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Titanium aluminum-ceramic layered material and preparation method thereof

A technology of layered materials and ceramic layers, applied in the field of layered materials and their preparation, can solve the problems of uncontrollable composition, aluminum melting loss, etc., and achieve the effects of low cost, improved performance, and dense materials

Inactive Publication Date: 2013-08-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of uncontrollable composition due to aluminum melting and loss in the process of preparing TiAl-based substrates by the elemental foil reaction annealing method, and provides a titanium-aluminum-ceramic layered material and its preparation method

Method used

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  • Titanium aluminum-ceramic layered material and preparation method thereof
  • Titanium aluminum-ceramic layered material and preparation method thereof
  • Titanium aluminum-ceramic layered material and preparation method thereof

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specific Embodiment approach 1

[0020] Specific Embodiment 1: In this embodiment, a titanium-aluminum-ceramic layered material is made by using in-situ autogenous technology to alternately laminate pure Ti foils and Al-based composite material foils, hot press and reactive annealing; the titanium-aluminum-ceramics In the ceramic layered material, the TiAl layer and the ceramic layer are distributed alternately, the stacking distance is 5 μm to 100 μm, and the ceramic layer includes Ti 2 AlC phase and Ti 3 AlC phase, TiAl layer is lamellar γ-TiAl / α 2 -Ti 3 Al, the lamellar spacing is 100nm-500nm; the Al-based composite material foil is made of reinforcement and pure Al powder through powder mixing, hot-pressing sintering and rolling.

[0021] The lamination spacing described in this embodiment refers to the distance between TiAl layers or the distance between ceramic layers; the interlamellar spacing refers to the distance between γ-TiAl sheets in the TiAl layer or α 2 -Ti 3 Distance between Al sheets.

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specific Embodiment approach 2

[0028]Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the single-layer thickness of the pure Ti foil is 50 μm to 200 μm, and the single-layer thickness ratio of the pure Ti foil to the Al-based composite material foil is (1.04 ~1.14):1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume fraction of pure Al powder in the Al-based composite material foil is 85% to 99.9%, and the reinforcement in the Al-based composite material foil The volume fraction is 0.1% to 15%. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a titanium aluminum-ceramic layered material and a preparation method thereof, which relate to a layered material and a preparation method thereof, and mainly solve the problem that aluminum fusion loss causes uncontrollable constituents when an element foil reaction annealing method is used for preparing a TiAl base plate material. The titanium aluminum-ceramic layered material is made by an in-situ synthesis technology and prepared from pure Ti foils and an Al base composite foils through alternating lamination, hot-pressing and reaction annealing. The method comprises the following steps of: firstly, preparing an Al base composite material; secondly, carrying out hot extrusion and rolling on the Al base composite material; thirdly, carrying out surface preparation on the rolled Al base composite material foils and the pure Ti foils; fourthly, carrying out alternating lamination and hot-pressing on the foils; fifthly, performing low temperature thermal treatment; sixthly, performing thermal treatment for densifying; and seventhly, performing heat preservation, thus obtaining the titanium aluminum-ceramic layered material. The preparation method provided by the invention is used for preparing the titanium aluminum-ceramic layered material.

Description

technical field [0001] The invention relates to a layered material and a preparation method thereof. Background technique [0002] Titanium-aluminum-based alloy is a new type of lightweight heat-resistant structural material, which has the advantages of light weight, high strength, corrosion resistance, wear resistance, and high temperature resistance. It has become a key material for research and application in aviation, aerospace, and military fields around the world. After decades of hard work, titanium-aluminum-based alloys have entered the stage of practical development. Among them, the demand for titanium-aluminum-based alloy sheets and foils is the most urgent. However, the poor fracture toughness and plasticity of single-phase TiAl-based intermetallic compounds make it difficult to form TiAl-based substrates. It is quite difficult to prepare TiAl-based substrates by traditional hot rolling methods, and the rolling environment and equipment are very demanding. Based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/04B32B15/20B32B15/00B32B18/00B32B37/06B32B37/10
Inventor 范国华吴昊崔喜平耿林郑镇洙黄猛逄锦程杜岩
Owner HARBIN INST OF TECH
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