无压烧结SiC陶瓷研究进展

高硬度、高强度、耐腐蚀、耐磨损和高弹性模量等特性使SiC陶瓷成为航空航天、电力电子和机械工业等领域不可或缺的材料。然而SiC陶瓷超高的合成温度和难以烧结致密的特性限制了它的生产。近年来随着SiC陶瓷烧结机理的深入研究及添加剂的多样化,采用无压烧结工艺制备高性能SiC陶瓷材料已逐渐成为最常用的方法。本文主要阐述了近年来无压烧结SiC工艺添加剂的研究进展,综述了添加剂及其用量、烧结温度和时间对无压烧结SiC陶瓷性能的影响。

Research progress of pressureless sintered SiC ceramics

Properties such as high hardness,high intensity,corrosion resistance,abrasion resistance and high elastic modulus have made SiC ceramics become the indispensable material for aerospace,power electronics and mechanical industry.However,disadvantages such as high synthesis temperature and low sinterability,have limited the fabrication of these ceramics.In recent years,with the deep research of SiC ceramics’ sintering mechanism and the diversification of additives,the preparation of high-performance SiC ceramics by pressureless sintering has gradually become the most commonly used method.This paper introduced the research progress of additives in pressureless sintering SiC technology in recent years,and summarized the effects of additives and dosage,sintering temperature and time on the performance of sintering SiC ceramics.