A kind of preparation method of in-situ growth carbon nanotube reinforced aluminum-based solder

A carbon nanotube, reinforced aluminum-based technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve problems such as large thermal stress and poor mechanical properties of joints, and achieve thermal stress relief, good toughness, and high elastic modulus. The effect of volume and tensile strength

Active Publication Date: 2015-10-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims to solve the problems of large thermal stress and poor mechanical properties of the joints existing in the traditional aluminum-based solder when brazing and connecting aluminum-based composite components, and provides a preparation of in-situ grown carbon nanotube-reinforced aluminum-based solder method

Method used

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  • A kind of preparation method of in-situ growth carbon nanotube reinforced aluminum-based solder
  • A kind of preparation method of in-situ growth carbon nanotube reinforced aluminum-based solder

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specific Embodiment approach 1

[0019] Specific Embodiment 1: In this embodiment, an in-situ grown carbon nanotube reinforced aluminum-based solder is prepared from nickel nitrate hexahydrate and aluminum-based composite powder, wherein the mass percentage of nickel nitrate hexahydrate and aluminum-based composite powder is 2%. ~10%, the aluminum-based composite powder is Al-Si-based, Al-Si-Cu-based or Al-Cu-Ag-based aluminum-based solder powder with a purity of over 99%.

specific Embodiment approach 2

[0020] Specific embodiment two: the method for preparing a kind of in-situ growth carbon nanotube reinforced aluminum-based solder described in specific embodiment one, specifically prepared according to the following steps:

[0021] 1. Mix aluminum-based composite powder and nickel nitrate hexahydrate, then add ethanol to obtain nickel nitrate hexahydrate solution with a concentration of 0.1-0.2mol / L, then mechanically stir for 20-40 minutes, then heat and mechanically stir until ethanol solution All volatilize to get Ni(NO 3 ) 2 / Aluminum-based composite powder, wherein the mass percentage of nickel nitrate hexahydrate and aluminum-based composite powder is 2% to 10%, and the aluminum-based composite powder is Al-Si, Al-Si-Cu or Al-Cu-Ag Aluminum-based solder powder with a purity of more than 99%;

[0022] Two, the Ni(NO) obtained in step one 3 ) 2 / Al-based composite powder is evenly spread in the quartz boat, and then the quartz boat is put into the plasma-enhanced ch...

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment is different from Embodiment 2 in that: in step 2, the temperature is raised to 410-540°C. Others are the same as in the second embodiment.

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Abstract

The invention relates to an in-situ grown carbon-nanotube-reinforced aluminum-base solder and a preparation method thereof. The invention relates to the solder and the preparation method thereof and solves the problems of large thermal stress and poor mechanical properties of joints when the traditional aluminum-base solder is in brazed connection with aluminum-base composite structures. The in-situ grown carbon-nanotube-reinforced aluminum-base solder is prepared from hexahydrated nickel nitrate and aluminum-base composite powder. The method comprises the following steps: 1, preparing Ni (NO3)2 / aluminum-base composite powder; and 2, in-situ depositing carbon nanotubes. The aluminum-base composite solder is reinforced by the carbon nanotubes, so that the mechanical and thermal properties can be effectively improved. The method is used for preparing the in-situ grown carbon-nanotube-reinforced aluminum-base solder.

Description

technical field [0001] The invention relates to a preparation method of solder. Background technique [0002] Aluminum-based composite materials have the characteristics of high specific strength, high specific modulus, high fatigue resistance, good wear resistance and low density. performance, service life and instrument accuracy, and has broad application prospects in aerospace, automobile manufacturing, electronics and electrical fields. However, aluminum matrix composites have low plasticity and poor formability, making them difficult to use alone. In practical applications, aluminum matrix composite components are often made by joining technology. Due to the low melting point of the matrix phase of the aluminum matrix composite material, it is easy to soften at high temperature, etc., which determines that the connection of the composite components needs to be carried out at a relatively low temperature. Therefore, how to realize the high-strength and high-reliability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/00C22C49/06C22C49/14B23K35/28C22C101/10
Inventor 亓钧雷张大磊张丽霞曹健冯吉才
Owner HARBIN INST OF TECH
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