A composite reinforced zirconium boride-based multi-element nano-composite ceramic mold of alumina, titanium carbide and silicon nitride

Abstract

The invention discloses an aluminium oxide, titanium carbide and silicon nitride composite reinforced zirconium boride-based multi-element nano-composite ceramic die. The die comprises the following raw materials in parts by weight: 60-80 parts of zirconium boride, 10-20 parts of aluminium oxide, 10-20 parts of titanium carbide, 15-25 parts of silicon nitride, 2-6 parts of yttrium oxide, 4-8 parts of hafnium boride, 2-4 parts of chromium, 1-3 parts of cobalt and 1-3 parts of manganese, wherein nanoscale powder of all the raw materials is adopted; the grain size of zirconium boride is 10-100 nanometers; the grain sizes of aluminium oxide, titanium carbide and silicon nitride are 1-10 nanometers; the grain sizes of the other raw materials are 1-100 nanometers. A preparation method is characterized by using zirconium boride as the matrix, adding aluminium oxide, titanium carbide and silicon nitride as reinforcing phases, yttrium oxide and hafnium oxide as stabilizing agents and chromium, cobalt and manganese as sintering aids and carrying out hot pressed sintering on the materials, thus preparing the die. The die has strong ageing and defect resistance, good comprehensive mechanical properties and excellent antifriction and wear resistance properties.

Description

technical field [0001] The invention relates to a ceramic mold material, in particular to a composite reinforced zirconium boride-based multi-element nano-composite ceramic mold of aluminum oxide, titanium carbide and silicon nitride. Background technique [0002] Ceramic cutting tools have high hardness and wear resistance, and exhibit excellent cutting performance in high-speed cutting and dry cutting, and are a class of cutting tool materials with great development prospects. However, most of the currently used ceramic tool materials are limited to micro-composite ceramics, and the mechanical properties of the materials, especially the strength and toughness, still need to be further improved. According to the Hall-petch relationship: the smaller the grain size, the higher the strength of the ceramic material. Therefore, the research and development of nano-modified and nano-micro composite ceramic tool materials will be one of the main directions for the development of ...

AI Technical Summary

Problems solved by technology

[0005] From the existing research, it can be seen that the performance and price advantages of nanocomposites, especially nanocomposite ceramics, have not been fully utilized in the field of molds.