文献类型：期刊文献

中文题名：Agglomeration behavior of alumina inclusions and calcium aluminate inclusions on molten nickel-based superalloy surface

作者：Rui-zhi Gao Lin-zhu Wang Chao-yi Chen Shu-feng Yang Xiang Li Yin Zhang

第一作者：Rui-zhi Gao

机构：[1]School of Materials and Metallurgy,Guizhou University,Guiyang,550025,Guizhou,China;[2]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing,100083,China;[3]Department of Materials and Metallurgy Engineering,Guizhou Institute of Technology,Guiyang,550003,Guizhou,China

第一机构：School of Materials and Metallurgy,Guizhou University,Guiyang,550025,Guizhou,China

年份：2023

卷号：30

期号：11

起止页码：2318-2327

中文期刊名：Journal of Iron and Steel Research(International)

外文期刊名：钢铁研究学报(英文版)

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；

基金：supported by the National Natural Science Foundation of China(Nos.52064011 and 52264041);Guizhou Provincial Science and Technology Projects(No.Qian Ke He Ji Chu ZK[2021]258 and Qian Ke He Cheng Guo[2022]089).

语种：英文

中文关键词：Inclusion;Nickel-based superalloy;Capillary force;Alumina;Calcium aluminate

摘要：Understanding the interactive forces of inclusions on the surface of molten nickel-based superalloys and finding methods to disperse these inclusions help improve performance and service life.The aggregation behavior of aluminum oxide(Al2O3)and calcium aluminate inclusions with different sizes and spacings on the surface of molten nickel-based superalloys was observed in-situ using a high-temperature confocal laser scan microscope.The attractive force acted on Al2O3 inclusions with radii of 3.5-6μm was found ranging from 6.2×10-18 to 3.6×10-15 N,and that of CaO·2Al2O3(CA2)inclusions with radii of 3-5.5μm ranging from 3.5×10-19 to 8.3×10-15 N.The capillary force acted on inclusions on the surface of nickel-based superalloy was calculated based on the Kralchevsky-Paunov model and investigated as a function of inclusion size,spacing,and composition.The calculated results were in the same trend as the experimental results.The capillary force acted on inclusions was also affected by their contact angle,the density,surface energy,and oxygen content of the molten alloy.It decreased with increasing alloy density and decreasing contact angle between inclusion with alloy.Thus,the attractive force acted on Al2O3 inclusions was smaller on the surface of molten nickel-based superalloy than that of molten steel.Decreasing the oxygen content in the molten nickel-based alloy could increase its surface energy,and the attractive force acted on the inclusions would decrease.When the oxygen content in the molten nickel-based alloy decreased from 0.05 to 0.0001 wt.%,the capillary force acted on the Al2O3 inclusions decreased from 1.7×10-18 to 3.6×10-19 N,reduced by 79%(1.4×10-18 N).