文献类型：期刊文献

英文题名：Effect of Mg Treatment on the Nucleation and Ostwald Growth of Inclusions in Fe-O-Al-Mg Melt

作者：Li, Yutang Wang, Linzhu Chen, Chaoyi Li, Junqi Li, Xiang

第一作者：Li, Yutang

通信作者：Wang, LZ[1]

机构：[1]Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Coll Mat & Met Engn, Guiyang 550003, Peoples R China

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

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

年份：2020

卷号：13

期号：15

外文期刊名：MATERIALS

收录：;EI(收录号：20203509095851);Scopus(收录号：2-s2.0-85089742530);WOS:【SCI-EXPANDED(收录号:WOS:000559523000001)】；

基金：This project is s financially supported by the National Science Foundation of China with the grant No. 51804086, 51704085, 51864013 and 51704083. Also, this project supported by National Natural Science Foundation of Guizhou Province with grant No. [2019]1086. Program Foundation for Talents of Education department of Guizhou Province with grant No. Qian Jiao He [2018] 105 is gratefully acknowledged.

语种：英文

外文关键词：Mg treatment; inclusion; nucleation; growth; holding time (second)

摘要：This study aimed to investigate the effect of Mg treatment on the nucleation and ostwald growth of inclusions. Deoxidized experiments with Al (0.05%Al) and Al-Mg (0.05%Al + 0.03%Mg) were carried out at 1873 K, and the composition, number, and size of inclusions were studied as a function of holding time. Homogeneous nucleation theory and ostwald ripening were utilized to calculate the nucleation rate, the critical size of nuclei, and coarsening rate of inclusions. The results show that small inclusions were more easily found in the steels with Al-Mg complex deoxidation, and the number of inclusions with Al-Mg complex deoxidation is larger at an early stage of deoxidation. The critical size of nuclei increases in the order of MgAl2O4(0.3-0.4 nm) < Al2O3(0.4-0.6 nm), and the nucleation rate increases in the order of Al2O3(1100 cm(-3)s(-1)) < MgAl2O4(1200 cm(-3)s(-1)), which is consistent with the experimental results. Moreover, the coarsening rate of MgAl(2)O(4)inclusions was smaller than Al(2)O(3)inclusions in both the value ofk(d(cal.))from ostwald growth and the value ofk(d(obs.))from inclusion size. The effect of Mg addition on coarsening of inclusion was analyzed and their mechanism was discussed based on ostwald ripening theory and Factsage calculation.