Method for synthesizing blocky magnesium-based nano composite material by self-organized reaction

A technology of nanocomposite materials and eutectic structure, applied in the direction of nanotechnology, can solve the problems of uneven distribution of reinforcement phase, increase of process complexity and cost, difficulty in microstructure control, etc., achieve high interface connection strength and save energy , the effect of uniform distribution
CN102199714AInactive Publication Date: 2011-09-28HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2011-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for synthesizing a blocky magnesium-based nano composite material by a self-organized reaction, which comprises the following steps: (1) uniformly mixing Mg metal powder and 20 to 30 mass percent of metal oxide powder, wherein the metal oxide is the oxide of a metal having lower reducibility than magnesium; (2) forming the mixture in a mold by cold pressing, wherein the forming pressure is 400 to 600MPa; (3) sintering, wherein the temperature is constantly kept between 450 to 630 DEG C during sintering, and a flowing inert gas (such as argon and mixed gase of CO2 and SF6) is used for protection in a sintering process to prevent magnesium from being oxidized; and (4) at the end of thermal insulation, subjecting a sample to furnace cooling or quenching to obtain different intermetallic compound nano eutectic structures. In the invention, the process and equipment are simple, energy is saved, the reinforcing phase is uniformly distributed, the bonding with interface of a substrate material is firm, and cleanness and environment friendliness are guaranteed. The final hardness of the material is improved greatly, the magnetic nano particles synthesized in situ have excellent soft magnetic property, and the nano lines or nano particles formed by the reaction have high sterilizing performance.
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Description

technical field

[0001] The invention belongs to a novel preparation method of a magnesium-based nanocomposite material. It specifically relates to a method for synthesizing one-dimensional magnesium oxide nanowires or nanoeutectics in a magnesium matrix by using in-situ chemical reaction and self-organized phase transition. The method is especially suitable for preparing magnesium-based nanocomposites with excellent mechanical properties, physical properties such as electromagnetic properties and biological sterilization function. Background technique

[0002] Magnesium-based composites have low density, high specific strength and specific stiffness, good dimensional stability, low-temperature superplasticity, good wear resistance, excellent damping and shock absorption and electromagnetic shielding performance, and their comprehensive performance is better than that of aluminum-based composites. Composite materials, and easy to recycle and reuse, have extremely broad appli...

Claims

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