Aluminium nitride-based multi-element nano-composite ceramic die material and preparation method thereof

Abstract

The invention discloses an aluminium nitride-based multi-element nano-composite ceramic die material and a preparation method thereof. The material comprises the following raw materials in parts by weight: 60-80 parts of aluminium nitride, 10-20 parts of aluminium carbide, 15-25 parts of silicon boride, 2-6 parts of scandium oxide, 4-8 parts of neodymium oxide, 2-4 parts of chromium, 1-3 parts of tungsten and 1-3 parts of nickel, wherein nanoscale powder of all the materials is adopted; the grain size of aluminium nitride is 10-100 nanometers; the grain sizes of aluminium carbide and silicon boride are 1-10 nanometers; the grain sizes of the other raw materials are 1-100 nanometers. The preparation method is characterized by using aluminium nitride as the matrix, adding aluminium carbide and silicon boride as reinforcing phases, scandium oxide and neodymium oxide as stabilizing agents and chromium, tungsten and nickel as sintering aids and carrying out hot pressed sintering on the materials, thus preparing the material. A 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 an aluminum nitride-based multi-element nanocomposite ceramic mold material and a preparation method thereof. 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 tool materials in the future. [0...

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.