3D networked vacuum-air pressure method for casting friction composite material of ceramics-metals

A three-dimensional network, composite material technology, applied in the field of friction composite material preparation, can solve the problems of poor interface wettability, difficulty in metal penetration, and chemical reaction between ceramics and metals.

Inactive Publication Date: 2006-02-01
NORTHEASTERN UNIV
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Problems solved by technology

[0007] The present invention aims at the problems such as easy chemical reaction between ceramics and metals, poor interface wettability, and difficulty in metal infiltration in the preparation process of the current three-dimensional network ceramic-metal friction composite material, and provides a method for preparing three-dimensional network ceramic-metal friction materials using vacuum-air pressure casting technology. A New Approach to Composites

Method used

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  • 3D networked vacuum-air pressure method for casting friction composite material of ceramics-metals

Examples

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Effect test

Embodiment 1

[0028] Example 1 Preparation of three-dimensional network SiC ceramics-40Cr steel composite material

[0029] 1. Oxidize the three-dimensional network SiC skeleton at 1300°C for 3 hours under oxidation conditions. The oxidation condition is to feed flowing air or flowing oxygen into the furnace. The purpose of oxidation treatment is to form SiO on the surface of the SiC skeleton. 2 layer to delay the corrosion of the SiC skeleton by molten steel.

[0030] 2. Configure BN acetone paint with a mass ratio of BN and acetone of 1:2, and coat a layer of BN acetone paint in the metal mold. The purpose of coating the mold surface is to prevent the liquid metal from reacting with the metal mold.

[0031] 3. Put the surface-treated three-dimensional network ceramic skeleton into the metal mold, then put steel (40Cr) into the crucible on the upper layer of the vacuum-air pressure casting furnace, and put the metal mold with the three-dimensional network ceramic skeleton on the lower laye...

Embodiment 2 3

[0032] Embodiment 2 Preparation of three-dimensional network SiC ceramics-copper alloy (663) composite material

[0033] 1. Oxidize the three-dimensional network SiC skeleton at 1300°C for 3 hours under oxidation conditions. The oxidation condition is to feed flowing air or flowing oxygen into the furnace. The purpose of oxidation treatment is to form SiO on the surface of the SiC skeleton. 2 layer to delay the corrosion of the SiC skeleton by the copper alloy melt.

[0034] 2. Configure BN acetone paint as 1:2 by BN and acetone mass ratio, coat one deck of BN acetone paint in the metal mold, and the purpose of coating the mold surface is in order to prevent the reaction of liquid copper alloy and metal mould.

[0035] 3. Put the surface-treated three-dimensional network ceramic skeleton into the metal mold, then put the copper alloy (663) into the crucible on the upper layer of the vacuum-air pressure casting furnace, and put the metal mold with the three-dimensional network ...

Embodiment 3 3

[0036] Embodiment 3 Preparation of three-dimensional network SiC ceramics-titanium alloy (TC4) composite material

[0037] 1. First, modify the three-dimensional network SiC ceramics with inorganic substances: ① Weigh 200 mesh industrial alumina and silica according to the mass percentage of alumina and silica at 60:40, and use a ball mill to grind the mixed powder of alumina and silica to The particle size is 10 μm, alumina balls are used as grinding balls in the ball milling process, the mass ratio of material and balls is 1:2, the ball milling medium is water, and the mass ratio of material and water is 1:1.5, and the total amount of materials Amount of 0.2% tetramethylammonium hydroxide aqueous solution (concentration is 20%) is used as dispersant, adds 4% polyvinyl alcohol aqueous solution (concentration is 10%) of material total amount as suspending agent, adds the phosphoric acid of material total amount 3% Aluminum dihydrogen is used as a binder, and the slurry is pour...

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Abstract

A vacuum-pneumatic casting method for the 3D network shaped ceramic-metal friction material includes such steps as pretreating the 3D network shaped ceramic skeleton made of SiC, B4C, Si3N4, Al2O3, ZrO2, or mullite ceramic by surficial preoxidizing, inorganic modifying, electroplating, or powder metallurgical, providing metal chosen from Al, Al alloy, Cu alloy, Ti alloy and iron or steel, pretreating mould, and smelting-casting in vacuum-pneumatic furnace.

Description

technical field [0001] The invention relates to a preparation method of a friction composite material, in particular to a preparation method of a three-dimensional network ceramic-metal friction composite material. Background technique [0002] Since the ceramic-metal friction composite material has the properties of high hardness, high melting point, and good wear resistance of ceramics on the one hand, and the high toughness and high strength of metals on the other hand, it has a wide range of friction, corrosion resistance, and high temperature. the use of. Classified according to the shape of ceramic reinforcement phase in ceramic-metal friction composite materials, ceramic-metal friction composite materials can be divided into ceramic dispersed particle reinforcement, ceramic fiber reinforcement and three-dimensional network ceramic reinforcement, etc. At present, there are many reports on ceramic-metal friction composite materials with the first two reinforcement phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/02C04B41/88
Inventor 茹红强房明王瑞琴巩甘雷左良张宁
Owner NORTHEASTERN UNIV
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