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In-situ self-generated reinforced Ni3Al composite and method for preparing same

A composite material and in-situ self-generation technology, which is applied in the field of composite materials and its preparation, can solve problems such as poor brittleness, and achieve high density, fine grains, and firm bonding

Inactive Publication Date: 2008-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For existing Ni 3 Al-based alloys have the defect of poor brittleness. The present invention aims to mechanically activate Ni-Al-Ti-B powder by adopting high-energy ball milling method, and adopt spark plasma sintering process to generate fine-grained TiB / Ni in situ. 3 Al composite material, the material prepared by this method improves the toughness while improving the hardness of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0017] Specific implementation mode one: the in-situ self-generated reinforced Ni of this embodiment mode 3 The Al composite material is composed of four components: Ni, B, Ti, and Al, and the stoichiometric ratio of each component is Ni:Al=2.704~3:1; Ti:B=1.04~1.45:1, and TiB accounts for the total volume of the composite material 3-20% of the total.

[0018] In this embodiment, the particle size range of the nickel powder (Ni) is 10 μm, the average particle size of the aluminum powder (Al) is about 3 μm, the particle size of the titanium powder (Ti) is 10 μm, and the particle size of the boron powder (B) is 3 μm.

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the stoichiometric ratio of each component is Ni:Al=3:1, B:Ti=1:1.2, and TiB accounts for 5% of the total volume of the composite material.

specific Embodiment approach 3

[0020] Embodiment 3: This embodiment differs from Embodiment 1 in that the stoichiometric ratio of each component is Ni:Al=3:1, B:Ti=1:1.446, and TiB accounts for 10% of the total volume of the composite material.

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PUM

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Abstract

The invention relates to origin self- generating Ni3Al compounding material and the method to manufacture. It has four constituents of Ni, B, Ti, and Al. The chemical measuring ratio is that Ni: Al=2.704-3:1, Ti:B=1.04:1, and TiB occupied 3-20% volume of the tally compounding material. The method includes activating Ni-Al-Ti-B system to gain compounding powder and generating TiB / Ni3Al compounding material by discharging plasma sintering origin self generating. The invention has the advantages of fine particle, equally organized, and good mechanical capability.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to an in-situ self-generated TiB / Ni based on Ni-Al-Ti-B system 3 Al composite material and its preparation method. Background technique [0002] Ni 3 Al-based alloys are one of the most studied metal compounds, which have an L12-type ordered crystal structure. Ni 3 Al single crystals are plastic at room temperature, while polycrystalline Ni 3 Al fails in a brittle intergranular fracture mode, indicating that the grain boundaries are inherently brittle. Ni 3 The anomalous strengthening phenomenon that occurs in Al alloys, that is, the phenomenon that the yield strength increases with increasing temperature, makes this alloy competitive at higher temperatures. Ni 3 Al intermetallic compounds have the characteristics of good oxidation resistance, low density, high room temperature work hardening rate and high high temperature strength. They are regarded as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/04C22C1/04
Inventor 耿林曹国剑奈贺正明郑镇洙
Owner HARBIN INST OF TECH