Self-generated ceramic particles reinforced with fly ash reinforced fe-al-cr-ni matrix composite material and preparation method

Abstract

The invention belongs to the field of material processing and preparation and particularly relates to a fly-ash-doped authigenic ceramic particle reinforced Fe-Al-Cr-Ni-based composite material and a preparation method. The fly-ash-doped authigenic ceramic particle reinforced Fe-Al-Cr-Ni-based composite material disclosed by the invention is doped with fly ash of which the weight accounts for 1 to 4.8 weight percent of the composite material and comprises the balance of Fe, Cr, Al and Ni, wherein according to the weight ratio, the ratio of Fe to Cr to Al to Ni is 90:10:(70 to 80):(20 to 30). The preparation method of the fly-ash-doped authigenic ceramic particle reinforced Fe-Al-Cr-Ni-based composite material comprises the following steps: firstly, mixing powder according to a certain proportion and carrying out ball milling; then adopting a CO2 laser to emit a high-energy laser beam to ignite the surface of a compact so as to cause self-propagation sintering of the compact and generate the fly-ash-doped Fe-Al-Cr-Ni-based authigenic ceramic particle reinforced composite material. According to the invention, the fly ash is used as a raw material of the composite material, and thus, the fly-ash-doped authigenic ceramic particle reinforced Fe-Al-Cr-Ni-based composite material not only solves the pollution problem and greatly reduces production cost, but also has the advantages of high production efficiency, high purity of a product and very short process.

Description

technical field [0001] The invention belongs to the field of material processing and preparation, and in particular relates to a self-generated ceramic particle-reinforced Fe-Al-Cr-Ni-based composite material doped with fly ash and a preparation method thereof. Background technique [0002] Fe-Cr-Ni intermetallic compounds have many excellent properties such as corrosion resistance, high temperature strength and oxidation resistance, and do not contain precious elements, and the cost is low. Broad application prospects. Since the metal blanks obtained by laser combustion synthesis of metal powder often have low hardness and wear resistance, they cannot directly meet the actual production needs. Therefore, certain alloying elements are added when mixing the powder, and the reinforcement phase is formed in situ inside the base material through combustion synthesis. Together with the matrix to form a composite material, the synthesis of high hardness and high wear resistance a...

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Problems solved by technology

[0005] However, in many cases, it is necessary to add Al 2 o 3 , SiO 2 and other hard phases to strengthen, while the traditional process of producing Al 2 o 3 and SiO 2 , usually must be synthesized to prepare hard phase alloys-prepared into powder-sieving-mixing and other processes, the production cost is high and the process is lengthy, and if the natural mineral waste fly ash is used as the source of hard particles, it will be greatly Low increase the preparation process cycle of composite materials and reduce costs, not only to improve new ways for the preparation of composite materials, but also have positive social and economic benefits for the effective use of coal mine waste and environmental protection

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