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Method for preparing ceramic reinforced metal-based porous composite material

A composite material and metal technology, which is applied in the field of preparation of Al2O3 ceramic reinforced Fe-Cr-Ni metal matrix porous composite materials, can solve the problems of high cost, long period of porous materials, large energy consumption, etc. The effect of short preparation cycle and low sintering temperature

Inactive Publication Date: 2008-04-30
XI AN JIAOTONG UNIV
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Problems solved by technology

The porous material prepared by this method has a long cycle, high energy consumption and high cost, and is not suitable for preparing porous superalloy composite materials with high melting point

Method used

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  • Method for preparing ceramic reinforced metal-based porous composite material

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with specific examples, but the present invention is not limited to these examples.

[0026] A method for rapidly preparing nano-ceramic reinforced metal (Fe-Cr-Ni alloy)-based porous composite materials at low temperature by using the aluminothermic in-situ reaction technology. In this experiment, the powder metallurgy mixed component method was used to prepare the prefabricated powder, and the Fe 2 o 3 (nanometer), Cr 2 o 3 (nanometer), Ni 2 o 3 (nanometer), Al (micron), Fe (micron), Ni (micron), Cr (micron) are mixed according to the aforementioned reaction formula (2), (3) or (4) and the stoichiometric ratio of the combination, and after pressing into a billet Pressureless sintering was performed under vacuum.

[0027] During the whole sintering process, the aluminothermic reaction is used, so that the aluminum and the original oxide react to prepare the nano-ceramic phase, and the ...

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Abstract

The invention discloses a low-cost low-temperature quick preparation method for nano Al2O3 ceramic original position enforcing Fe-Cr-Ni-base high temperature alloy porous compound material. Initializing powder is prepared in a powder metallurgy mixing component method, nano grade Fe2O3, Cr2O3, Ni2O3 powder and nano grade Al, Ni, Cr, and Fe primitive powder are converted into mass percentage according to the stoichiometric proportion of the reaction formula to be weighed and mixed, and are performed with non-pressure sintering at 800 DEG C under the vacuum condition after being compressed into billet, the whole sintering process is performed through the aluminum thermal reaction method, and minute multi-alloy elements are matched in the component compounding ratio to adjust the air hole rate and to enhance the mechanical property of the material. The method can greatly reduce the preparation temperature, reduce the preparation time, and also reduce the production cost.

Description

technical field [0001] The invention relates to a method for preparing a metal-based porous composite material, in particular to an Al 2 o 3 A preparation method of ceramic reinforced Fe-Cr-Ni metal matrix porous composite material. Background technique [0002] my country has a certain production capacity of powder sintered porous materials, such as sintered bronze, stainless steel, nickel and nickel alloys, titanium and other materials, the output reached 900,000 pieces, 36,000 pieces, 7,000 pieces and 16,000 pieces respectively. However, the metal porous materials produced in China are mainly copper, nickel, titanium, stainless steel sintered porous materials and stainless steel fiber felt materials; in addition to these materials abroad, composite wire mesh and foam metal materials are also produced in large quantities, and new composite structures are being developed Porous materials such as porous ceramic metal composites. Porous metal is composed of metal skeleton ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05B22F9/04B22F3/16
Inventor 杨建锋高积强陈畅初丛阳乔冠军
Owner XI AN JIAOTONG UNIV
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