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In-situ submicron/nanometer particle-reinforced magnesium-matrix composite material and preparation method thereof

A composite material and particle-reinforced technology, which is applied in the field of high-strength creep-resistant in-situ submicron/nano TiB2 particle-reinforced magnesium-based composite materials, can solve problems such as limited impact effects, achieve low cost, clean and pollution-free interface, and increase yield. Yield effect

Active Publication Date: 2011-05-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Single application of mechanical stirring or high-energy ultrasound has limited effect on the in-situ melt reaction. This preparation process has certain limitations, and the performance of the prepared composite material needs to be further improved.
[0006] So far, through Mg-TiO 2 -B 2 o 3 Synthesis of submicron / nano TiB by in situ reaction of melt in reaction system 2 The technology of particle-reinforced magnesium-based composites has not been reported. Therefore, this patented technology invented Mg-TiO 2 -B 2 o 3 Synthesized a new system and developed a melt direct reaction method + mechanical stirring + high-energy ultrasonic technology to prepare a high-strength creep-resistant in-situ submicron / nano TiB 2 A New Material of Particle Reinforced Magnesium Matrix Composite

Method used

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  • In-situ submicron/nanometer particle-reinforced magnesium-matrix composite material and preparation method thereof
  • In-situ submicron/nanometer particle-reinforced magnesium-matrix composite material and preparation method thereof
  • In-situ submicron/nanometer particle-reinforced magnesium-matrix composite material and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0029] Example 1 (comparative example)

[0030] Composite materials prepared by continuous mechanical stirring + high-energy ultrasonic treatment

[0031] TiO 2 and B 2 o 3 The powder is mixed evenly according to the stoichiometric ratio of 1:1.03, preheated at 200°C for 2 hours for use, the AZ91 alloy is heated to 710°C and melted, kept warm for 20 minutes, and the magnesium is stirred with a stirrer with a graphite stirring blade Add the mixed powder and disperse the powder evenly in the melt, the stirring speed is 800rpm, and the stirring time is 18 minutes; after standing for 2 minutes, apply high-energy ultrasonic with a power of 800W to the magnesium alloy melt for After 18 minutes, the magnesium melt was left to stand for 15 minutes, then the slag was removed, refined and casted into a copper mold to form a magnesium-based composite material. figure 2 It can be seen that there are no reinforced particles with round shape in the prepared composite material, most...

example 2

[0033] Composite material A prepared by intermittent mechanical stirring + high-energy ultrasonic treatment

[0034] TiO 2 and B 2 o 3 The powder is mixed evenly according to the stoichiometric ratio of 1:1.03, preheated at 200°C for 2 hours for use, the AZ91 alloy is heated to 710°C and melted, kept warm for 20 minutes, and the magnesium is stirred with a stirrer with a graphite stirring blade Add the mixed powder and disperse the powder evenly in the melt, the stirring speed is 200rpm, and the stirring time is 5 minutes; after standing for 2 minutes, apply high-energy ultrasound with a power of 800W to the magnesium alloy melt for 5 minutes; after standing for 1 minute, mechanically stir the magnesium alloy melt, the stirring speed is 200rpm, and the stirring time is 5 minutes; after repeating the above steps 3 times, after standing for 15 minutes, the magnesium alloy melt is removed and refined Casting is formed in a copper mold, and the micron+submicron particle reinf...

example 3

[0036] Composite material B prepared by intermittent mechanical stirring + high-energy ultrasonic treatment

[0037] TiO 2 and B 2 o 3 The powders were mixed evenly according to the stoichiometric ratio of 1:1.03, and preheated at 200°C for 2 hours before use. Heat the AZ91 alloy to 720°C to melt, and keep it homogenized for 15 minutes. Utilize a stirrer with graphite stirring blades to stir the magnesium melt, add the mixed powder, and make the powder evenly dispersed in the melt, the stirring speed is 1500rpm, the stirring time is 3 minutes, after standing for 2 minutes, the magnesium alloy melting The applied power of the body is 1200W high-energy ultrasound, the action time is 3 minutes, after standing for 1 minute, the magnesium alloy melt is mechanically stirred, the stirring speed is 1500rpm, and the stirring time is 3 minutes. After repeating the above steps 3 times, the After the magnesium melt was left to stand for 10 minutes, the slag was removed, refined and ...

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Abstract

The invention relates to the technical field of preparation of in-situ particle-reinforced magnesium-matrix composite materials, in particular to a novel Mg-TiO2-B2O3 synthesis system and a high-strength creep-resisting in-situ submicron / nanometer TiB2 particle-reinforced magnesium-matrix composite material prepared with a direct melt reaction method, a mechanical stirring mode and a high-intensity ultrasound technology. The preparation method comprises the following technological approaches of: adding dried reactants TiO2 and B2O3 powder into a magnesium alloy melt in a mechanical stirring mode, and alternately applying high-intensity ultrasound and mechanical stirring to prepare the composite material after the reactants are added. The technology has a simple process and is especially applicable to the formation of complex components, a synthesized reinforcement is a high-temperature thermodynamically stable ceramic phase, and produced reinforced particles have fine dimension in the range of submicron / nanometer scale, pollution-free surfaces and a good bonding interface with a matrix.

Description

technical field [0001] The invention relates to the technical field of preparation of in-situ particle reinforced magnesium-based composite materials, in particular to Mg-TiO 2 -B 2 o 3 Synthesis of a new system and a high-strength creep-resistant in-situ submicron / nano TiB prepared by melt direct reaction method + mechanical stirring + high-energy ultrasonic technology 2 Particle-reinforced magnesium-based composites. Background technique [0002] Magnesium-based composites are another competitive light metal-based composite after aluminum-based composites. The main features are low density, high specific strength and specific stiffness, and also have good wear resistance, high temperature resistance, and impact resistance. properties, excellent shock absorption performance, good dimensional stability and casting performance, etc., are becoming the most promising composite material in the field of modern high-tech, in advanced electronic devices, aerospace vehicles, mobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C23/00C22C1/00
Inventor 赵玉涛张松利陈刚王肖英
Owner JIANGSU UNIV
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