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Method of preparing aluminium-base composite material with aluminium and domestic garbage cinder

A technology of aluminum-based composite materials and domestic waste, which is applied in the field of aluminum-based composite materials prepared from aluminum and domestic waste ash, can solve the problems of easy oxidation and creep, high brittleness of ceramic particles, strong heat resistance, and strong corrosion resistance. Effect of improving strength and elastic modulus, good toughness and high temperature performance

Inactive Publication Date: 2004-09-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, metals and their alloys have good thermal diffusion properties and good ductility, but they are easy to oxidize and creep at high temperatures; ceramic particles are brittle, but have strong heat resistance and corrosion resistance.

Method used

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  • Method of preparing aluminium-base composite material with aluminium and domestic garbage cinder
  • Method of preparing aluminium-base composite material with aluminium and domestic garbage cinder
  • Method of preparing aluminium-base composite material with aluminium and domestic garbage cinder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Implementation conditions

[0022] The mass ratio of the aluminum metal powder material to the domestic waste ash with a particle size below 74 μm is 83:17. After mixing evenly, press it into a compact with a diameter of 10×15 mm in a press under a pressure of 6.8 MPa. Liquid-phase sintering in a sintering kiln fed with a nitrogen protective gas atmosphere, according to figure 2 The liquid phase sintering system is carried out in the liquid phase sintering system. The sintering system is as follows: firstly, the temperature is raised to 180 ° C at a heating rate of 20 ° C / h, and the temperature is maintained for 10 h; With a heating rate of 52.5°C / h, the temperature was raised to a final temperature of 880°C, kept for 5 hours, and the finished product was obtained by liquid phase sintering.

[0023] 2) Implementation results

[0024] The finished product has good mechanical properties. The coefficient of thermal expansion is 0.3 and the density is 2.43g / cm 3 ,...

Embodiment 2

[0026] 1) Implementation conditions

[0027] The mass ratio of the aluminum metal powder material to the domestic waste ash with a particle size below 74 μm is 91:9. After mixing evenly, press it into a compact with a diameter of 10×15 mm in a press under a pressure of 5.8 MPa. Liquid-phase sintering in a sintering kiln fed with a nitrogen protective gas atmosphere, according to image 3 The liquid phase sintering system is carried out in the liquid phase sintering system. The sintering system is as follows: firstly, the temperature is raised to 200 ° C at a heating rate of 22.5 ° C / h, and the temperature is maintained for 10 hours; then the temperature is increased to 480 ° C at a heating rate of 20 ° C / h, and the temperature is maintained for 6 hours; With a heating rate of 37.1°C / h, the temperature was raised to a final temperature of 740°C, held for 3 hours, and the finished product was obtained by liquid phase sintering.

[0028] 2) Implementation results

[0029] T...

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Abstract

The present invention relates to method of preparing metal-base composite material. Aluminum metal powder and domestic garbage cinder with silica, alunina and silicon carbide as main components are mixed, pressed and liquid phase sintered to obtain aluminum-base composite material product. Under certain pressure and temperature conditions, one or several thermally stable reinforcing phases is created inside aluminum metal base via in-situ reaction, and the reinforcing phases is grains with high hardness and high high-temperature strength and dispersed via sintering to make the aluminum-base composite material possess high tensile elastic modulus, high hardness and high wear resistance. The present invention has low production cost and can reduce environmental pollution.

Description

[0001] 1. Technical Field: Composite Materials 2. Background technology: [0002] The rapid development of modern science and technology has put forward higher and higher requirements for materials. The performance of metal matrix composites is superior to both metal materials and resin-based composites. Among them, particle-reinforced metal matrix composites are developed as heat-resistant, wear-resistant, and corrosion-resistant materials. It has good mechanical properties and friction properties. Generally speaking, metals and their alloys have good thermal diffusion properties and good ductility, but they are easy to oxidize and creep at high temperatures; ceramic particles are brittle, but have strong heat resistance and corrosion resistance. Combining the two materials together under certain process conditions, the composite material formed has the advantages of high strength, high hardness, high wear resistance, high corrosion resistance, high temperature resistance and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C21/00C22C32/00
Inventor 王华胡建杭何方包桂蓉王胜林
Owner KUNMING UNIV OF SCI & TECH
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