Preparation method of titanium carbide/titanium diboride composite ceramic particle preform

Abstract

The invention relates to a preparation method of a titanium carbide/titanium diboride composite ceramic particle preform. The preparation method comprises the following steps: firstly, preparing titanium carbide/titanium diboride composite ceramic particles; and then preparing a titanium carbide/titanium diboride composite ceramic particle preform. The titanium carbide/titanium diboride composite ceramic particles can be prepared by a pressure granulation method or a sol-gel granulation method. According to the pressure granulation method, titanium carbide and titanium diboride are utilized to form an eutectic phase with a low sintering temperature, then a small amount of metal sintering aid is added, and pressureless sintering can be carried out at the low sintering temperature to form the titanium carbide/titanium diboride composite ceramic particles. The sol-gel method granulation comprises the following steps: adding water, a water reducing agent and a sodium alginate solution into mixed powder formed by titanium carbide powder, titanium diboride powder and metal powder, carrying out ball milling, curing and carrying out high-temperature sintering. The obtained composite ceramic particles have high hardness and high toughness, and compared with zirconium oxide toughened aluminum oxide ceramic particles, the performance of the metal-based ceramic particle composite material can be further improved.

Description

technical field [0001] The invention relates to the preparation of metal-based wear-resistant materials, and more particularly to a preparation method of a titanium carbide / titanium diboride composite ceramic particle preform. Background technique [0002] In metallurgy, mining, electric power, building materials and other industries, vertical grinding rollers and grinding discs, blow bars, hammer heads and other wear-resistant parts used to crush or grind materials have developed from a single wear-resistant metal material to a high wear-resistant one. metal matrix composites. Due to the large difference in the properties of the reinforcement phase and the metal matrix, the reinforcement phase preform is usually prepared first, and then composited through different casting processes. The preparation of the ceramic preform has a great impact on the production of the final metal matrix composite material. The corresponding ceramic preforms use Different ceramic particles als...

AI Technical Summary

Problems solved by technology

Patent (CN109355521A) discloses a preparation method of titanium diboride-based metal composite materials, by adding titanium-based alloy powder (10-20%) to titanium diboride (80-90%), in an inert atmosphere in Sinter at 1000°C to obtain titanium diboride-based metal composite materials, thereby improving the toughness of the composite material, but it is difficult to form a bond between titanium diboride at a lower sintering temperature