文献类型：期刊文献

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

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

第一作者：Gao, Rui-zhi

通信作者：Wang, LZ[1]

机构：[1]Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China;[2]Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China;[3]Guizhou Inst Technol, Dept Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China.

年份：2023

外文期刊名：JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL

收录：;EI(收录号：20233214518663);Scopus(收录号：2-s2.0-85167358041);WOS:【SCI-EXPANDED(收录号:WOS:001044224100002)】；

基金：AcknowledgementsThis research is supported by the National Natural Science Foundation of China (Nos. 52064011 and 52264041) and 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

外文关键词：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 3.5-6 & mu;m was found ranging from 6.2 x 10(-18) to 3.6 x 10(-15) N, and that of CaO & BULL;2Al(2)O(3) (CA2) inclusions with radii of 3-5.5 & mu;m ranging from 3.5 x 10(-19) to 8.3 x 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 x 10(-18) to 3.6 x 10(-19) N, reduced by 79% (1.4 x 10(-18) N).