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Method for realizing diffusion bonding of aluminum oxide ceramic based on aluminum oxide-titanium-nickel

A technology of alumina ceramic and diffusion connection, applied in the field of welding, can solve the problems of difficult connection and poor weldability, and achieve the effect of expanding the effective contact area, preventing oxidation and high connection strength

Inactive Publication Date: 2020-12-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially some alloys such as ceramics, intermetallic compounds, amorphous materials and single crystal alloys have poor weldability, and it is difficult to achieve reliable connections with traditional fusion welding methods

Method used

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  • Method for realizing diffusion bonding of aluminum oxide ceramic based on aluminum oxide-titanium-nickel
  • Method for realizing diffusion bonding of aluminum oxide ceramic based on aluminum oxide-titanium-nickel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Place Ni and Ti sheets with thicknesses of 0.05mm and 0.05mm respectively on two pieces of Al with thicknesses of 1mm 2 o 3 Al 2 o 3 -Ti-Ni-Ti-Al 2 o 3 Then, place it in a graphite mold, tighten it with a constant torque wrench, apply a pressure of 5kPa, and anneal it in a vacuum carbon tube furnace with argon gas. The reaction temperature is 1350°C, and the holding time is 6h.

[0030] see figure 1 and figure 2 , the diffusion is very uniform, Al 2 o 3 Diffusion occurs in Al, Ni and Ti at the same time, the sample is cut along the direction perpendicular to the interface, and the interface is tested by SEM and EDS. The results show that nickel, titanium and alumina react chemically to form Ni 3 Ti(Al / O) solid solution and TiO.

Embodiment 2

[0032] Place Ni and Ti sheets with thicknesses of 0.06mm and 0.06mm respectively on two pieces of Al with thicknesses of 2mm 2 o 3 Al 2 o 3 -Ti-Ni-Ti-Al 2 o 3 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. The reaction temperature is 1400°C, and the holding time is 10h.

[0033] The samples were cut along the direction perpendicular to the interface, and the interface was tested by SEM and EDS. The results show that nickel, titanium and alumina react chemically to form Ni 3 Ti(Al / O) solid solution and TiO.

Embodiment 3

[0035] Place Ni and Ti sheets with thicknesses of 0.08mm and 0.08mm respectively on two pieces of Al with thicknesses of 3mm 2 o 3 Al 2 o 3 -Ti-Ni-Ti-Al 2 o 3 Then, place it in a graphite mold, tighten it with a constant torque wrench, apply a pressure of 3kPa, and anneal it in a vacuum carbon tube furnace with argon gas at a reaction temperature of 1450°C and a holding time of 4h.

[0036] The samples were cut along the direction perpendicular to the interface, and the interface was tested by SEM and EDS. The results show that nickel, titanium and alumina react chemically to form Ni 3 Ti(Al / O) solid solution and TiO.

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Abstract

The invention discloses a method for realizing diffusion bonding of aluminum oxide ceramic based on aluminum oxide titanium nickel. The method comprises the following steps: preparing a pure Ti foil and a pure Ni foil with square structures, and an Al2O3 sheet , respectively washing the pure Ti foil, the pure Ni foil and the Al2O3 sheet with concentrated HNO3 and a 10% HCl solution, and preparingthe pure Ti foil, the pure Ni foil and the Al2O3 sheet into a diffusion couple with an Al2O3-Ti-Ni-Ti-Al2O3 structure; then applying pressure to two sides of the diffusion couple by using graphite flakes for fixing; and carrying out annealing treatment to realize diffusion bonding of the aluminum oxide ceramic. According to the invention, the two materials can be reliably combined, the excellent performance of the two materials is fully utilized, the quality of the joint is stable, and the connecting strength is high.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a diffusion bonding method for realizing alumina ceramics based on alumina-titanium-nickel. Background technique [0002] During the production of new materials, problems with the material itself or its connection with other materials are often encountered. In particular, some alloys such as ceramics, intermetallic compounds, amorphous materials, and single crystal alloys have poor weldability, and it is difficult to achieve reliable connections with traditional fusion welding methods. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for diffusion bonding of alumina ceramics based on alumina-titanium-nickel to study nickel, titanium and alumina by controlling the connection temperature and holding time. interface reaction, optimize the interface structure, and then improve the mechanical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/00
CPCC04B37/003C04B2237/12C04B2237/122C04B2237/123
Inventor 李烨飞牛瑞霞李书文李海生郑巧玲亦雨奇
Owner XI AN JIAOTONG UNIV
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