EXPERIMENTAL RESULTS OF ENTHALPIES OF FORMATION AND MELTING POINT MEASUREMENT FOR SEVERAL COMPOUNDS IN Al-Ni-Yb, Al-Ni-Er-Al-Co-Er SYSTEM
Enthalpies of formation and Melting points of investigated compounds.
Compound |
Delta H formation, kJ/mole |
Phase/Comment |
Melting Point |
Number of Transformation |
Al 23 Ni 6 Yb 4 |
Not available |
Yb vaporized before reaction |
Not available |
- |
Al 4 NiEr |
-50.2±1.8 |
oC24 structure confirmed |
1452K |
3 |
Al 23 Ni 6 Er 4 |
-47.6±1.1 |
mC66 structure confirmed |
1402K |
6 |
Al 23 Co 6 Er 4 † |
-48.0±0.9 |
X-ray diffraction indicates the compound Al 23 Co 6 Er 4 doesn't exist. The enthalpy value obtained is for nominal composition Al 23 Co 6 Er 4. |
1264K |
2 |
† Nominal composition