摘要
超高温氧化物陶瓷具有优异的高温强度、高温结构稳定性、抗氧化和耐腐蚀性能,有望成为极端高温氧化环境下长期服役的新型高温结构材料,在航空航天领域具有广阔的应用前景。以激光选区熔化和激光近净成形为代表的激光增材制造技术具有高效快速、柔性制造、近净成形等特点,近些年来逐渐应用于超高温氧化物陶瓷的制备并成为该领域的研究热点。本文概述了激光选区熔化技术和激光近净成形技术的原理和特点,从工艺优化、高温预热、超声振动辅助和掺杂4个方面详细阐述了激光增材制造超高温氧化物陶瓷凝固缺陷控制的研究进展,并在文末展望了本领域未来的发展趋势和研究重点。
Ultra-high temperature oxide ceramics have excellent strength and structural stability,as well as outstanding oxidation and corrosion resistance at elevated temperatures,which are expected to become new ultrahigh temperature structural materials for long-term service under extremely high temperature oxidation environments.Laser additive manufacturing(LAM)technology represented by selective laser melting(SLM)and laser engineered net shaping(LENS)has the unique advantages of high efficiency,flexible manufacturing,and engineered net shaping.In recent years,it has been gradually applied to the preparation of ultra-high temperature oxide ceramics and has become a research hotspot in the field.In this paper,the technical principles and characteristics have been overviewed for SLM and LENS.The research progress of solidification defect control during the LAM processes for ultra-high temperature oxide ceramics has been investigated in detail from four aspects:process optimization,high temperature preheating,ultrasonic assistance,and doping.Finally,the development trend and research focus have been prospected for ultra-high temperature oxide ceramics by LAM.
作者
姜浩
苏海军
申仲琳
赵迪
刘园
余明辉
刘怡民
张卓
JIANG Hao;SU Haijun;SHEN Zhonglin;ZHAO Di;LIU Yuan;YU Minghui;LIU Yimin;ZHANG Zhuo(School of Material Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China;Shenzhen Research Institute of Northwestern Polytechnical University,Shenzhen 518057,China)
出处
《航空制造技术》
CSCD
北大核心
2023年第4期61-71,共11页
Aeronautical Manufacturing Technology
基金
国家自然科学基金(52130204,52174376,51822405)
广东省基础与应用基础研究基金(2021B1515120028)
陕西省重点科技创新团队计划(2021TD-17)
中央高校基本科研业务费(D5000210902)
西北工业大学博士论文创新基金(CX2021056,CX2021066)。
