High-strength silicon carbide crystal whisker reinforcing ceramic and preparation method thereof

Abstract

The invention discloses a high-strength silicon carbide crystal whisker reinforcing ceramic material which comprises the following raw materials in parts by weight: 9-12 parts of calcite, 4-5 parts of magnesium oxide, 7-9 parts of quartz, 65-70 parts of zirconium oxide, 18-25 parts of silicon nitride, 5-7 parts of nano-zinc oxide, 20-30 parts of silicon carbide crystal whisker, 4-6 parts of lithium chinastone 1-2 parts of sodium carbonate, 0.6-0.9 part of polyvinylpyrrolidone, 1-1.5 parts of polyacrylic acid, 1.2-1.6 parts of polyethylene glycol and 4-5 parts of an antiwear aid. The silicon carbide crystal whisker and the nano-zinc oxide are added to ceramic, so that the ceramic has higher hardness, better tenacity, conductivity, antiwear performance, and high temperature resistance; when the ceramic is used for manufacturing a cutter, the cutter is excellent in heat resistance and long in service life and can smoothly cut a workpiece; with adoption of the antiwear aid, the antiwear performance and the heat resistance of the ceramic can be improved.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a high-strength silicon carbide whisker-reinforced ceramic and a preparation method thereof. technical background [0002] With the development of the new technological revolution, it is required to continuously improve cutting productivity and reduce production costs, especially the development of CNC machine tools, which requires the development of new cutting tools with higher cutting speed and more wear resistance than cemented carbide tools. A variety of high-strength, high-hardness, corrosion-resistant, wear-resistant and high-temperature resistant new materials that are difficult to cut are increasing day by day. According to literature estimates, such materials have accounted for more than 50% of the total number of international processing, and cemented carbide tools are difficult to process many of these new materials. On the other hand, the output of cemented carbide ...

AI Technical Summary

Problems solved by technology

[0003] At present, zirconia ceramics, alumina, aluminum nitride and other ceramics are the most widely used ceramic tools, which have high hardness, high density, high temperature resistance, anti-magnetization, anti-oxidation, strong corrosion resistance, good chemical stability, and high wear resistance. Good and other characteristics, but the cost of these ceramics is high, and new materials need to be further studied to reduce costs, and to improve ceramic toughness, heat dissipation, thermal shock resistance, wear resistance and other properties to adapt to continuously developing technical requirements