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Laminated NiAl material and preparation method thereof

A layered and laminated technology, applied in the direction of metal layered products, chemical instruments and methods, lamination, etc., can solve problems such as the difficulty of NiAl-based alloy plates, and achieve overcoming essential brittleness, simple production process, and easy industrial production Effect

Inactive Publication Date: 2013-04-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the NiAl material prepared by the existing NiAl material preparation method is difficult to prepare a NiAl-based alloy plate due to its intrinsic brittleness, and provides a layered NiAl material and a preparation method thereof

Method used

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  • Laminated NiAl material and preparation method thereof

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specific Embodiment approach 1

[0014] Embodiment 1: This embodiment is a layered NiAl material, which is prepared by alternate lamination of Ni foil and Al foil, and the crystal grains of the layered NiAl material are distributed in layers.

[0015] The crystal grains described in this embodiment have a great influence on the high-temperature mechanical properties of metal materials due to the grain size. When the temperature is high, the coarse-grained alloy has a higher creep limit and durable strength limit, and the layered NiAl material grains are distributed in layers, which has the advantages of fine-grained materials and coarse-grained materials at room temperature and high temperature. Its unique layered structure endows it with good mechanical properties.

[0016] The advantages of this embodiment: 1. In the preparation method of a layered NiAl material in this embodiment, a layered NiAl material with a layered distribution of grain size is obtained by laminating Ni foil and Al foil and then perfor...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that: the thickness of the Ni foil is 0.05mm-0.5mm; the thickness of the Al foil is 0.05mm-0.5mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Specific embodiment 3: The difference between this embodiment and specific embodiments 1 or 2 is that: after Ni foil and Al foil are alternately laminated, both the upper surface and the lower surface are Ni foil. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a laminated NiAl material and a preparation method of the laminated NiAl material, relates to the field of NiAl materials and preparation methods of the NiAl materials, and aims at solving the problems of an NiAl based alloy plate is difficult to prepare because of natural brittleness of the NiAl material prepared by the conventional preparation method. The laminated NiAl material is prepared by alternatively overlapping a Ni foil and an Al foil; and the grains of the laminated NiAl material are distributed in a lamination manner. The preparation method comprises the following steps: 1, preparing the Ni foil and the Al foil; 2, thermally pressing for the first time; and 3, thermally treating, and thermally pressing to obtain the laminated NiAl material. The laminated NiAl material with the coarse grains and fine grains distributed in the lamination manner, prepared by the preparation method of the laminated NiAl material, combines the advantages of the fine grain material at room temperature and the advantages of the coarse gain material at high temperature, and overcomes the shortcoming of natural brittleness. The laminated NiAl material is applicable to the field of high-temperature structural materials.

Description

technical field [0001] The invention relates to a NiAl material and a preparation method thereof. Background technique [0002] Due to the existence of metal bonds and covalent bonds in intermetallic compounds, covalent bonds strengthen the bonding force between atoms and stabilize chemical bonds, so that they have the characteristics of high melting point and high hardness; in addition, intermetallic compounds have good oxidation resistance. At the same time, due to the strengthening of the bonding force between atoms, the diffusion slows down, resulting in the increase of creep activation energy, thus having high creep resistance. Among the many intermetallic compounds, NiAl-based intermetallic compounds have attracted extensive attention and research by material scholars at home and abroad. Due to their low density and great advantages in both performance and cost, they are regarded as promising high-temperature materials. Structural materials. [0003] Over the past 30...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B37/10C22C19/03C22C21/00C22C30/00C22F1/04C22F1/00C22F1/10
Inventor 范国华杜岩王庆伟耿林张杰崔喜平郑镇洙王桂松李爱滨
Owner HARBIN INST OF TECH
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