A composite coated boron nitride-based multi-element nano-composite ceramic tooling and mold material and its preparation method

Abstract

The invention discloses a compound clad boron nitride based multiple unit nanometer compound ceramics tool and mold material and a preparation method thereof. The material comprises the following raw materials in parts by weight: 60-80 parts of boron nitride, 10-20 parts of aluminium nitride, 15-25 parts of titanium boride, 2-6 parts of praseodymium oxide, 4-8 parts of neodymium oxide, 2-4 parts of molybdenum, and 1-3 parts of cobalt; all the above raw materials are nanometer powder; the particle size of boron nitride is 10-100 nanometer, the particle size of aluminium nitride and titanium boride is 1-10 nanometer, the particle size of other materials is 1-100 nanometer; the preparation method is that the boron nitride is used as a base body; aluminium nitride and titanium boride are added as strengthening phase; praseodymium oxide and neodymium oxide are used as stabilizing agent; molybdenum and cobalt are used as sintering assistant; the mixture are subjected to microwave assisted ball milling, sol gel clad, and hot pressing sintering. The mould has strong ageing resistance and defect resistance, and has good comprehensive mechanical property and good antifriction.

Description

technical field [0001] The invention relates to a ceramic tooling and mold material, in particular to a compound-coated boron nitride-based multi-element nano-composite ceramic tooling and 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 o...

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.