冷压烧结CBN/Cu-Sn-Ti复合材料界面层生长机制研究

本项目采用先冷压成型后高温烧结的方法制备CBN/Cu-Sn-Ti复合材料并对其界面层生长机制进行研究。系统探究Cu-Sn-Ti对CBN的润湿性规律，量化不同烧结参数对CBN/Cu-Sn-Ti界面反应层厚度和产物形貌变化规律的影响。利用FIB-TEM对界面反应层微观结构和元素分布进行精确表征。计算界面不同产物的形核能力，研究界面不同产物在气-液-固状态下的纳米晶体生长机制，确定界面产物的生长方向，阐明反应层的形成及生长机制，使界面形成高强度的冶金结合，为制备加工性能优良的CBN/Cu-Sn-Ti复合材料提供坚实的理论依据。目前以第一作者在冶金领域权威期刊Metallurgical and Materials Transactions B等上发表学术论文7篇；授权专利8件；获得中国博士后科学基金第2批特别资助(站前)；入选2020年中国科协优秀中外青年交流计划，获得东北大学优秀博士后称号。

In this project, CBN/Cu-Sn-Ti composites are prepared by cold-press forming and high temperature vacuum brazing. Growth mechanisms of the interfacial layer will be investigated in details. The wettability of Cu-Sn-Ti to CBN particles will be systematically documented, and the influence of different sintering parameters on the thickness and morphology of the interfacial reaction layer of CBN/Cu-Sn-Ti will be quantified. FIB-TEM will be employed to accurately characterize the microstructure and elemental distribution of the interfacial reaction layer. Nucleation ability of different products, nano-crystalline grown behaviors under vapor-solid-liquid conditions and the growth direction of the interfacial products are will be systematically characterized to shed light on the formation and growth mechanism of the reaction layer, and finally make the interface form a high strength metallurgical bonding, which provides a theoretical basis for preparation of excellent processing properties CBN/Cu-Sn-Ti abrasive products. .He has published 7 papers in flagship Metallurgical and Materials Transactions B as the first author, and currently holds 8 national invention patents. He has awarded the 2nd batch of special pre-station funding from the China Postdoctoral Science Foundation. He also has been selected into the Excellent Chinese-Foreign Youth Exchange Program (2020) of the China Association for Science and Technology and awarded the title of Excellent Postdoctoral Fellow of Northeastern University.