Method for improving comprehensive performance of carbon nanomaterial reinforced nickel-based superalloy

A technology of nickel-based superalloy and carbon nanomaterials, which is applied in the direction of nanotechnology, nanotechnology, metal material coating technology, etc., can solve the problems of poor mechanical properties and high-temperature oxidation resistance, reduced high-temperature oxidation resistance, and poor bonding of the substrate interface and other issues to achieve the effect of improving oxidation resistance, mechanical properties, and tensile strength

Inactive Publication Date: 2020-12-01
CENT SOUTH UNIV
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Problems solved by technology

[0006] The present invention is a method for improving the comprehensive performance of carbon nanomaterial-reinforced nickel-based superalloys, aiming at reducing the high-temperature oxidation resistance of carbon nanomaterial-reinforced nickel-based superalloys, the present invention proposes to coat the surface of carbon nanomaterials with a dense Ni layer for the first time to solve the problem Carbon nanomaterials are easy to agglomerate and poorly bonded to the matrix interface, resulting in poor mechanical properties and high-temperature oxidation resistance; through a specific ball milling process, a uniformly dispersed mixed powder of carbon nanomaterials is obtained to achieve further uniform dispersion of carbon nanomaterials; By SPS, hot isostatic pressing, hot pressing, hot extrusion or hot forging, or 3D printing and other powder forming methods, the carbon nanomaterial reinforced René 104 nickel-based composite material is prepared. The prepared material has excellent mechanical properties and excellent high temperature. Oxidation resistance, effectively solving the problem that carbon nanomaterials reinforced metal matrix composites cannot be used as high-temperature structural materials

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  • Method for improving comprehensive performance of carbon nanomaterial reinforced nickel-based superalloy
  • Method for improving comprehensive performance of carbon nanomaterial reinforced nickel-based superalloy
  • Method for improving comprehensive performance of carbon nanomaterial reinforced nickel-based superalloy

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Embodiment 1

[0060] Schematic diagram of the formation of carbon nanotubes (CNTs) reinforced René 104 nickel-based superalloy composites. figure 1 shown. First, the original multi-walled carbon nanotubes were modified by electroless plating, and then formed by ball milling and SPS.

[0061] The specific steps of CNTs electroless nickel plating: the multi-walled carbon nanotubes are soaked in concentrated nitric acid for 24 hours, filtered and washed with deionized water until neutral. The purified multi-walled carbon nanotubes were magnetically stirred in an aqueous solution (0.1M tin chloride / 0.1M hydrochloric acid) at 30° C. for 35 minutes, and then ultrasonically oscillated for 10 minutes for sensitization. After washing with deionized water, the sensitized MWCNTs were immersed in an aqueous solution (0.0014 M PdCl and 0.25 M hydrochloric acid) and activated at 30 °C for 24 h. After washing, the activated multi-walled carbon nanotubes were placed in an electroless plating solution.

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Embodiment 2

[0070] First, the original multi-walled carbon nanotubes were modified by electroless plating, and then 1.0wt.% Ni-CNTs and René104 powder were ball-milled together to prepare carbon nanotube-reinforced René104 composite samples by SLM.

[0071] The specific steps of CNTs electroless nickel plating: the multi-walled carbon nanotubes are soaked in concentrated nitric acid for 24 hours, filtered and washed with deionized water until neutral. The purified multi-walled carbon nanotubes were magnetically stirred in an aqueous solution (0.1M tin chloride / 0.1M hydrochloric acid) at 30° C. for 35 minutes, and then ultrasonically oscillated for 10 minutes for sensitization. After washing with deionized water, the sensitized MWCNTs were immersed in an aqueous solution (0.0014 M PdCl and 0.25 M hydrochloric acid) and activated at 30 °C for 24 h. After washing, the activated multi-walled carbon nanotubes were placed in an electroless plating solution.

[0072] Electroless plating was per...

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Abstract

The invention provides a method for improving the comprehensive performance of a carbon nanomaterial reinforced nickel-based superalloy, and belongs to the field of powder metallurgy and superalloy. Aiming at the problem that the high-temperature oxidation resistance of the carbon nanomaterial reinforced nickel-based superalloy is reduced, the surface of a carbon nanomaterial is coated with a compact Ni layer for the first time, so that the problems of poor mechanical property and high-temperature oxidation resistance caused by easy agglomeration of the carbon nanomaterial, poor bonding with amatrix interface and the like are solved. Through a specific ball milling process, mixed powder with uniformly dispersed carbon nanomaterials is obtained, and further uniform dispersion of the carbonnanomaterials is realized. A carbon nanomaterial reinforced Rene104 nickel-based composite material is prepared through spark plasma sintering (SPS), hot isostatic pressing, hot pressing, hot extrusion or hot forging, or 3D printing and other powder forming methods, so that the prepared material is excellent in mechanical property and excellent in high-temperature oxidation resistance, and the problem that the carbon nanomaterial reinforced metal-based composite material cannot be used as a high-temperature structural material is effectively solved.

Description

technical field [0001] The invention provides a method for improving the comprehensive performance of nickel-based superalloy reinforced by carbon nanomaterials, and belongs to the field of powder metallurgy and superalloy. Background technique [0002] Nickel-based superalloys are widely used in the manufacture of key hot-end components of aero-engines due to their excellent tensile strength, creep resistance, and fatigue crack growth resistance at high temperatures. The rapid development of a new generation of aerospace technology has put forward higher requirements for the comprehensive performance of nickel-based superalloys. Carbon nanomaterials (carbon nanotubes / graphene / carbon fibers) have the advantages of excellent strength, high thermal conductivity, and low thermal expansion coefficient, and are important reinforcement materials for metal matrix composites. [0003] Due to the surface van der Waals force, carbon nanomaterials are easy to agglomerate, and it is di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F3/105B22F1/00B22F1/02C22C1/05C22C1/10C23C18/36C23C18/18B82Y30/00B82Y40/00B33Y70/10
CPCB22F9/04C22C1/05C23C18/36C23C18/1886B82Y30/00B82Y40/00B33Y70/10B22F2009/043B22F2009/042B22F1/068B22F1/065B22F1/17
Inventor 刘祖铭魏冰农必重吕学谦任亚科曹镔艾永康
Owner CENT SOUTH UNIV
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