Method for connecting Cf/Al composite with TiAl based on laser ignition and self-propagating reaction

A composite material, laser ignition technology, used in welding/cutting media/materials, laser welding equipment, welding/cutting auxiliary equipment, etc. Good performance, high connection efficiency, guaranteed uniformity

Inactive Publication Date: 2014-02-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology allows for better joining between different types of substrates while minimizing any thermal energy input during bond formation process compared to existing methods like resistance spotweld or brazing. It also improves upon certain properties such as tensile strength (upwards 2 MPa) when connecting two parts together through fusion processes that create strong bonds. Overall, these technical improvements improve the quality and reliability of ceramic/metal composites used in structures made from them.

Problems solved by technology

This patented technical solution describes how an intermetal bonded or joined ceramic/plenum composite structure works well for applications requiring strong mechanical properties like aircraft frames. However, this technology suffers from poor compatibility issues during manufacturing processes involving joining different types of metals together. These challenges include weak coherence and cracks under stress conditions while generating large amounts of waste upon exposure to extreme temperatures.

Method used

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  • Method for connecting Cf/Al composite with TiAl based on laser ignition and self-propagating reaction
  • Method for connecting Cf/Al composite with TiAl based on laser ignition and self-propagating reaction

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Experimental program
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specific Embodiment approach 1

[0013] Specific implementation mode 1: In this implementation mode, the laser ignites the self-propagating connection C f / Al composite material with the method of TiAl, proceed as follows:

[0014] 1. Preparation of mixed powder: Weigh 61-65 parts of nickel powder, 31-33 parts of aluminum powder and 3-7 parts of titanium powder in parts by weight and mix them evenly, then put them in the ball mill tank, and the mass ratio of ball to material is 5 Put the ball into the ball at a ratio of 1, and ball mill at a speed of 300r / min to 500r / min for 2h to 3h under the protection of argon to obtain a mixed powder;

[0015] 2. Preparation of the intermediate layer compact: compress the mixed powder obtained in step 1 into an intermediate layer compact with a relative density of 60% to 80% and a thickness of 1mm to 2mm, and seal it for storage;

[0016] 3. C f / Al composite surface pretreatment and TiAl surface pretreatment: the C f / Al composite surface and TiAl surface with 200 # ...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that: the mesh number of the nickel powder in step 1 is ≥ 200 mesh. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the mesh number of the aluminum powder described in step 1 is ≥ 325 mesh. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for connecting a Cf/Al composite with TiAl based on the laser ignition and the self-propagating reaction and relates to a method for connecting the Cf/Al composite with the TiAl. The method for connecting the Cf/Al composite with the TiAl based on the laser ignition and the self-propagating reaction mainly aims to solve the problems that according to a conventional welding method, due to the over-high heating temperature, over-high pressure and the like, a serious interfacial reaction occurs between carbon fibers and an aluminum matrix in the Cf/Al composite, interfacial bonding is damaged, and the performance of base metal is exacerbated. The method for connecting the Cf/Al composite with the TiAl based on the laser ignition and the self-propagating reaction comprises the steps of preparing mixed powder, preparing the compact of a middle layer, pretreating the surface of the Cf/Al composite and the surface of the TiAl, and conducting laser ignition. When the method is adopted to connect the Cf/Al composite with the TiAl, the middle layer reacts completely under the ignition of lasers, uniform products are generated, no remaining metal particle exists, and therefore the uniformity of the performance of a joint is guaranteed. The method can be used for connecting the Cf/Al composite with the TiAl.

Description

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Claims

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Application Information

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Owner HARBIN INST OF TECH
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