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Titanium/aluminum oxide interface reaction control and optimization method

An interfacial reaction, alumina technology, applied in the field of metal-ceramic composite materials, can solve the problems of reducing the mechanical properties of titanium/alumina composite materials, and achieve the effects of reducing the thickness of the reaction layer, inhibiting the degree of reaction, and reducing pores

Inactive Publication Date: 2016-02-03
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At high temperature, alumina easily reacts strongly with metal titanium to form TiAl, Ti 3 Intermetallic compounds such as Al, which have severe room temperature brittleness, thereby reducing the mechanical properties of titanium / alumina composites

Method used

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  • Titanium/aluminum oxide interface reaction control and optimization method
  • Titanium/aluminum oxide interface reaction control and optimization method
  • Titanium/aluminum oxide interface reaction control and optimization method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Mix alumina and cerium oxide at a mass ratio of 10:0.41, a total of 30g, pour it into a resin spherical tank, add alumina balls according to a ball-to-material ratio of 3:1, and mix 100ml of absolute ethanol with every 10g of powder Add 300ml of dehydrated ethanol according to the ratio. Mix in a planetary mill for 3 hours at a speed of 200r / min. The mixed slurry was dried at 50° C. for 4 hours to obtain raw materials. Put 2 g of titanium powder into a mold and pressurize at 30 MPa to form a titanium sheet of 4 cm×1 cm×2 mm. Put 15g of the prepared mixed powder into a graphite mold with an inner diameter of 45mm and pave it flat, then put in the pressed titanium sheet, add another 15g of mixed powder into the grinding tool, pressurize at 30MPa, and obtain a green body. Then put the green body into the graphite grinding tool and sinter in the vacuum hot pressing sintering furnace, the sintering temperature is 1350°C, the heating rate is 10°C / min (0-1200°C) and 5°C / min ...

Embodiment 2

[0028] Mix alumina and yttrium oxide at a mass ratio of 10:0.27 and pour it into a resin spherical tank, a total of 30g, add alumina balls according to a ball-to-material ratio of 3:1, and mix 100ml of absolute ethanol with every 10g of powder Proportionally add 300ml of absolute ethanol. Mix in a planetary mill for 3 hours at a speed of 200r / min. The mixed slurry was dried at 50° C. for 4 hours to obtain raw materials. Put 2 g of titanium powder into a mold and pressurize at 30 MPa to form a titanium sheet of 4 cm×1 cm×2 mm. Put 15g of the prepared mixed powder into a graphite mold with an inner diameter of 45mm and pave it flat, then put in the pressed titanium sheet, add another 15g of mixed powder into the grinding tool, pressurize at 30MPa, and obtain a green body. Then put the green body into the graphite grinding tool and sinter in the vacuum hot pressing sintering furnace, the sintering temperature is 1350°C, the heating rate is 10°C / min (0-1200°C) and 5°C / min (1200-...

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Abstract

The invention discloses a titanium / aluminum oxide interface reaction control and optimization method. A sample is prepared through the following steps: mixing aluminum oxide with cerium oxide in a mass ratio of 10: (0.40-0.47), or with yttrium oxide in a mass ratio of 10: (0.21-0.28), producing a titanium / aluminum oxide test sample green body by use of a powder wrapping method, adopting a vacuum hot pressed sintering technique, heating at a sintering temperature of 1200-1350 DEG C at rates of 5 DEG C / min at and 10 DEG C / min at 0-1200 DEG C, and applying a pressure of 30MPa at the temperature of 135 DEG C and preserving heat for 1.5 hours, thereby obtaining the sample. A thickness, a microstructure and a phase composition of a titanium / aluminum oxide interface reaction layer are tested at 1350 DEG C by use of SEM, EDS and XRD analysis methods to find out that the interface reaction is controlled to a certain extent and an interface structure is optimized when the cerium oxide or the yttrium oxide is added; the method is simple and provides basis for controlling the titanium / aluminum oxide interface reaction.

Description

technical field [0001] The invention relates to a method for controlling and optimizing titanium / alumina interface reaction, which belongs to the technical field of cermet composite materials. Background technique [0002] Metal-ceramic composite materials refer to the composite materials of ceramics and metals made by powder metallurgy. It can overcome the shortcomings of a single material and combine the high hardness, strength, wear resistance of ceramics and the good ductility, toughness and electrical conductivity of metals. , It has a wider application prospect in the fields of aviation, aerospace, cutting tools and high-temperature transmission parts. [0003] The selection principles of the ceramic-metal composite material system are: mutual matching in physical properties; mutual matching in chemical properties; scientificity of preparation technology. Metal titanium has the characteristics of light weight, high melting point, and good physical and chemical compati...

Claims

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Application Information

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IPC IPC(8): C22C1/05C04B35/10
Inventor 刘美佳王志吴俊彦李庆刚张柳徐菡卿
Owner UNIV OF JINAN