TY - GEN
T1 - Effect of Ce Substitution with La and Nd on Microstructure and Mechanical Properties of Al11Ce3
AU - Qi, Jie
AU - Dunand, David C.
N1 - Publisher Copyright:
© The Minerals, Metals & Materials Society 2024.
PY - 2024
Y1 - 2024
N2 - The study investigates the microstructure and mechanical properties of five cast, coarse-grained intermetallic alloys: binary Al11Ce3 and Al11La3, ternary Al11(Ce0.75La0.25)3 and Al11(Ce0.5La0.5)3, and quaternary Al11(Ce0.54La0.27Nd0.19)3 with mischmetal composition. All compounds exhibit a single phase indicating a solid solution among the rare-earth elements (RE = Ce, La, and Nd) on the Ce sublattice of Al11RE3, contrary to Thermo-Calc prediction of segregation of Ce and (La, Nd) into two insoluble compounds. The orthorhombic Immm-structured α-Al11RE3 phase’s lattice parameters increase with increasing La concentration, while the α-β phase transformation temperature decreases. The mechanical properties, encompassing high hardness (4.1–4.3 GPa), low indentation fracture toughness (0.48–0.65 MPa m1/2), together with the high twinning propensity among these five Al11RE3 compounds are remarkably similar. This similarity suggests that these Al11RE3 compounds will exhibit comparable strengthening in Al-RE-based eutectic alloys, while also positioning them as economically and environmentally favorable alternatives to the well-developed binary Al11Ce3 compound formed in current eutectic Al-Ce alloys.
AB - The study investigates the microstructure and mechanical properties of five cast, coarse-grained intermetallic alloys: binary Al11Ce3 and Al11La3, ternary Al11(Ce0.75La0.25)3 and Al11(Ce0.5La0.5)3, and quaternary Al11(Ce0.54La0.27Nd0.19)3 with mischmetal composition. All compounds exhibit a single phase indicating a solid solution among the rare-earth elements (RE = Ce, La, and Nd) on the Ce sublattice of Al11RE3, contrary to Thermo-Calc prediction of segregation of Ce and (La, Nd) into two insoluble compounds. The orthorhombic Immm-structured α-Al11RE3 phase’s lattice parameters increase with increasing La concentration, while the α-β phase transformation temperature decreases. The mechanical properties, encompassing high hardness (4.1–4.3 GPa), low indentation fracture toughness (0.48–0.65 MPa m1/2), together with the high twinning propensity among these five Al11RE3 compounds are remarkably similar. This similarity suggests that these Al11RE3 compounds will exhibit comparable strengthening in Al-RE-based eutectic alloys, while also positioning them as economically and environmentally favorable alternatives to the well-developed binary Al11Ce3 compound formed in current eutectic Al-Ce alloys.
KW - Al-Ce-based alloys
KW - Ce substitution
KW - Microstructure and mechanical properties of Al11RE3 compounds
UR - http://www.scopus.com/inward/record.url?scp=85185715579&partnerID=8YFLogxK
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U2 - 10.1007/978-3-031-50236-1_39
DO - 10.1007/978-3-031-50236-1_39
M3 - Conference contribution
AN - SCOPUS:85185715579
SN - 9783031502354
T3 - Minerals, Metals and Materials Series
SP - 415
EP - 427
BT - Rare Metal Technology 2024
A2 - Forsberg, Kerstin
A2 - Ouchi, Takanari
A2 - Azimi, Gisele
A2 - Alam, Shafiq
A2 - Neelameggham, Neale R.
A2 - Baba, Alafara Abdullahi
A2 - Peng, Hong
A2 - Karamalidis, Athanasios
PB - Springer Science and Business Media Deutschland GmbH
T2 - 11th Symposium on Rare Metal Extraction and Processing, 2024
Y2 - 3 March 2024 through 7 March 2024
ER -