Microwave combustion synthesizing method for bulk nanocrystalline alloy

Abstract

The invention discloses a microwave combustion synthesis method for a bulk nano-crystalline alloy. According to a target product, one or a mixture of two or three types of powder of metal powder, non-metal powder and metal oxide powder is selected as a raw material, a high energy ball mill is utilized to mix the raw material, the mixed powder is loaded into a steel mold and is pressed on a pressing machine, a well-pressed blank is placed into a crucible, the crucible is placed into a microwave oven to be heated, and a product is cooled to room temperature and then is taken out. The method hasthe advantages of simple process, short time consumption of microwave synthesis process, energy concentration, less energy consumption, no pollution, fully dense product, no pores, and fine and even crystal grains; the final size of the crystal grains can be controlled to 10nm; and the hardness, the strength and the plasticity of the bulk nano-crystalline alloy are greatly improved, and the obtained bulk nano-crystalline alloy also has excellent special physical properties such as light, electricity, sound, magnetism, and so on.

Description

1. Technical field [0001] The invention relates to a preparation method of bulk nano crystal alloy, in particular to a microwave combustion synthesis method of bulk nano crystal alloy. 2. Background technology [0002] Bulk nanocrystalline material mainly refers to a three-dimensional bulk material composed of grains with a grain size in the nanometer scale (5-100nm). Compared with corresponding microcrystalline materials, nanocrystalline metals and alloys have higher hardness and wear resistance, ultra-high yield strength and fracture strength, and good plastic deformation ability at lower temperature and higher strain rate At the same time, it also has special physical properties such as sound, light, electricity, and magnetism, so it has a bright future in engineering applications. At present, the preparation technology of nanomaterials from zero-dimensional scale to two-dimensional scale, that is, nanoparticles, nanowires, nanotubes, and nanofilms, is relatively mature,...

AI Technical Summary

Problems solved by technology

The preparation of nanocrystalline materials by severe plastic deformation is costly, and the obtained grain size range is large, and it is not suitable for metals or alloys with poor plastic denaturation ability, especially intermetallic compounds with severe room temperature brittleness.

The nanomaterials prepared by the deep supercooling method have inhomogeneity in structure, and the thermal stability is not ideal. Generally, the temperature of thermal stability is very narrow.

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