Ir-Si (Iridium-Silicon)
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Supplemental Literature Review: Section III
Ir-Si (Iridium-Silicon) H. Okamoto
References
No Ir-Si phase diagram was given in [Massalski2]. The Si-rich side (50-100 at.% Si) of the Ir-Si phase diagram was reported by [1993All], as introduced in this section by [1995Oka]. [2006Sha] determined the Ir-rich side (0-50 at.% Si) of this phase diagram by means of x-ray diffraction, electron probe microanalysis, and scanning electron microscopy. Figure 1 shows the complete Ir-Si phase diagram based on the combined work of [1993All] and [2006Sha].
1993All: C.E. Allevato and C.B. Vining, Phase Diagram and Electrical Behavior of Silicon-Rich Iridium Silicide Compounds, J. Alloy. Compd., 1993, 200, p 99-105 1995Oka: H. Okamoto, Comment on Ir-Si (Iridium-Silicon), J. Phase Equilib., 1995, 16(5), p 473-474 2006Sha: J.B. Sha and Y. Yamabe-Mitarai, Phase and Microstructural Evolution of Ir-Si Binary Alloys With fcc/Silicide Structure, Intermetallics, 2006, 14(6), p 672-684
Weight Percent Silicon 0
10
20
30
40
50 60 70 80 100
2600 2447°C 2400
L
2200
1800 1707°C
1600
1545°C 1452°C
1400
Ir2Si
(Ir)
1425°C 1417°C
1408°C
1402°C 1260°C
γIrSi3
4
3
Ir3 Si5
Ir Si
Ir4 Si5
IrSi
Ir3 Si
1414°C
1315°C
1267°C
1200
Ir3 Si2
Temperature,°C
2000
1222°C 80.5
975°C
βIrSi3
1000
800 0
Ir
10
20
30
40
50
60
70
(Si) 80
Atomic Percent Silicon
90
100
Si
Fig. 1 Ir-Si phase diagram
Journal of Phase Equilibria and Diffusion Vol. 28 No. 5 2007
495
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