Aluminum oxide/nickel-titanium alloy/aluminum oxide composite material prepared through diffusion bonding and method thereof

A technology of nickel-titanium alloy and composite material, which is applied in the field of alumina/nickel-titanium alloy/alumina composite material to achieve the effects of high efficiency, excellent mechanical properties and uniform diffusion

Active Publication Date: 2020-12-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] So far, ceramics have rarely joined workpieces wi

Method used

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  • Aluminum oxide/nickel-titanium alloy/aluminum oxide composite material prepared through diffusion bonding and method thereof
  • Aluminum oxide/nickel-titanium alloy/aluminum oxide composite material prepared through diffusion bonding and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A 1 mm thick Ni-Ti alloy sheet was placed on two Al 2 o 3 Sandwich-structured samples in ceramic plates;

[0040] Then, place it in a graphite mold, fasten it with a constant torque wrench, apply a pressure of 1 kPa, and anneal it in a vacuum carbon tube furnace with argon gas at a reaction temperature of 1250° C., and keep it warm for 2 hours.

[0041] see figure 1 and figure 2, the sample was cut along the direction perpendicular to the interface, and the interface was tested by SEM and EDS. The results show that the nickel-titanium alloy reacts chemically with alumina to form AlNi 2 For Ti and TiO, the thickness of the interface layer is 20 μm and 18 μm respectively, the interface layer is relatively thin, and no continuous interface layer is formed.

Embodiment 2

[0043] A 1 mm thick Ni-Ti alloy sheet was placed on two Al 2 o 3 Sandwich-structured samples in ceramic plates;

[0044] Then, place it in a graphite mold, tighten it with a constant torque wrench, apply a pressure of 2kPa, and anneal it in a vacuum carbon tube furnace with argon gas at a reaction temperature of 1400°C for 4 hours.

[0045] The samples were cut along the direction perpendicular to the interface, and the interface was tested by SEM and EDS. The results show that the nickel-titanium alloy reacts chemically with alumina to form AlNi 2 For Ti and TiO, the interface layer thicknesses are 22 μm and 4 μm.

Embodiment 3

[0047] A 1 mm thick Ni-Ti alloy sheet was placed on two Al 2 o 3 Sandwich-structured samples in ceramic plates;

[0048] Then, place it in a graphite mold, tighten it with a constant torque wrench, apply a pressure of 4kPa, and anneal it in a vacuum carbon tube furnace with argon gas, and keep it warm for 6h.

[0049] The samples were cut along the direction perpendicular to the interface, and the interface was tested by SEM and EDS. The results show that the nickel-titanium alloy reacts chemically with alumina to form AlNi 2 For Ti and TiO, the interface layer thicknesses are 18 μm and 14 μm.

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Abstract

The invention discloses an aluminum oxide/nickel-titanium alloy/aluminum oxide composite material prepared through diffusion bonding and a method of the composite material. Nickel-titanium alloy sheets and aluminum oxide sheets are used as raw materials, and the nickel-titanium alloy sheets are placed between the two aluminum oxide sheets to prepare a sample with a sandwich structure; the obtainedsandwich structure sample is placed in a graphite mold and fastened; and the graphite mold is put into a vacuum carbon tube furnace to be subjected to annealing treatment, and the aluminum oxide/nickel-titanium alloy/aluminum oxide sandwich layered composite material is prepared. According to the invention, the ceramic toughness of Al2O3 is improved, and reliable connection between Al2O3 ceramicand metal is realized.

Description

technical field [0001] The invention belongs to the technical field of ceramic-based composite materials, and in particular relates to an alumina / nickel-titanium alloy / alumina composite material prepared by diffusion connection and a method thereof. Background technique [0002] Alumina (Al 2 o 3 ) is a well-known ceramic that has been widely used in many fields due to its excellent heat resistance, high electrical conductivity, ultra-high hardness, light weight and excellent wear resistance. However, its inherent brittleness makes Al 2 o 3 It is extremely difficult to form structural components of large dimensions or complex geometries for engineering applications. On the contrary, Al 2 o 3 The workpiece is usually combined with the metal to form a multiphase composite, which reconciles the thermal stability and wear resistance of the ceramic with the toughness of the metal, which in turn expands the bulk Al 2 o 3 As an important engineering ceramics application ran...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B18/00B32B9/04B32B15/04B32B33/00B32B37/10B32B38/18
CPCB32B9/005B32B18/00B32B9/041B32B15/04B32B33/00B32B37/10B32B38/1816B32B2038/0048B32B2250/03B32B2250/40B32B2307/558
Inventor 李烨飞牛瑞霞李海生李书文郑巧玲亦雨奇
Owner XI AN JIAOTONG UNIV
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