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

A kind of in-situ self-generated aluminum-silicon gradient composite material and preparation method thereof

A composite material, in-situ self-generating technology, applied in the direction of semiconductor/solid-state device components, electric solid-state devices, semiconductor devices, etc. Processed molding, low density effect

Active Publication Date: 2021-09-24
XIANGTAN UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the failure rate of electronic devices increases sharply with the increase of operating temperature: basically every 10% increase in operating temperature o C, the lifetime of gallium arsenide or silicon semiconductor devices will drop by one-third

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
  • A kind of in-situ self-generated aluminum-silicon gradient composite material and preparation method thereof
  • A kind of in-situ self-generated aluminum-silicon gradient composite material and preparation method thereof
  • A kind of in-situ self-generated aluminum-silicon gradient composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Place the high-purity silica quartz glass vessel with the same workpiece shape in a heating furnace and heat it to 800 o C preheating and heat preservation;

[0039] (2) will be 800 o C pure aluminum liquid is poured into step (1) in the high-purity silica quartz glass vessel, leaves standstill at 800 o C insulation;

[0040] (3) Control the holding time of step (2) for 2 hours to ensure that the aluminum liquid and silicon dioxide react, the silicon atoms diffuse into the aluminum liquid, and finally cool with the furnace;

[0041] (4) Removing the residual quartz glass on the surface of the material in step (3) to obtain an in-situ self-generated aluminum-silicon gradient composite material consistent with the shape of the quartz glass vessel.

[0042] (5) Macro organization see figure 2 , massive primary silicon is distributed in the outer ring; the mosaic diagram of the microstructure from outside to inside image 3 , it can be clearly seen that the layere...

Embodiment 2

[0044] (1) Place the high-purity silica quartz glass vessel with the same workpiece shape in a heating furnace and heat it to 800 o C preheating and heat preservation;

[0045] (2) Melt high-purity aluminum in a high-purity aluminum oxide ceramic crucible, and add 3wt.% lanthanum to the aluminum liquid.

[0046] (3) Step (2) molten aluminum is heated to 800 o C is poured into step (1) in the high-purity silica quartz glass vessel, leaves standstill at 800 o C insulation;

[0047] (4) Control the holding time of step (3) for 2 hours to ensure that the aluminum liquid and silicon dioxide react, and the silicon atoms diffuse into the aluminum liquid, and finally cool with the furnace;

[0048] (5) Removing the residual quartz glass on the surface of the material in step (4) to obtain an in-situ self-generated aluminum-silicon gradient composite material consistent with the shape of the quartz glass vessel.

[0049] (6) See macro organization chart Figure 5 (The white spots ...

Embodiment 3

[0051] (1) Place the high-purity silica quartz glass vessel with the same workpiece shape in a heating furnace and heat it to 800 o C preheating and heat preservation;

[0052] (2) Melt high-purity aluminum in a high-purity aluminum oxide ceramic crucible, and add 1.00wt.% cerium to the aluminum liquid.

[0053] (3) Step (2) molten aluminum is heated to 800 o C is poured into step (1) in the high-purity silica quartz glass vessel, leaves standstill at 800 o C insulation;

[0054] (4) Control the holding time of step (3) for 2 hours to ensure that the aluminum liquid and silicon dioxide react, and the silicon atoms diffuse into the aluminum liquid, and finally cool with the furnace;

[0055] (5) Removing the residual quartz glass on the surface of the material in step (4) to obtain an in-situ self-generated aluminum-silicon gradient composite material consistent with the shape of the quartz glass vessel.

[0056] (6) See macro organization chart Figure 7 (The white spots ...

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
densityaaaaaaaaaa
microhardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an in-situ self-generated aluminum-silicon gradient composite material and a preparation method thereof. The in-situ self-generated aluminum-silicon gradient composite material of the present invention is: the silicon content gradually decreases from the surface to the core, and the outer hypereutectic high-silicon tissue layer gradually transitions to the inner eutectic aluminum-silicon tissue layer or the outer layer Transition from the eutectic high silicon structure layer to the eutectic Al-Si structure layer and then to the hypoeutectic Al-Si structure layer or from the outer hypereutectic high-silicon structure layer to the eutectic Al-Si structure layer and then to the hypoeutectic structure layer The final core of the crystalline aluminum-silicon tissue layer is a gradient composite material with a pure aluminum layer. The material has a smooth transition between each tissue layer and has no obvious interface. Aiming at the problems of bulk primary silicon and acicular eutectic silicon in the aluminum-silicon gradient composite material. In the present invention, lanthanum or cerium modifier is firstly added to pure aluminum liquid, and then reacted with silicon dioxide to obtain an aluminum-silicon gradient composite material, thereby improving the morphology of primary silicon and eutectic silicon, and finally obtaining a round-headed short rod shape or a round-headed granular shape Primary silicon and eutectic silicon.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing an in-situ self-generated aluminum-silicon gradient composite material. Background technique [0002] High-silicon aluminum alloy has high high-temperature strength, good thermal stability and high wear resistance, and is an ideal wear-resistant material. It has been widely used in the fields of automobiles, motorcycles, and military industries, such as wear-resistant parts such as pistons, cylinder liners, and brake discs of tanks, motorcycles, and automobiles. The use of aluminum alloy engines has become an important direction to fully replace cast iron engines and cast iron cylinder liner engines. However, due to the large difference in microhardness between primary silicon (microhardness value of HV1000-1300) and matrix aluminum (microhardness value of cast aluminum is HV60-100), the hard The primary silicon particles are extruded with the...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/03H01L23/29
CPCC22C1/026C22C1/03C22C21/04H01L23/29
Inventor 李发国施东明胡孝愿
Owner XIANGTAN UNIV
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