Abstract
We have investigated phase relationships of the sesquisilicide alloys in the Ru-Mn-Si system. A series of chimney-ladder phases Ru 1-x Mn x Si y (0.14 ≤ x ≤ 0.97, 1.584 ≤ y ≤ 1.741) are formed over a wide compositional range between Ru 2Si 3 and Mn 4Si 7. We also investigated thermoelectric properties of the directionally solidified Ru 1-x Mn x Si y alloys as a function of Mn content and temperature. The dimensionless figure of merit ZT for alloys with high Mn content (x ≥ 0.75) increases as the Mn content increases. The alloy with x = 0.90 exhibits ZT as high as 0.76 at 874 K.
Original language | English |
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Pages (from-to) | 1640-1644 |
Number of pages | 5 |
Journal | Journal of Electronic Materials |
Volume | 39 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2010 Sep 1 |
Externally published | Yes |
Keywords
- Transition-metal silicide
- thermal conductivity
- transmission electron microscopy (TEM)
- valence electron count (VEC)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry