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Intragranular distribution reinforcement composite material powder and preparation and forming methods thereof

A composite material and reinforcement technology, which is applied in the field of preparing carbon nanotube aluminum matrix composite materials by powder metallurgy method, can solve the problems of complicated ball milling process, etc., and achieve the effects of simple and easy operation, low oxygen content and good strong-plastic matching in the preparation process.

Active Publication Date: 2021-09-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ball milling process is extremely complicated, and the ideal intragranular dispersed CNTs / Al powder is the result of the comprehensive optimization design of the ball-material ratio, process control agent content, ball milling time, oxygen content and other factors in the ball milling process.

Method used

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  • Intragranular distribution reinforcement composite material powder and preparation and forming methods thereof
  • Intragranular distribution reinforcement composite material powder and preparation and forming methods thereof
  • Intragranular distribution reinforcement composite material powder and preparation and forming methods thereof

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Embodiment 1

[0078] The preparation method of intragranular dispersed CNTs / Al composite material in this example includes the preparation process and forming process of intragranular dispersed CNTs / Al composite material powder, and at the same time as a comparison group, the CNTs / Al composite material powder with grain boundary distribution is prepared In this example, 1# represents the composite material powder / block in the state of dispersed CNTs in the grain, and 2# represents the composite material powder / block in the state of dispersed CNTs in the grain boundary. The SEM morphology of the powder primary Al powder is as follows figure 1 As shown in (a), TEM morphology of CNTs powder figure 1 as shown in (b),

[0079] The specific intragranular and grain boundary CNTs / Al composite material powder preparation method comprises the following steps:

[0080] Step 101, powder proportioning and processing, the specific flow diagram is as follows figure 2 Shown:

[0081] A total of 120 g ...

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Abstract

The invention discloses intragranular distribution reinforcement composite material powder and preparation and forming methods thereof. The composite material powder comprises metal matrix powder and reinforcements, the metal matrix powder can be deformed into flaky powder through a ball milling process, and the reinforcements are nanometer one-dimensional and two-dimensional reinforcements. The deformation process of metal matrix powder is controlled through a high-energy ball milling method, the deformation state of the powder is judged according to the powder morphology in the ball milling process, and when the powder is in a flaky state, the reinforcements gradually enter crystal grains, so that composite material powder with the reinforcements distributed in the crystal grains is obtained; and taking intracrystalline carbon nanotube reinforced aluminum-based composite material powder as an example, the oxygen content of the prepared intracrystalline dispersed CNTs / Al composite material powder is 0.70%, the intracrystalline dispersed CNTs are uniform and free of obvious agglomeration, the strength of the obtained intracrystalline dispersed CNTs / Al composite material is improved by 5.7% compared with that of a grain boundary dispersed CNTs / Al composite material, and the ductility is improved by 36.4%.

Description

technical field [0001] The invention belongs to the technical field of preparing carbon nanotube aluminum-based composite materials by powder metallurgy, and in particular relates to a composite material powder of intragranular distribution reinforcing body and a preparation and forming method thereof. Background technique [0002] Metal matrix composites have become a new material at home and abroad due to their plasticity, electrical and thermal conductivity, specific strength, and corrosion resistance of the metal matrix, as well as the low density, ultra-high strength and modulus, and excellent electrical and thermal conductivity of the reinforcement. One of the research hotspots. Among them, the powder metallurgy method is one of the important methods for preparing metal matrix composites. The reason is that its forming temperature is lower than the melting point of the material, and it is easy to control the interface bonding state between the reinforcement and the mat...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00B22F3/105B22F3/20B22F5/00C22C21/00
CPCB22F9/04B22F3/105B22F3/20C22C21/00B22F5/00B22F2009/043B22F2003/208Y02P10/25
Inventor 陈彪曹遴万杰李金山寇宏超王军唐斌樊江昆赖敏杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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