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A kind of graphene-reinforced dual-phase metal aluminide composite material and preparation method thereof

A technology of composite materials and aluminides, applied in the field of high-temperature materials, can solve the problems of high density and lower specific strength of composite materials, and achieve the effect of high hardness

Active Publication Date: 2019-02-05
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the density of these ceramic fibers / particles is relatively high, thus reducing the specific strength of the composite

Method used

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  • A kind of graphene-reinforced dual-phase metal aluminide composite material and preparation method thereof
  • A kind of graphene-reinforced dual-phase metal aluminide composite material and preparation method thereof
  • A kind of graphene-reinforced dual-phase metal aluminide composite material and preparation method thereof

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preparation example Construction

[0047] The present invention also provides a preparation method of a dual-phase metal aluminide composite material, comprising the following steps:

[0048] A) after graphene, dispersant and water are dispersed, obtain graphene dispersion liquid;

[0049] B) After adding nickel powder and aluminum powder to the graphene dispersion obtained in the above steps to disperse again, through ball milling, to obtain mixed powder;

[0050] C) After sintering the mixed powder obtained in the above steps, a dual-phase metal aluminide composite material is obtained.

[0051] The raw material ratio and optimization principles in the preparation method of the present invention correspond to the composition and ratio selection of the aforementioned dual-phase metal aluminide composite material, as well as the optimization principles, and will not be repeated here.

[0052] In the present invention, firstly, the graphene, the dispersant and water are dispersed to obtain the graphene dispersi...

Embodiment 1

[0091] Preparation technology is the same as embodiment

[0092] Nickel powder and aluminum powder are used as raw powders (proportioned according to the atomic percentage of Ni being 72.5%), without adding graphene, nickel powder and aluminum powder are ultrasonically dispersed, ball milled, dried, and ground to form a sintered powder. The dried powder was sintered in a discharge plasma device, the heating rate was 150°C / min, the sintering pressure was 40MPa, the sintering temperature was 1250°C, the holding time was 6min, and the dual-phase metal aluminide was obtained.

[0093] The detection and characterization of the dual-phase metal aluminides prepared in the examples of the present invention were carried out.

Embodiment 2

[0095] Preparation technology is the same as embodiment

[0096] Nickel powder, aluminum powder (proportioning according to the atomic percentage of Ni is 72.5%) and graphene are used as raw powder, wherein the weight ratio of graphene is weighed at 0.5wt%, and graphene, nickel powder and aluminum powder are ultrasonically dispersed respectively , ball milled, dried, and ground as a sintered mixed powder. The mixed powder was sintered in a discharge plasma device, the heating rate was 150°C / min, the sintering pressure was 40MPa, the sintering temperature was 1250°C, and the holding time was 6min to obtain a graphene-reinforced nickel-aluminum dual-phase intermetallic compound composite material .

[0097] The dual-phase metal aluminide composite material prepared in the embodiment of the present invention was detected and characterized.

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Abstract

The invention provides a graphene-reinforced biphase metal aluminide composite material. The graphene-reinforced biphase metal aluminide composite material comprises a main crystal phase and a reinforcement phase, wherein the main crystal phase is a biphase mixture of NiAl and Ni3Al, and the reinforcement phase is graphene. A metal aluminide composite material system is designed, wherein the graphene is adopted as reinforcement, and particularly, a (NiAl-Ni3Al) biphase mixture is used as a high temperature composite material of a matrix. The metal aluminide has the distinctive physical and chemical properties such as the strong bond combination property allowing metallic bonds and covalent bonds to coexist, the high high-temperature hardness and special chemical components, the graphene has the properties such as excellent mechanical property, excellent matching property of high temperature strength and toughness and good high temperature oxidation resistance, and therefore the nickel-aluminum metal aluminide composite material can have high specific strength.

Description

technical field [0001] The invention belongs to the technical field of high-temperature materials, and relates to a dual-phase metal aluminide composite material and a preparation method thereof, in particular to a graphene-enhanced dual-phase metal aluminide composite material and a preparation method thereof, in particular to a graphene-enhanced nickel Aluminum dual-phase intermetallic compound composite material and preparation method thereof. Background technique [0002] Metal aluminum compounds (NiAl and Ni 3 Al) has a high melting point, high hardness, low density and good oxidation resistance, between nickel-based superalloys and high-temperature ceramic materials, and is expected to become a new generation of high-temperature structural materials. Among them, the melting point of NiAl intermetallic compound is about 1638°C, and the density is about 5.86g / cm 3 , 1300 ℃ can still maintain good high temperature oxidation resistance. Ni 3 The melting point of the Al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/05
CPCC22C1/05C22C19/007C22C19/03C22C32/0084
Inventor 陈瑶宋英刘卫卫王永光周波赵栋
Owner SUZHOU UNIV