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Method for preparing in-situ growed carbon nano tube reinforcing TiNi high-temperature solders

A technology of carbon nanotubes and high-temperature solder, which is applied in the direction of manufacturing tools, welding equipment, metal processing equipment, etc., can solve the problems of poor high-temperature mechanical properties and large thermal stress of joints, achieve low density and thermal expansion coefficient, improve mechanics, The effect of reliable connection and high temperature use

Active Publication Date: 2012-07-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the problems of large thermal stress and poor joint high-temperature mechanical properties of traditional TiNi solder when brazing and connecting ceramics, composite materials and metals; and provides a preparation method for in-situ growth of carbon nanotubes reinforced TiNi high-temperature solder

Method used

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  • Method for preparing in-situ growed carbon nano tube reinforcing TiNi high-temperature solders
  • Method for preparing in-situ growed carbon nano tube reinforcing TiNi high-temperature solders
  • Method for preparing in-situ growed carbon nano tube reinforcing TiNi high-temperature solders

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specific Embodiment approach 1

[0017] Specific embodiment one: in the present embodiment, the preparation method of in-situ growth carbon nanotube reinforced TiNi high-temperature solder is carried out according to the following steps:

[0018] 1. Weigh TiH according to the atomic percentage of Ti / Ni 1:1 2 powder and Ni powder, then add nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O), the quality of nickel nitrate hexahydrate is TiH 2 5% to 10% of the total mass of Ni powder and Ni powder, add absolute ethanol to make the solution concentration of nickel nitrate hexahydrate to 0.1mol / L, stir mechanically for 30 minutes, then heat and mechanically stir until the absolute ethanol is completely volatilized to obtain TiH 2 -Ni composite powder;

[0019] Two, the TiH obtained in step one 2 -Ni composite powder is evenly spread in the quartz boat, put the quartz boat into the plasma-enhanced chemical vapor deposition equipment, evacuate to below 5Pa, pass H 2 As a reducing gas, H 2 The flow rate is 20sccm...

specific Embodiment approach 2

[0022] Specific embodiment two: this embodiment is different from specific embodiment one: the quality of nickel nitrate hexahydrate in step 1 is TiH 2 The total mass of Ni powder and Ni powder is 7.5%. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0023]Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the working temperature in step 2 is 510-560°C. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method for preparing in-situ growed carbon nano tube reinforcing TiNi high-temperature solders, belonging to the field of solder preparation. According to the method, the homogeneous dispersion and structural integrity of carbon nano tubes in composite solders are realized, the mutual reaction of titanium and carbon is avoided, and therefore the problems of large thermal stress and poor high temperature mechanical properties of joints existing in the traditional TiNi solders during soldering connection with ceramics, composite materials and metal are solved. The method comprises the following steps of: 1, mixing TiH2 powder with Ni powder, adding nickel nitrate hexahydrate and ethanol, mechanically stirring, and heating the ethanol to volatilize; and 2 and then laying the mixture in a quartz boat, cooling to a room temperature after vapor phase deposition, and obtaining the carbon nano tube reinforcing TiNi high-temperature solders. The carbon nano tubes / the carbon nano tubes in the TiNi composite solders are homogeneously dispersed on a composite solder matrix, the length can reach 1-5 Mum, the tube diameter is 10-15nm, and the content of the carbon nano tubes in the composite solders is about 1.5-5 percent. The method is suitable for the field of spacelight.

Description

technical field [0001] The invention belongs to the field of brazing filler metal preparation; in particular, it relates to a preparation method of in-situ grown carbon nanotube reinforced TiNi high-temperature brazing filler metal. Background technique [0002] Ceramics and composite materials have light weight, high hardness, excellent high temperature resistance and high temperature corrosion resistance, and good chemical stability, and have broad application prospects in aviation, aerospace, automotive and other fields. However, ceramics and composite materials have low plasticity and poor formability, making it difficult to use them alone. In practical applications, connection technology is often used to make ceramics, composite materials and metal composite components, which have broad application prospects in power electronics, aerospace, energy transportation and other fields. Especially in the field of aerospace, composite components are required to serve in extrem...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/05B22F9/20B22F1/02B23K35/32
Inventor 亓钧雷郭志龙张丽霞曹健冯吉才
Owner HARBIN INST OF TECH
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