Method for improving strength and plasticity of whisker reinforced pure aluminium-based composite material

A composite material and whisker technology, which is applied in the field of improving the strength and plasticity of pure aluminum-based composite materials, can solve the problems of low elongation of pure aluminum-based composite materials, and achieve the effects of increased elongation, yield strength and tensile strength

Inactive Publication Date: 2010-06-09
HARBIN INST OF TECH
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low elongation of the whisker reinforced pure aluminum matrix compo

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving strength and plasticity of whisker reinforced pure aluminium-based composite material
  • Method for improving strength and plasticity of whisker reinforced pure aluminium-based composite material
  • Method for improving strength and plasticity of whisker reinforced pure aluminium-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0009] Specific embodiment 1: The method for improving the strength and plasticity of the whisker-reinforced pure aluminum-based composite material in this embodiment is carried out through the following steps: 1. According to the volume fraction of whiskers and carbon nanotubes in the preform and the height of the preform , According to m=0.25×10 -2 ×π×D 2 ×H×V f ×ρ Weigh aluminum borate whiskers with a diameter of 0.1 to 1 μm and carbon nanotubes with a diameter of 10 to 30 nm, where m is the weight of the whiskers or carbon nanotubes to be weighed, and the unit of m: g, D Is the diameter of the prefabricated block, the unit of D: cm, H is the height of the prefabricated block, the unit of H: cm, V f Is the volume percentage of whiskers or carbon nanotubes in the preform, ρ is the density of whiskers or carbon nanotubes, and the unit of ρ: g / cm 3 , The whiskers are silicon carbide whiskers or aluminum borate whiskers; 2. The carbon nanotubes weighed in step 1 are purified, and ...

Example Embodiment

[0010] Specific embodiment two: this embodiment is different from specific embodiment one in that the volume fraction of carbon nanotubes in the preformed block described in step one is 0.2-0.6%, and the volume fraction of whiskers in the preformed block is 18-25 %. The other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0011] Specific embodiment three: This embodiment is different from specific embodiment one in that the volume fraction of carbon nanotubes in the preform block described in step one is 0.3~0.%, and the volume fraction of whiskers in the preform block is 20~ twenty three%. The other steps and parameters are the same as in the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for improving the strength and the plasticity of a whisker reinforced pure aluminium-based composite material, which relates to a method for improving the strength and the plasticity of a reinforced pure aluminium-based composite material. The invention solves the problem of low elongation rate of the whisker reinforced pure aluminium-based composite material. The method comprises the following steps of: weighing aluminium borate whiskers and carbon nanotubes, purifying the carbon nanotubes to prepare a carbon nanotube suspension, then manufacturing a precast block, drying, then sintering, casting pure aluminium, secondarily pressurizing and then cooling along with a furnace. Al/ABOw and Al/MWNTs interfaces in a reinforced whisker and carbon nanotube simultaneously reinforced composite material prepared by the method are straight, no interface reaction product is found, and the preparation process has no remarkable damage to the whiskers or the carbon nanotubes. The elongation rate of the composite material prepared by using the method can reach more than 3.69 percent and be markedly improved than an aluminium borate whisker reinforced pure aluminium composite material, and the elastic modulus, the yield strength and the tensile strength are further improved.

Description

technical field [0001] The invention relates to a method for improving the strength and plasticity of pure aluminum-based composite materials. Background technique [0002] Compared with aluminum, whiskers (silicon carbide whiskers, aluminum borate whiskers, etc.) reinforced aluminum matrix composites have high specific strength, specific stiffness, wear resistance, low thermal expansion coefficient, and are used in aviation, aerospace, electronics and Industries such as machinery have application potential. However, after whiskers are added to aluminum, the plasticity and toughness of aluminum are reduced, which easily leads to brittle fracture. Taking aluminum borate whiskers reinforced pure aluminum matrix composites as an example, since the overlapping aluminum borate whiskers split the continuous matrix aluminum alloy, and the interface bonding strength between the whiskers and the matrix is ​​low, under force Cracks first initiate at the whisker overlap and the whisk...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C47/06C22C101/04C22C101/10
Inventor 张学习耿林王德尊
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap