Preparation method of SiC particle enhanced intermetallic compound based laminated composite material Ti/Al3Ti

A technology of intermetallic compounds and composite materials, which is applied in the field of preparation of particle-reinforced intermetallic compound-based composite materials, which can solve problems such as difficult control of layer spacing, layer thickness ratio, material performance adjustment and control, etc.

Active Publication Date: 2017-02-22
HARBIN ENG UNIV
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

However, in the process of preparing layered composite materials, it is difficult to control the layer spacing and layer thickness ratio, so it is difficult to adjust and control the properties of the material.

Method used

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  • Preparation method of SiC particle enhanced intermetallic compound based laminated composite material Ti/Al3Ti
  • Preparation method of SiC particle enhanced intermetallic compound based laminated composite material Ti/Al3Ti
  • Preparation method of SiC particle enhanced intermetallic compound based laminated composite material Ti/Al3Ti

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Embodiment Construction

[0018] SiC-Ti / Al of the present invention 3 The new preparation method of Ti layered composite material includes: (1) selecting 1000 mesh (13 μm) Al powder with 99.7% purity, 1000 mesh (13 μm) SiC powder with 99.9% purity and TC4 alloy foil; (2) weighing Measure 100g of Al powder and SiC powder with a mass percentage of 1% to 3% of Al powder, add stearic acid with a mass percentage of 1% of Al powder as a dispersant, and ball mill in a high-energy ball mill to achieve a uniform mixing effect; (3) ball mill The final powder is added to the grinding tool and the SiC particle reinforced aluminum matrix composite material is prepared by powder metallurgy technology. The powder metallurgy process is to heat up to 350°C for 1h and hold for 1h, then heat up to 620°C for 2h and then cool with the furnace. From the beginning of heating, the pressure is always Keep it at 35.5-40MPa; (4) Hot-roll the SiC particle-reinforced aluminum-matrix composite material into a foil plate between 450...

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Abstract

The invention provides a preparation method of a SiC particle enhanced intermetallic compound based laminated composite material Ti / Al3Ti. The preparation method comprises the following steps: (1) ball-milling gAl powder, SiC powder and stearic acid in a ball mill until the gAl powder, the SiC powder and the stearic acid are mixed uniformly; (2) adding ball-milled powder in a grinding tool and preparing into SiC particle enhanced aluminum-based composite materials by using a powder metallurgy method; (3) hot-rolling the SiC particle enhanced aluminum-based composite materials into foil plates at the temperature between 450 DEG C and 500 DEG C and then jointly cutting the foil plates and TC4 foil materials into materials with the same sizes; and (4) alternately arraying the TC4 foil materials and the SiC particle enhanced aluminum-based composite materials alternately; and (5) placing the materials in a vacuum hot pressing furnace and carrying out hot pressed sintering, vacuumizing at first until the pressure reaches 3*10<-2> Pa, then heating to the temperature of 675-680 DEG C step by step, insulating for 4 hours, then slowly heating to the temperature of 750 DEG C and insulating for 3 hours. The prepared composite material is excellent in comprehensive mechanical property and low in cost.

Description

technical field [0001] The invention relates to a method for preparing a particle-reinforced intermetallic compound-based layered composite material, in particular to a method for adding ceramic particles SiC to the layered composite material. Background technique [0002] Ti-Al intermetallic compounds have the characteristics of low density (less than half that of nickel-based alloys), high specific strength, high hardness, high elastic modulus, corrosion resistance, high temperature mechanical properties and excellent oxidation resistance. It has become a hot spot in research and development in recent years, and is widely used in aerospace structural materials. Ti-Al intermetallic compounds mainly include Ti 3 Al, TiAl and Al 3 Ti, where Al 3 Ti has higher elastic modulus (216GPa), stronger oxidation resistance and lower density (3.3g / cm 3 ) are particularly striking. However, its practical application is limited due to its low plastic toughness at room temperature. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04C22C1/05C22C21/00
CPCB22F7/04B22F2007/045C22C1/05C22C21/00
Inventor 姜风春王帅果春焕袁丁卢路牛中毅王振强常云鹏
Owner HARBIN ENG UNIV
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