Aluminum oxide-titanium carbon oxygen solid solution composite ceramic material and preparation method thereof

Abstract

The invention relates to the technical field of ceramic material science, and in particular relates to an aluminum oxide-titanium carbon oxygen solid solution composite ceramic material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: mixing TiC powder and TiO2 / TiO powder according to a molar ratio, carrying out ball millingfor 3 hours in a high-energy ball mill, drying powder subjected to ball milling, carrying out pressing forming, then placing the formed material in a high-temperature furnace for treatment under theprotection of argon, and then carrying out cooling to room temperature; carrying out crushing and ball-milling on the sintered block to obtain TiC<x>O<1-x> powder, then mixing aluminum oxide with theTiC<x>O<1-x> powder and a proper sintering aid, and mixing the raw materials for 5-20 hours through a physical and mechanical method; and drying the mixed powder, putting the mixed powder into a graphite mould for cold press molding, carrying out sintering in a discharge plasma sintering furnace, and then carrying out cooling to room temperature along with the furnace to prepare the Al<2>O<3>-TiC<x>O<1-x> composite ceramic.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to an alumina-titanium carbon-oxygen solid solution composite ceramic material and a preparation method thereof. Background technique [0002] Composite ceramic materials have the advantages of high melting point, good wear resistance, thermochemical stability, high hardness, etc., and are suitable for making tools for processing difficult-to-machine materials. With the rapid and sustainable development of my country's aerospace, national defense, industry and other fields, the requirements for the comprehensive performance of materials are getting higher and higher. Since composite ceramics can further enhance the toughness of pure alumina ceramics without reducing the hardness and high temperature performance of alumina ceramics, it has received extensive attention. Titanium carbide has excellent properties such as high melting point, anti-oxidation, high strength, good...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: the method of adding ceramic sintering aids in the prior art generally adopts the method of ball milling and mixing with the main phase material, but this method is prone to uneven mixing, and an alumina-titanium carbon Oxygen solid solution composite ceramic material and its preparation method, in order to realize the uniform dispersion of sintering aid in the main phase powder, and use titanium carbide-titanium dioxide (titanium monoxide) to form a solid solution at high temperature to form a reinforcing phase-sintering aid Solid solution, using Ti-C-O solid solution as a reinforcing phase and sintering aid at the same time, improving the sintering of alumina powder at a lower temperature and the uniformity of powder sintering, thereby preparing high hardness and high toughness alumina-titanium oxycarbide composite ceramics

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