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Silicon carbide foam ceramic/aluminum alloy composite material brake disc and preparation method thereof

A technology of foam ceramics and composite materials, which is applied in the direction of ceramic products, brake parts, mechanical equipment, etc., can solve the problems of short life, poor thermal conductivity, poor thermal fatigue resistance, etc., and achieve improved service life, good thermal conductivity, and improved Effect of Thermal Fatigue Resistance

Active Publication Date: 2017-05-10
SHIJIAZHUANG DONGDA HUITONG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of cast steel and cast iron brake discs used for road vehicles, such as large mass, poor thermal conductivity, poor thermal fatigue resistance, and short service life, the invention provides a brake disc with small mass, short production cycle, fast heat dissipation, and good thermal stability. Silicon carbide foam ceramic / aluminum alloy composite material brake disc for various high-speed and heavy-duty road vehicles with stable movement, low noise, long service life, small deformation and convenient disassembly, and its preparation method

Method used

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  • Silicon carbide foam ceramic/aluminum alloy composite material brake disc and preparation method thereof
  • Silicon carbide foam ceramic/aluminum alloy composite material brake disc and preparation method thereof
  • Silicon carbide foam ceramic/aluminum alloy composite material brake disc and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Silicon carbide foam ceramic skeleton reinforced ZL111 aluminum matrix composite brake disc

[0082] Step 1: Preparation of silicon carbide foam ceramic skeleton: using precursor dipping method to prepare silicon carbide slurry according to a certain proportion, using 8-15ppi polyurethane foam precursor as template, prepare silicon carbide ceramic green body and dry it . Put the silicon carbide ceramic green body into a sintering furnace at 1950~2280℃ for 0.5~3h, pressureless sintering to obtain a silicon carbide foam ceramic block with a length of 400 mm, a width of 400 mm, and a thickness of 5-15 mm. Cut it into the required shape (see attached figure 2 ) As a reinforcement of the friction layer. The porosity of the silicon carbide foam ceramic is 40~60%, the mesh diameter is 1.5~4 mm, the mass percentage of silicon carbide in the silicon carbide foam ceramic framework is 90~99%, and the rest is boron carbide and carbon. The volume density of the ceramic skeleton is 2...

Embodiment 2

[0091] Silicon carbide foam ceramic skeleton reinforced 7075 aluminum matrix composite brake disc

[0092] Step 1: Preparation of the silicon carbide foam ceramic skeleton: using a gel-injection molding method, the slurry prepared in a certain proportion is prepared into a ceramic green body and dried. Using a pressureless sintering method with a sintering temperature of 2000-2250 ℃ and a heat preservation time of 1 to 3 hours, a silicon carbide foam ceramic block with a length of 300 mm, a width of 300 mm and a thickness of 5-7 mm is obtained, which is cut into the required reinforcement by laser shape. The porosity of the silicon carbide foam ceramic is 65%, the mesh diameter is 3~6 mm, the mass percentage of silicon carbide in the silicon carbide foam ceramic is 96~99%, and the density of the ceramic skeleton is 2.6~2.8 g / cm 3 , Vickers hardness (Hv) 18 GPa, flexural strength 10 MPa, compressive strength 5 MPa, thermal conductivity 130 W / (m•K).

[0093] Step 2: Pretreatment of ...

Embodiment 3

[0101] Silicon carbide foam ceramic skeleton reinforced 5083 aluminum-based composite brake disc

[0102] Step 1: Preparation of the silicon carbide foam ceramic skeleton: using a three-dimensional printing method to prepare a certain proportion of the slurry into a ceramic green body for drying and trimming. Using the pressureless sintering method, the sintering temperature is 2200 ℃, and the holding time is 3 hours, a silicon carbide foam ceramic block with a length of 300 mm, a width of 300 mm and a thickness of 25 mm is obtained, which is cut into the required reinforcement shape by laser. The porosity of the silicon carbide foam ceramic is about 60~70%, the mesh diameter is 2~5 mm, the mass percentage of silicon carbide in the silicon carbide foam ceramic is 97%, and the density of the ceramic skeleton is 2.9g / cm 3 , Vickers hardness (Hv) 20GPa, flexural strength 8-10MPa, compressive strength 45-50 MPa, thermal conductivity 120-130 W / (m•K).

[0103] Step 2: Pretreatment of the...

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Abstract

A friction disc of metal / continuous-structure phase ceramic composite material and a method for manufacturing same are provided. The friction disc comprises a metal disc body (1) and a friction layer of metal / continuous-structure phase ceramic composite material arranged on one side or symmetrically arranged on both sides of the disc body. The metal disc body (1) is a metal backboard mechanically connected with the friction layer (3); or the metal disc body can be made of the same material as the composite material in the friction layer (3), and integrally cast with the friction layer; or the metal disc body can be made of the same material as the metal material in the friction layer (3) and integrally cast with the friction layer; or the metal disc body can be made of the same material as the metal material in the friction layer (3) and integrally cast with the friction layer, the disc body having reinforcing ribs. The friction disc of composite material can significantly reduce the weight of clutch plates and friction braking plates, and also has excellent friction and wear performance. It can not only carry out safe and effective friction clutch and brake operation for various kinds of rotating machinery, but also achieve the purpose of reducing cost, light weight and energy saving.

Description

Technical field [0001] The invention belongs to the technical field of brake disc manufacturing, and is particularly related to an Al / SiC for road vehicles foam (Ie silicon carbide foam ceramic / aluminum alloy) composite brake disc and its preparation method. Background technique [0002] With the energy shortage and the continuous improvement of vehicle speed, the development of lightweight technology for energy saving and weight reduction has attracted much attention. At present, most of the automotive brake disc (drum) materials still use cast iron or cast steel. The defects are high density, which is not conducive to reducing the weight of the vehicle; poor thermal conductivity, resulting in excessive temperature rise of the friction surface during braking; large temperature gradients are likely to form hot spots and thermal cracks; all of these affect driving safety, increase fuel consumption and increase fuel consumption. Unfavorable factors for shortening the life of brake ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/04F16D65/78F16D69/02B22D18/04C04B38/02C04B35/565C04B35/622
CPCB22D18/04C04B38/02F16D65/04F16D69/02
Inventor 房殊喻亮房明
Owner SHIJIAZHUANG DONGDA HUITONG NEW MATERIAL CO LTD
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