| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1499527 | Scripta Materialia | 2012 | 4 Pages |
Abstract
Nb-silicide-based alloys were directionally solidified in yttria moulds. As a result of thermal dissociation of yttria, the alloys were slightly contaminated with oxygen, which caused a competitive oxidation between yttrium and hafnium. The addition of 0.15 at.% yttrium reduced the oxygen increment by 42%, because the buoyant inclusions concentrated around the top surface. The yttrium addition caused a significant purification of the interaction between the yttria mould and the Nb-silicide-based alloys during the directional solidification.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Limin Ma, Xiaoxia Tang, Bin Wang, Lina Jia, Sainan Yuan, Hu Zhang,