Examination of B in the Mo solid solution (Moss) in Moss + Mo5SiB2 + Mo2B alloys

SCRIPTA MATERIALIA

卷:163

Article

Liu, Longfei¹  Sun, Congli¹  Zhang, Chenyu¹  Voyles, Paul M.¹  Fournelle, John²  Handt, Anette³  Perepezko, John H.¹ 

[1] Univ Wisconsin, Dept Mat Sci & Engn, 1509 Univ Ave, Madison, WI 53706 USA

[2] Univ Wisconsin, Dept Geosci, 1215 West Dayton St, Madison, WI 53706 USA

[3] Univ Minnesota, Dept Earth Sci, 116 Church St SE, Minneapolis, MN 55455 USA

关键词: Refractory metals;    Scanning/transmission electron microscopy (STEM);    Solid solubility;    Interstitials;   

DOI  :  10.1016/j.scriptamat.2019.01.003

来源: Elsevier

【 摘 要 】

During an examination of the Mo-ss (Mo solid solution) + Mo5SiB2 + Mo2B three phase alloys a lattice constant expansion was observed for the Mo-ss. To identify the origin of the expansion, high precision analysis of scanning transmission electron microscopy images was carried out to determine the solid solution type of B atoms. A quantitative analysis of the non-rigid registration image demonstrates that the B is located at the octahedral sites of the Mo lattice. This conclusion is consistent with the expansion of lattice constant and the small solid solubility limit of B in Mo-ss. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free