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A titanium-silicon-carbon reinforced alumina-based multiphase composite material and its preparation method

A composite material and alumina technology, which is applied in the field of preparation of carbide-doped ceramic-based metal composite materials, can solve the problems of low hardness and relative density, and achieve high relative density, high strength, excellent mechanical properties and chemical stability Effect

Active Publication Date: 2020-10-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Ti 3 SiC 2 Multiphase composites reinforced with alumina have problems of low hardness and relative density

Method used

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  • A titanium-silicon-carbon reinforced alumina-based multiphase composite material and its preparation method
  • A titanium-silicon-carbon reinforced alumina-based multiphase composite material and its preparation method
  • A titanium-silicon-carbon reinforced alumina-based multiphase composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a titanium-silicon-carbon reinforced alumina-based multiphase composite material, the steps of which are:

[0032] 1) Mix titanium powder, alumina powder, and silicon carbide powder in a volume ratio of 40:40:20, use alcohol as the dispersion medium, the dispersion volume ratio of powder and alcohol is 1:6, and alumina balls are used as the ball milling medium. Ball mill in a tetrafluoroethylene tank for 4 hours; place the milled slurry in a drying oven and dry at 70°C for 24 hours; after fully drying into a powder, pass through a 50-mesh sieve to obtain a mixed powder;

[0033] 2) Take 30g of the mixed powder in a vacuum hot-press furnace, put it in a graphite mold with a diameter of 45mm, and sinter at 1500°C and 30MPa for 2h, with a heating rate of 10°C / min, to obtain a titanium-silicon-carbon reinforced alumina matrix Composite materials.

[0034] It has been determined that the titanium-silicon-carbon reinforced alumina-based multiphase comp...

Embodiment 2

[0036] A method for preparing a titanium-silicon-carbon reinforced alumina-based multiphase composite material, the steps of which are:

[0037] 1) Mix titanium powder (1μm), alumina powder (1μm) and silicon carbide powder (800nm) at a volume ratio of 40:45:15, use alcohol as the dispersion medium, and the dispersion volume ratio is 1:6, and the alumina ball is The ball milling medium is ball milled in a polytetrafluoroethylene tank for 4 hours; the milled slurry is placed in a drying oven and dried at 70°C for 24 hours; after being fully dried into a powder, pass through a 50-mesh sieve to obtain a mixed powder;

[0038] 2) Take 30g of the mixed powder in a vacuum hot-press furnace, put it in a graphite mold with a diameter of 45mm, and sinter at 1500°C and 30MPa for 2h, with a heating rate of 10°C / min, to obtain a titanium-silicon-carbon reinforced alumina matrix Composite materials.

[0039]It has been determined that the titanium-silicon-carbon reinforced alumina-based mu...

Embodiment 3

[0041] A method for preparing a titanium-silicon-carbon reinforced alumina-based multiphase composite material, the steps of which are:

[0042] 1) Mix titanium powder (1μm), alumina powder (1μm) and silicon carbide powder (800nm) at a volume ratio of 40:50:10, use alcohol as the dispersion medium, and the dispersion volume ratio is 1:6, and the alumina ball is The ball milling medium is ball milled in a polytetrafluoroethylene tank for 4 hours; the milled slurry is placed in a drying oven and dried at 70°C for 24 hours; after being fully dried into a powder, pass through a 50-mesh sieve to obtain a mixed powder;

[0043] 2) Take 30g of the mixed powder in a vacuum hot-press furnace, put it in a graphite mold with a diameter of 45mm, and sinter at 1500°C and 30MPa for 2h, with a heating rate of 10°C / min, to obtain a titanium-silicon-carbon reinforced alumina matrix Composite materials.

[0044] It has been determined that the titanium-silicon-carbon reinforced alumina-based m...

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Abstract

The invention relates to a titanium-silicon-carbon reinforced alumina based multiphase composite material and a preparation method thereof. The preparation method comprises the steps: weighing a titanium powder, an alumina powder and a silicon carbide powder according to a certain volume ratio, taking ethyl alcohol as a dispersion medium and alumina balls as a ball milling medium, fully mixing, and drying to obtain a mixed powder; and placing the mixed powder into a vacuum hot pressing furnace, and carrying out hot pressing sintering with a certain pressure, heating rate, sintering temperature and heat preservation time. In view of hot pressing conditions, Al2O3 and Ti in the alumina based multiphase composite material undergo a strong interfacial reaction at high temperature, and titanium aluminum intermetallic compounds, especially TiAl and Ti3Al, are generated and can reduce the performance of the material. SiC particles are mixed and added to undergo a reaction with Ti, and new compounds TiC, Ti3SiC2 and other reinforcement toughening substances are generated; at the same time, a part of pores of the material are filled with semi-molten Si, so that the alumina based multiphase composite material having high relative density and high hardness, toughness and strength is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of carbide-doped ceramic-based metal composite materials, and relates to a titanium-silicon-carbon reinforced alumina-based multiphase composite material and a preparation method thereof. Background technique [0002] In recent years, research on metal-ceramic composites has attracted much attention, among which Al 2 o 3 Ceramics are one of the most widely used ceramic materials. Alumina-based ceramic composite materials have the characteristics of wear resistance, corrosion resistance, high temperature resistance, high hardness, etc., and have excellent oxidation resistance and chemical stability, low price, and abundant resources. At present, it has been widely used in aerospace, medical treatment, automobile engines, electronic components, mechanical materials and other fields. However, the toughness of alumina ceramics is low, which limits its production and application. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/65C04B35/10
CPCC04B35/10C04B35/65C04B35/806C04B2235/3826C04B2235/404C04B2235/77C04B2235/96
Inventor 吴俊彦王志周欣徐菡卿齐方方
Owner UNIV OF JINAN
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