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Ceramic-TiAl micro-laminated composite material board and preparation method thereof

A composite material plate and composite material technology, which is applied in the field of micro-laminated composite material plate and its preparation, can solve the problems of insufficient fracture toughness and insufficient strength of TiAl composite material plate, and achieve good high-temperature plasticity, low cost, and improved performance. Effect

Inactive Publication Date: 2012-06-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of insufficient strength of monomeric TiAl intermetallic compounds at 800-1000°C and the problem that fine ceramic particle reinforcements are evenly distributed in the TiAl matrix in ceramic particle-reinforced TiAl-based composite materials prepared by traditional methods such as powder metallurgy and casting. The problem of insufficient fracture toughness of the TiAl composite material plate, and a kind of ceramic-TiAl micro laminated composite material plate and its preparation method are provided

Method used

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  • Ceramic-TiAl micro-laminated composite material board and preparation method thereof
  • Ceramic-TiAl micro-laminated composite material board and preparation method thereof

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specific Embodiment approach 1

[0019] Specific embodiment 1: The ceramic-TiAl micro-laminated composite material plate of this embodiment is made by alternately stacking, rolling and heat treatment of pure Ti foil and ceramic-reinforced Al-based composite foil. Ceramic-reinforced Al-based composite foil The material is made of ceramic reinforcement and pure Al powder by hot pressing, sintering and rolling; the ceramic layer and the TiAl layer in the ceramic-TiAl micro-laminated composite material plate are alternately overlapped, and the stacking interval is 20-200μm.

[0020] The ceramic reinforcement selected in this embodiment does not react with titanium and aluminum.

[0021] The ceramic-reinforced Al composite foil of this embodiment is a multilayer composite material in which ceramic layers and TiAl layers alternately overlap. It can not only fully play the role of toughening and strengthening the micro-laminated structure, but also exert the high-temperature performance of the ceramic phase. Solve the pr...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and embodiment 1 is that the thickness of a single layer of pure Ti foil is 100-500 μm, and the ratio of single layer thickness of pure Ti foil to ceramic-reinforced Al-based composite foil is 1: 0.88~0.98. Others are the same as the first embodiment.

[0023] The thickness of a single layer of pure Ti foil in this embodiment is preferably 200-250 μm.

[0024] The single-layer thickness ratio of the pure Ti foil and the ceramic-reinforced Al composite foil in this embodiment is preferably 1:0.91 to 0.97.

specific Embodiment approach 3

[0025] Specific embodiment three: The difference between this embodiment and specific embodiment one or two is: the volume fraction of pure Al powder in the ceramic reinforced Al-based composite foil is 90% to 99.9%, and the ceramic reinforced Al-based composite The volume fraction of the ceramic reinforcement in the foil is 0.1%-10%. Others are the same as the first or second embodiment.

[0026] In this embodiment, the respective volumes can be calculated based on the density and mass of the pure Al powder and the ceramic reinforcement.

[0027] In this embodiment, the volume fraction of pure Al powder in the ceramic reinforced Al composite foil is preferably 92% to 98%, and the volume fraction of ceramic reinforcement in the ceramic reinforced Al composite foil is preferably 2% to 8%.

[0028] In this embodiment, the volume fraction of pure Al powder in the ceramic reinforced Al composite foil is more preferably 94% to 96%, and the volume fraction of ceramic reinforcement in the ...

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Abstract

The invention relates to a ceramic-TiAl micro-laminated composite material board and a preparation method thereof, relates to a micro-laminated composite material board and a preparation method thereof, and is mainly used for solving the problems that the single TiAl intermetallic compound board has poor high-temperature strength so as not to satisfy the use requirements of aerospace high-temperature components working at 800-1000 DEG C and the TiAl composite material board, which is prepared by powder metallurgy, casting and other traditional methods and has the characteristic that a ceramic granule reinforcing body is uniformly distributed in a TiAl substrate, has poor fracture toughness. The ceramic-TiAl micro-laminated composite material board is prepared by alternately laminating and rolling pure Ti foils and ceramic-reinforced Al-based composite material foil materials, and carrying out heat treatment. The preparation method comprises the steps of: (1) preparing ceramic-reinforced Al-based composite material foil materials; (2) alternately laminating and rolling pure Ti foils and ceramic-reinforced Al-based composite material foil materials; (3) reacting and annealing; (4) carrying out compact treatment; and (5) carrying out high-temperature heat treatment, homogenizing and annealing. The ceramic-TiAl micro-laminated composite material board is used for aerospace machine manufacturing field.

Description

Technical field [0001] The invention relates to a micro-laminated composite material board and a preparation method thereof. Background technique [0002] TiAl-based alloy is one of the most promising lightweight high-temperature structural materials in the 21st century. As structural materials for supersonic aircraft and future turbine engines, as well as structural materials used in thermal protection systems, TiAl-based alloy sheets and foils are in urgent demand. At present, it is quite difficult to prepare TiAl-based alloy sheets by traditional hot rolling methods. Special rolling processes such as special sheath rolling and isothermal rolling are required. The rolling conditions are very demanding and the equipment requirements are high, which greatly increases the process cost. In addition, the high temperature performance of the single TiAl intermetallic compound sheet, such as high temperature strength, creep resistance and durability, is difficult to meet the requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/04B32B18/00B32B37/06B32B37/10
Inventor 耿林崔喜平彭华新范国华李爱斌张杰黄陆军
Owner HARBIN INST OF TECH
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