Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-strength low thermal expansion A1N nano wire and A1 composite material

A low thermal expansion, composite material technology, applied in the field of nanomaterials, to achieve the effect of increasing the turn-on voltage, reducing the electric field enhancement effect, and solving the shielding effect

Inactive Publication Date: 2008-09-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of aerospace, integrated circuit and automobile manufacturing industries, traditional simple, single, multi-phase or conventional composite aluminum matrix and aluminum nitride materials can no longer meet the requirements

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
  • High-strength low thermal expansion A1N nano wire and A1 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The yield strength and tensile strength of the composite without AlN nanowires are about 60MPa and 131MPa, respectively. The thermal expansion test in the range of 20-250C shows that the thermal expansion coefficient is 22.29×10 -6 / K.

Embodiment 2

[0021] The AlN nanowires and Al nanoparticles with a volume composition of 4.5vol% are evenly mixed, and the dried mixed powder is hot-pressed into a block. The yield strength and tensile strength of the composite containing 4.5% AlN nanowires are about 3.2 times and 3.3 times that of the matrix without nanowires, respectively. The thermal expansion test in the range of 20-250C shows that adding AlN nanowires can effectively reduce the thermal expansion coefficient of Al, and the thermal expansion coefficient of the composite material containing 4.5% AlN nanowires is 15.24×10 -6 / K, which is 31.6% lower than that of the matrix without nanowires.

Embodiment 3

[0023] The AlN nanowires and the Al nanoparticles with a volume composition of 10.5vol% are evenly mixed, and the dried mixed powder is hot-pressed into a block. The yield strength and tensile strength of the composite containing 10.5% AlN nanowires are about 3.7 times and 4.2 times that of the matrix without nanowires, respectively. The thermal expansion test in the range of 20-250C shows that adding AlN nanowires can effectively reduce the thermal expansion coefficient of Al, and the thermal expansion coefficient of the composite material containing 10.5% AlN nanowires is 11.75×10 -6 / K, which is 47.3% lower than that of the matrix without nanowires.

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
Tensile strengthaaaaaaaaaa
Thermal expansion coefficientaaaaaaaaaa
Thermal expansion coefficientaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a high-strength low-thermal-expansion AlN nano-wire and an Al composite material. On the basis of AlN nano-wire with a purity of more than 95%, a high-density AlN nano-wire / Al composite material is prepared by melting point hotpressing method, Al nano-grains are prepared by H2 by arc discharge method; with Al, AlCl3, Al2O3 and NH3 as the reactants, AlN nano-fiber at gram level is deposited on a quartz substrate by gas phase CVD method, which is a monocrystalline AlN nano-wire with a purity of 95%, the diameter is between 10nm and 50nm, 1-15% by volume of AlN nano-wire and Al nano-grains are uniformly mixed, the dried mixing powder is hotpressed into a block. AlN nano-wire is evenly dispersed in a matrix, the interface is well bonded, AlN nano-wire is an idea intensifier for optimizing the force property and thermophysical property of metal-matrix electronic composite material, the AlN nano-wire and Al composite material are hopeful to be high-strength low-thermal-expansion new electronic packaging material.

Description

technical field [0001] The invention relates to the field of nanometer materials, and in particular provides an AlN nanowire and Al composite material with high strength and low thermal expansion. Background technique [0002] Aluminum-based materials have become widely used structural and functional materials because of their high specific strength, specific stiffness and corrosion resistance; aluminum nitride (AlN) materials have high strength, high temperature resistance, corrosion resistance, and high thermal conductivity. It is an ideal reinforcement material, electronic component substrate and packaging material [1] . With the rapid development of aerospace, integrated circuit and automobile manufacturing industries, the traditional simple, single, multi-phase or conventional composite aluminum matrix and aluminum nitride materials can no longer meet the requirements. Contents of the invention [0003] The purpose of the present invention is to provide a high-stren...

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): C22C49/00C22C49/06C22C49/14C22C47/14C22C101/08
Inventor 丛洪涛唐永炳成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com