Preparing method of interface modification layer of ceramic particle enhanced metal base composite material

A technology of ceramic particles and composite materials, which is applied in the field of metal matrix composite materials, can solve the problems of poor bonding strength between metal matrix and ceramic particles, poor performance of composite materials, etc., and achieve no microscopic defects, tight interface bonding, and good bonding uniformity Effect

Active Publication Date: 2014-12-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the key problems of poor bonding strength between metal matrix and ceramic particles and poor performance of composite materials during the preparation of metal matrix comp...

Method used

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  • Preparing method of interface modification layer of ceramic particle enhanced metal base composite material
  • Preparing method of interface modification layer of ceramic particle enhanced metal base composite material
  • Preparing method of interface modification layer of ceramic particle enhanced metal base composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The method described in this example is used to prepare Al 2 o 3 The particle-reinforced iron-based composite material specifically comprises the following steps:

[0031] (1) Weigh Al with a particle size of 10-50 mesh 2 o 3 Granule 375g, particle size are 500 meshes of pure Ni powder 125g, with 3%Na 2 SiO 3 and 2%H 2 25g of the prepared adhesive is mixed and fully mixed in a ball mill for 30 minutes;

[0032] (2) Take out the mixed particles in step (1), and press them into a circular preform with a diameter of 90mm under a pressure of 20MPa (such as figure 1 );

[0033] (3) Roast the prefabricated body at 800°C for 2 hours, quickly place it in the mold cavity after being released from the furnace, and cast molten iron at a pouring temperature of 1380~1430°C, and cast at a pressure of 70MPa so that the molten iron is infiltrated into Al 2 o 3 in the spaces between the particles (such as figure 2 ), to obtain a dense composite interfacial modification layer ...

Embodiment 2

[0036] The method described in this example is used to prepare Al 2 o 3 Particle-reinforced 45 steel-based composite materials, specifically comprising the following steps:

[0037](1) Weigh Al with a particle size of 80-120 mesh 2 o 3 425g of particles, 75g of Ti powder with a particle size of 100 mesh, and 4%Na 2 SiO 3 and 2%H 2 O prepared adhesive 30g mixed, fully mixed in a ball mill for 1 hour;

[0038] (2) Take out the mixed particles in step (1), and press them into a circular preform with a diameter of 90mm under a pressure of 10MPa;

[0039] (3) Roast the prefabricated body at 1000°C for 2 hours, quickly place it in the mold cavity after being released from the furnace, and cast 45% molten steel at a pouring temperature of 1500~1550°C, and cast at a pressure of 40MPa so that the molten steel is infiltrated into Al 2 o 3 In the gaps between the particles, a dense composite interfacial modification layer is obtained.

[0040] The 5%Ti-Al prepared in this exampl...

Embodiment 3

[0042] The method described in this example is used to prepare SiC particle-reinforced aluminum-based composite materials, which specifically includes the following steps:

[0043] (1) Weigh 450g of SiC particles with a particle size of 150~180 mesh, 50g of pure Cu powder with a particle size of 500 mesh, and mix with 5% silica sol and 3%H 2 40g of the prepared adhesive was mixed and fully mixed in a ball mill for 1.5 hours;

[0044] (2) Take out the mixed particles in step (1), and press them into a circular preform with a diameter of 90mm under a pressure of 20MPa;

[0045] (3) Roast the prefabricated body at 500°C for 2 hours, quickly place it in the mold cavity after being out of the furnace, pour aluminum liquid at a pouring temperature of 660~680°C, and cast at a pressure of 40MPa, so that the aluminum liquid is infiltrated into the SiC particles In the gap between them, a dense composite interfacial modification layer is obtained.

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Abstract

The invention discloses a preparing method of an interface modification layer of a ceramic particle enhanced metal base composite material, and belongs to the technical field of a metal base composite material. The method comprises the following steps that ceramic particles and modification element particles are uniformly mixed according to a certain proportion, are pressed into a prefabricated body and are sintered, then, the sintered prefabricated body is placed into a casting die cavity, a metal substrate with the melting point lower than the melting point of the modification elements is cast on the sintered prefabricated body, next, the metal base composite material is prepared by adopting a pressure casting method, the melting point of the modification elements is a little higher than the melting point of molten liquid, so the modification elements are in a molten state when the molten liquid is cast into the die cavity, then, the modification elements move together with the molten liquid under the pressure effect, when meeting the blocking effect of the ceramic particles, the modification elements and the molten metal can go around the surface of the ceramic particles for forming a micrometer level interface modification layer on the surfaces of the ceramic particles, and the bonding intensity of the ceramic particles and the metal interfaces can be improved. When the method provided by the invention is adopted, great significance can be realized on the preparation of high-performance and low-cost metal base composite material.

Description

technical field [0001] The invention relates to a method for preparing an interface modification layer of a metal-matrix composite material reinforced by ceramic particles, and belongs to the technical field of metal-matrix composite materials. Background technique [0002] Due to the excellent wear resistance, high temperature performance and low cost of metal matrix composites, they have gradually been applied in the fields of high temperature structural materials, wear-resistant materials, tooling materials and other fields. However, the bonding strength between ceramic particles and the metal matrix is ​​often poor, resulting in unsatisfactory macroscopic mechanical properties of composite materials. At present, there are basically three types of methods to improve the combination of the reinforcement phase and the matrix interface in composite materials: ① Coating on the surface of the reinforcement phase. ② Add alloying elements that can react with the reinforcement p...

Claims

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Application Information

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IPC IPC(8): B22D23/04B22D17/00C22C1/10
Inventor 卢德宏余晶
Owner KUNMING UNIV OF SCI & TECH
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