A method for controlling the surface morphology of laser-processed silicon nitride-based composite materials

A technology of laser processing and composite materials, applied in the field of ceramic materials, can solve the problems of inability to meet the requirements of processing accuracy, difficulty in building models, and cumbersome processes

Active Publication Date: 2021-08-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the literature (Journal of Manufacturing Processes 19 (2015) 49-58) predicts the surface roughness of laser processing materials by means of multi-energy field modeling, modeling comprehensive experiments and calculation methods, and obtains the laser parameters and surface accuracy of alumina ceramics It is difficult to establish a model, and it also needs to demonstrate calculation results and specific experimental verification, and the process is cumbersome
The literature (Ceramics International 42 (2016) 4377-4385) has used a large number of experiments to study the roughness of the material surface under different process parameters, but as long as the material composition changes, it needs to be re-tested, which cannot meet the processing of materials with different properties in different occasions. Accuracy requirements

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  • A method for controlling the surface morphology of laser-processed silicon nitride-based composite materials
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  • A method for controlling the surface morphology of laser-processed silicon nitride-based composite materials

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Embodiment 1

[0045] The embodiment of the present invention discloses the first silicon nitride-based composite material. The specific method of laser regulating and processing the surface morphology is as follows:

[0046] Step 1: Si 3 N 4 As raw material, with Al 2 o 3 , Y 2 o 3 As a sintering aid, according to the mass fraction ratio Si 3 N 4 :Al 2 o 3 : Y 2 o 3 =90%: 4%: 6% ingredients, using TiN as the conductive second phase material, mixing with absolute ethanol as the solvent, the mixing method is to mix the slurry mechanically at a speed of 200r / min for 9 hours, and obtain a uniformly mixed laser processing slurry Then, the laser processing slurry is dried, granulated and sieved to obtain laser processing powder, and the laser processing powder is placed in a graphite mold for spark plasma sintering to obtain laser processing sample A; wherein, Si 3 N 4 The particle size of TiN is 100nm, the particle size of TiN is 500nm, and the particle size of Si 3 N 4 : The mass ...

Embodiment 2

[0053] The embodiment of the present invention discloses the second silicon nitride-based composite material. The specific method of laser regulating and processing the surface morphology is as follows:

[0054] Step 1: Si 3 N 4 As raw material, with Al 2 o 3 , Y 2 o 3 As a sintering aid, according to the mass fraction ratio Si 3 N 4 :Al 2 o 3 : Y 2 o 3 =90%: 4%: 6% ingredients, TiN is used as the conductive second phase material, and absolute ethanol is used as the solvent for mixing. The mixing method is to mix the slurry mechanically at a speed of 300r / min for 8 hours to obtain a uniformly mixed laser processing slurry Then, the laser processing slurry is dried, granulated and sieved to obtain laser processing powder, and the laser processing powder is placed in a graphite mold for spark plasma sintering to obtain laser processing sample A; wherein, Si 3 N 4 The particle size of TiN is 300nm, the particle size of TiN is 100nm, and the particle size of Si 3 N 4...

Embodiment 3

[0061] The embodiment of the present invention discloses the third silicon nitride-based composite material. The specific method of laser regulating and processing the surface morphology is as follows:

[0062] Step 1: Si 3 N 4 As raw material, with Al 2 o 3 , Y 2 o 3 As a sintering aid, according to the mass fraction ratio Si 3 N 4 :Al 2 o 3 : Y 2 o 3 =90%: 4%: 6% ingredients, TiN is used as the conductive second phase material, and absolute ethanol is used as the solvent for mixing. The mixing method is to mix the slurry mechanically at a speed of 350r / min for 11 hours to obtain a uniformly mixed laser processing slurry Then, the laser processing slurry is dried, granulated and sieved to obtain laser processing powder, and the laser processing powder is placed in a graphite mold for spark plasma sintering to obtain laser processing sample A; wherein, Si 3 N 4 The particle size of TiN is 200μm, the particle size of TiN is 150nm, and the particle size of Si 3 N 4...

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Abstract

The invention belongs to the technical field of ceramic materials, and in particular relates to a method for adjusting and controlling the surface morphology of a silicon nitride-based composite material processed by laser. The invention provides a method for adjusting and controlling the surface morphology of silicon nitride-based composite materials by laser processing, comprising the following steps: step 1, using Si 3 N 4 as the matrix raw material, with the conductive second phase material as the additive, and mixed with the sintering agent and the solvent, followed by drying, granulation and sintering to obtain the laser processing sample A; step 2, the laser processing sample A is sequentially polished, Polishing, washing and drying to obtain a laser processed sample B; step 3, performing laser processing on the laser processed sample B, followed by washing and drying to obtain a silicon nitride-based composite material. This application by changing Si 3 N 4 The thermal and electrical conductivity and microstructure of ceramics can be used to control the surface accuracy of laser processing materials.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a method for adjusting and controlling the surface morphology of a silicon nitride-based composite material processed by laser. Background technique [0002] With the rapid development of modern industry, the demand for miniaturized functional parts is increasing, and the precision requirements for material processing are constantly increasing. Ceramics are widely used in aerospace, vehicle engineering, biomedicine and other fields due to their superior mechanical properties. Silicon nitride (Si 3 N 4 ) Ceramics have the characteristics of high comprehensive mechanical properties, high temperature resistance, wear resistance, and corrosion resistance. As important structural ceramic materials, they are widely used in aerospace, equipment manufacturing, energy chemical industry, biomedical and other fields. For hard, brittle and difficult-to-machine materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/00
CPCC04B41/0036C04B41/009C04B35/584
Inventor 袁莉娟左飞吕健王宏建林华泰
Owner GUANGDONG UNIV OF TECH