High-tenacity polycrystalline composite material, high-tenacity polycrystalline blade and preparation method of high-tenacity polycrystalline blade

Abstract

The invention provides a high-tenacity polycrystalline composite material. The high-tenacity polycrystalline composite material particularly comprises, by mass, 72%-92% of polycrystalline super-hard phase, 7.5%-25% of binding agents and 0.5%-15% of toughening agents. The toughening agents are one of aluminum oxide whiskers, silicon nitride whiskers, silicon carbide whiskers, carbon nano tubes and graphene or the combination of several of the aluminum oxide whiskers, the silicon nitride whiskers, the silicon carbide whiskers, the carbon nano tubes and the graphene. The invention further provides a high-tenacity polycrystalline blade prepared from the high-tenacity polycrystalline composite material and a preparation method of the high-tenacity polycrystalline blade. The preparation method comprises the steps of isostatic forming, vacuum heat treatment activation, and high-temperature and high-pressure sintering. The high-tenacity polycrystalline blade has good tenacity and cutting performance, and the preparation technique is simple and easy to implement.

Description

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AI Technical Summary

Benefits of technology

This patented technology involves creation of strong but brittle ceramics by combining different types of grains together into one structure called polycristobalite (PCA). These particles help crack open up more effectively without being cut off during manufacturing processes. Additionally, adding certain substances such as silicon carbide powder helps increase flexibility while maintaining strength. Overall, this new type of composition provides better performance than existing composites due to its special properties and ease of processing compared to previous methods.

Problems solved by technology

This patented describes different ways to make ceramics stronger by adding tiny crystal grains called silicon carbide (SiC). These small particles help break up larger rocks more easily when they hit them compared to traditional abrasives like alumina. They provide better performance than regular tools made from these types of composites due to increased rigidity, reduced wearing power, longer lifetimes without requiring frequent replacements. However, current techniques require complex processes involving multiple layers of metal oxides, leading to decreased overall effectiveness overtime. Therefore there has developed a novel approach towards achieving this goal.

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