先进烧结技术制备高熵陶瓷的研究进展

Overview of Advanced Sintering Technologies for High-entropy Ceramics

高熵陶瓷作为近年来发现的新型材料,因其独特的结构和高熵效应,受到了广泛关注。由于高熵效应中的迟滞扩散效应,高熵陶瓷需要在较高温度下长时间保温才能充分致密,制备周期长、耗费能源大。随着先进烧结技术的发展,一些学者采用闪烧、放电等离子烧结和超快高温烧结等先进技术制备高熵陶瓷,在缩短烧结周期和降低烧结温度方面取得了较多成果。对先进烧结技术制备高熵陶瓷的研究进展进行了分析归纳,探讨了不同烧结技术的原理、特点、优势和发展前景,并对未来高熵陶瓷烧结方法的研究方向进行了展望。

As a newly discovered ceramic material,high-entropy ceramics are highly valued,due to their unique structure and high entropy effects.However,the sluggish diffusion effect makes it difficult to densify high-entropy ceramics by using the conventional sintering technology,which requires several hours or even a dozen hours of heat preservation at high temperature,making the preparation process both time-and energy-consuming.With the development of advanced sintering techniques,such as flash sintering,spark plasma sintering and ultrafast high-temperature sintering,the preparation of high-entropy ceramics could be achieved for short time at low sintering temperature.The research progress of high-entropy ceramics prepared by using various advanced sintering technologies is analyzed and summarized.The principles,characteristics,advantages and development prospects of different sintering techniques are discussed.Also,the research direction of sintering methods for high-entropy ceramics is evaluated.