报告时间：2026年10月12日（星期一）10:00-12:00
报告地点：材料楼601室
报 告 人：陈杰 博士
工作单位：德国于利希研究中心等离子体物理研究所
举办单位：材料科学与工程学院
报告简介：
SMART (Self-passivating Metal Alloys with Reduced Thermo-oxidation) is being developed as a candidate first-wall material for fusion reactors. Laboratory-scale SMART alloys with a composition of W–11.4Cr–0.6Y (wt.%) have demonstrated promising high-temperature oxidation resistance. Building on this potential, the development of SMART materials at industrial scale is required and is the focus of the a-SMART-FIT project.
This work reports the scale-up of SMART fabrication using industrial powder-metallurgical processing routes. Mechanical alloying of SMART powder batches of up to 4 kg has been successfully achieved, followed by consolidation using field-assisted sintering technology. Recently produced square ingots measuring 10 × 10 × 0.5 cm exhibited a microstructural gradient, characterized by decreasing grain size and increasing inhomogeneity from the center toward the corners. This behavior is attributed to the temperature gradient during sintering; as predicted by COMSOL Multiphysics simulations. In comparison, simulations for hexagonal ingots indicated a lower temperature gradient, suggesting improved microstructural homogeneity. To assess the impact of these microstructural variations on oxidation behavior, thermogravimetric analyses were performed at 1000 °C in humid air on specimens extracted from different parts within the ingots.
In addition, experimental studies on the direct joining of SMART and Eurofer steel are presented. Process-parameter optimization focuses on balancing intermetallic phase formation against diffusion-zone thickness. Ongoing work aims to qualify the resulting joints through heat-flux and mechanical testing.
报告人简介：
陈杰，工学博士，德国于利希研究中心等离子体物理研究所博士后。研究方向为聚变装置第一壁先进材料，主要开展自钝化钨合金的设计、制备与性能研究。2018年毕业于太原理工大学冶金工程专业，获工学学士学位；2020年毕业于瑞典皇家理工学院，获工程材料科学硕士学位；2025年毕业于德国亚琛工业大学，获材料科学博士学位。目前在德国联邦研究、技术与航天部（BMFTR）“a-SAMRT-FIT” 项目支持下，从事钨合金及钨/钢连接组件的工业化制备研究。参加行业学术会议十余次，并做口头报告；发表高水平论文10余篇。
