Carbon nanotube toughened connection layer and method between inorganic composite material and nickel-based superalloy material

An inorganic composite material, nickel-based superalloy technology, applied in the direction of carbon nanotubes, nanocarbons, metal layered products, etc., can solve the problems of mismatching, lack of thermal expansion coefficient, cracks and faults in the connecting layer, etc., to achieve enhanced The effect of bonding strength, improving interfacial bonding force, and significant economic and social benefits

Active Publication Date: 2019-06-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the main reasons for the failure of the connection between inorganic composite materials and nickel-based superalloys are: (1) the large difference in physical and chemical properties between non-homogeneous materials makes cracks and faults prone to occur in the connection layer; (2) the connection between inorganic composite materials and The thermal expansion coefficients of nickel-based superalloys do not match, and there is a lack of connecting layer materials with similar thermal expansion coefficients to inorganic composite materials to relieve the resulting thermal stress in the connecting layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Polish and clean the surfaces of the inorganic composite material and the nickel-based superalloy, and dry them in an oven for later use.

[0023] 2) In-situ growth of carbon nanotubes on the surface of the composite material to form a porous nanotube layer, the specific steps are as follows: place the C / C composite material sample in a quartz tube, and raise the temperature to 780 °C under an Ar gas atmosphere. Dissolve ferrocene in a mixed solution of ethylenediamine and ethanol at a concentration of 0.01g / mL, and inject it into the quartz tube at a rate of 10ml / h after ultrasonic homogenization. During the injection, the flow rate of Ar was adjusted to 1000 sccm, the growth time was 10 min, and then cooled to room temperature with the furnace to obtain the C / C composite material with in-situ growth of carbon nanotubes on the surface.

[0024] 3) Stack the C / C composite material, intermediate layer and nickel-based superalloy in the order of C / C composite material / ...

Embodiment 2

[0026] 1) Polish and clean the surfaces of the inorganic composite material and the nickel-based superalloy, and dry them in an oven for later use.

[0027] 2) In-situ growth of carbon nanotubes on the surface of the composite material to form a porous nanotube layer, the specific steps are as follows: place the C / C composite material sample in a quartz tube, and raise the temperature to 800 °C under an Ar gas atmosphere. Dissolve ferrocene in a mixed solution of ethylenediamine and ethanol at a concentration of 0.02g / mL, and inject it into the quartz tube at a rate of 10ml / h after ultrasonic homogenization. During the injection, the Ar flow rate was adjusted to 1000 sccm, the growth time was 15 min, and then cooled to room temperature with the furnace to obtain a C / C composite material with in-situ growth of carbon nanotubes on the surface.

[0028] 3) Stack the C / C composite material, intermediate layer and nickel-based superalloy in the order of C / C composite material / Ti(30...

Embodiment 3

[0030] 1) Polish and clean the surfaces of the inorganic composite material and the nickel-based superalloy, and dry them in an oven for later use.

[0031]2) In-situ growth of carbon nanotubes on the surface of the composite material to form a porous nanolayer, the specific steps are as follows: place the C / C composite material sample in a quartz tube, and raise the temperature to 850 °C under an Ar gas atmosphere. Dissolve ferrocene in a mixed solution of ethylenediamine and ethanol at a concentration of 0.03g / mL, and inject it into the quartz tube at a rate of 10ml / h after ultrasonication. During the injection, the Ar flow rate was adjusted to 1000 sccm, the growth time was 20 min, and then cooled to room temperature with the furnace to obtain a C / C composite material with in-situ growth of carbon nanotubes on the surface.

[0032] 3) Stack the C / C composite material, intermediate layer and nickel-based superalloy in the order of C / C composite material / Ti(30μm) / Ni(30μm) / Cu(...

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Abstract

The invention relates to a carbon nanometer tube toughening connection layer between an inorganic composite material and a nickel-based high-temperature alloy material and a method. Firstly, carbon nanometer tubes with a nailing effect are generated in situ on the surface of a composite material; then, a Ti foil, a Ni foil and a Cu foil are used as middle layers for connecting the inorganic composite material and the nickel-based high-temperature alloy. Through the reaction between the middle layer and a mother material, a middle layer material is filled in nanometer tube pores; the nanometer tube toughening connection layer is obtained; the bonding intensity between interfaces of the composite material and the nickel-based high-temperature alloy can be enhanced; the problem of heat stress concentration due to great heat expansion coefficient differences between the mother material and the connection layer is solved; the strong combination between the inorganic composite material and the nickel-based high-temperature alloy is realized. The obtained nanometer tube toughening connection layer has high connection intensity. The method has great application potentials and has obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the field of connection between inorganic composite materials and nickel-based high-temperature alloys, and relates to a carbon nanotube toughened connection layer and method between inorganic composite materials and nickel-based high-temperature alloy materials. Background technique [0002] Carbon-carbon (C / C) composite material is a strategic high-temperature structural material with a series of excellent properties such as low density, low thermal expansion coefficient, high specific strength, high temperature resistance, and corrosion resistance. The field has broad application prospects. However, because the C / C composite material is limited by the prefabricated body, it is difficult to be processed into complex parts and the production cost is high. At present, the manufacturing industry is still dominated by metal materials. In order to broaden the application range of C / C composite materials, the connection problem be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/04B32B15/20B32B3/26B32B37/10B32B37/06C01B32/16
CPCB32B3/26B32B15/04B32B15/043B32B15/20B32B37/06B32B37/10B32B2307/558
Inventor 史小红杨莉金秀秀李贺军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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