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Preparation method of lightweight silicon carbide ceramic friction-increasing material

A technology of silicon carbide ceramics and friction-increasing materials, which is applied in the field of friction material preparation, can solve problems such as high thermal conductivity, high density, and large noise, and achieve the effects of good wear resistance, low production cost, and noise reduction

Inactive Publication Date: 2016-03-30
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Silicon carbide ceramic materials have the characteristics of high mechanical strength, small specific gravity, high thermal conductivity, and good wear resistance, and are the most commonly used friction-increasing materials; in the prior art, brakes made of silicon carbide materials as friction-increasing materials Components, high density, and will generate a lot of noise when working

Method used

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  • Preparation method of lightweight silicon carbide ceramic friction-increasing material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select silicon carbide powder ceramic powder with a median diameter of 4.2 μm, use water accounting for 60% of the mass of silicon carbide powder as the dispersion medium, use alumina as the sintering aid, use sodium tripolyphosphate as the dispersant, and use water as the Propyl n-octanoate with twice the volume is the organic dispersed phase, cetyltrimethylammonium chloride, which is 1 / 15 of the mass of propyl n-octanoate, is used as an emulsifier, methylolacrylamide is used as a monomer, and acryl Methyl acrylate as crosslinking agent, N, N, N / , N / -Tetramethylethylenediamine is used as a catalyst and poured into a ball mill tank for ball milling. The speed of the ball mill is 38r / min, and it runs for 10h; the amount of sintering aid, dispersant, monomer, crosslinking agent, and catalyst is respectively silicon carbide 0.6%, 0.7%, 8%, 0.8%, 0.3% of the powder mass; put the ball-milled slurry in a mixing tank and stir, and add potassium persulfate as the initiator...

Embodiment 2

[0031] Select silicon carbide powder ceramic powder with a median diameter of 3.0 μm, use water accounting for 100% of the mass of silicon carbide powder as the dispersion medium, use alumina as the sintering aid, use ammonium tripolyphosphate as the dispersant, and use water as the 1 times the volume of methyl benzoate as the dispersed phase of organic matter, Tween 80, which is 1 / 30 of the mass of methyl benzoate, as the emulsifier, acrylic acid as the monomer, and dipropylene tartrate diamide as the crosslinking agent, N, N, N / , N / -Tetramethylethylenediamine is used as a catalyst and poured into a ball mill tank for ball milling. The ball mill rotates at 60 r / min and runs for 10 hours. The amounts of sintering aids, dispersants, monomers, crosslinking agents, and catalysts are respectively 1.2%, 1.5%, 2%, 0.2%, and 0.3% of the mass of the silicon carbide powder. The ball-milled slurry is placed in a mixing tank and stirred, and ammonium persulfate is added as an initi...

Embodiment 3

[0033] Select silicon carbide powder ceramic powder with a median diameter of 2.5 μm, use water accounting for 140% of the mass of silicon carbide powder as the dispersion medium, use alumina as the sintering aid, use ammonium hexametaphosphate as the dispersant, and use water as the 0.5 times the volume of cyclohexane as the dispersed phase of organic matter, with sodium dodecylbenzenesulfonate 1 / 50 of the mass of cyclohexane as the emulsifier, and acrylamide as the monomer, N, N / - Methylenebisacrylamide as crosslinking agent, N, N, N / , N / -Tetramethylethylenediamine is used as a catalyst and poured into a ball mill tank for ball milling. The speed of the ball mill is 30r / min, and it runs for 2h; the amount of sintering aid, dispersant, monomer, crosslinking agent, and catalyst is respectively silicon carbide 0.8%, 0.8%, 3%, 0.3%, 0.5% of the powder mass. Put the ball-milled slurry in a mixing tank and stir, while stirring, add ammonium persulfate as an initiator, and ...

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Abstract

The invention belongs to the technical field of preparation of friction materials, and relates to a preparation method of a lightweight silicon carbide ceramic friction-increasing material. The preparation method of the lightweight silicon carbide ceramic friction-increasing material adopts a method combining an emulsion template method and gel injection molding to prepare a lightweight silicon carbide ceramic material which is small in air hole diameter, uniform in air hole distribution and high in mechanical strength. The preparation method specifically comprises the following steps: preparing ceramic slurry, adding an organic substance disperse phase and an emulsifying agent into the ceramic slurry, stirring uniformly, and emulsifying uniformly to obtain suspended slurry; adding an initiating agent into the suspended slurry, and carrying out rapid curing molding on the slurry; drying to obtain a lightweight silicon carbide block; and carrying out mechanical crushing, grinding and screening on the lightweight silicon carbide block to obtain a lightweight silicon carbide friction-increasing material of which the size is 0.5-10mm. The preparation method provided by the invention realizes lightweight of a friction-increasing material, reduces the noise produced in use, improves the comfort, and has the characteristics of simple preparation process and relatively low production cost.

Description

technical field [0001] The invention belongs to the technical field of friction material preparation, and in particular relates to a preparation method of a lightweight silicon carbide ceramic friction-increasing material. Background technique [0002] The braking system is a key component of vehicles such as automobiles, trains, and airplanes, and the comprehensive performance of the brake pads restricts the stability and reliability of the braking system; with the increasing requirements for high speed and comfort, the friction The requirements for materials and their structures are becoming more and more stringent; therefore, it is imperative to develop new friction materials as soon as possible; the brake pads of modern braking systems mainly use semi-metallic friction materials and non-asbestos friction materials. Many problems, such as high noise, vibration, high wear rate, short service life. There are also C-C composite friction materials and ceramic friction mate...

Claims

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Application Information

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IPC IPC(8): C04B35/565
Inventor 董宾宾王刚袁波韩建燊陈阔
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES