材料工程2024，Vol.52Issue(7)：33-43,11.DOI:10.11868/j.issn.1001-4381.2024.000006
激光增材制造AlMoxNbTayTiZr难熔高熵合金的高温抗氧化性能
High temperature oxidation resistance of AlMoxNbTayTiZr refractory high entropy alloys fabricated by laser additive manufacturing
摘要
Abstract
Refractory high entropy alloys have excellent high temperature mechanical properties,but the high temperature oxidation resistance has always been one of the limiting factors in their application.Four kinds of refractory high entropy alloys AlNbTaTiZr,AlMoNbTiZr,AlMoNbTaTiZr and AlMo0.5NbTa0.5TiZr were designed and prepared by laser additive manufacturing technology.The oxidation mass gain of AlNbTiZr-based refractory high entropy alloys was measured at 900℃and 1000℃,and the oxidation layer structure of different samples was studied.The effects of Mo and Ta on the high temperature oxidation resistance of AlNbTiZr-based refractory high entropy alloys were compared and analyzed.The results show that the four kinds of as-deposited high entropy alloys prepared by laser additive manufacturing are BCC+HCP dual-phase structures.The dendrites are mainly BCC phases with high melting points,and a small amount of HCP phase rich in Al and Zr is distributed among the dendrites.AlNbTaTiZr shows the best oxidation resistance after oxidation at 900℃and 1000℃for a long time,and Ta instead of Mo to some extent improves the oxidation resistance of refractory high entropy alloys.关键词
难熔高熵合金/激光增材制造/微观组织/高温氧化Key words
refractory high entropy alloy/laser additive manufacturing/microstructure/high temperature oxidation分类
金属材料引用本文复制引用
张智博,李卓,苏冰,申春杰,任鹏吉..激光增材制造AlMoxNbTayTiZr难熔高熵合金的高温抗氧化性能[J].材料工程,2024,52(7):33-43,11.基金项目
国家重点研发计划项目(2023YFB4603300) （2023YFB4603300）
国家科技重大专项(Y2019-Ⅶ-0011-0151) （Y2019-Ⅶ-0011-0151）
