Investigation of mechanical and thermal properties of rare earth pyrochlore oxides by first‐principles calculations

2018 ◽  
Author(s):  
Lan Yang ◽  
Changhua Zhu ◽  
Ye Sheng ◽  
Hongqiang Nian ◽  
Qian Li ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Rare Earth ◽  
First Principles ◽  
Mechanical And Thermal Properties ◽  
First Principles Calculations ◽  
Pyrochlore Oxides

Magnetic structure and bonding of rare-earth diboride compounds R B2 : First-principles calculations

2012 ◽  
Vol 249 (7) ◽  
pp. 1470-1476 ◽  
Author(s):  
S. Kacimi ◽  
B. Bekkouche ◽  
A. Boukortt ◽  
F. Zazoua ◽  
M. Djermouni ◽  
...  
Keyword(s):  
Rare Earth ◽  
Magnetic Structure ◽  
First Principles ◽  
First Principles Calculations ◽  
Structure And Bonding

scholarly journals Physical Properties Investigations of Ternary-Layered Carbides M2PbC (M = Ti, Zr and Hf): First-Principles Calculations

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1445
Author(s):  
Tahani A. Alrebdi ◽  
Mohammed Benali Kanoun ◽  
Souraya Goumri-Said
Keyword(s):  
Elastic Constants ◽  
First Principles ◽  
Mechanical Stability ◽  
Electronic Band Structure ◽  
Max Phase ◽  
Mechanical And Thermal Properties ◽  
First Principles Calculations ◽  
Electronic Band ◽  
Bonding Properties ◽  
Structure Density

We investigated structure optimization, mechanical stability, electronic and bonding properties of the nanolaminate compounds Ti2PbC, Zr2PbC, and Hf2PbC using the first-principles calculations. These structures display nanolaminated edifices where MC layers are interleaved with Pb. The calculation of formation energies, elastic moduli and phonons reveal that all MAX phase systems are exothermic, and are intrinsically and dynamically stable at zero and under pressure. The mechanical and thermal properties are reported with fundamental insights. Results of bulk modulus and shear modulus show that the investigated compounds display a remarkable hardness. The elastic constants C11 and C33 rise more quickly with an increase in pressure than that of other elastic constants. Electronic and bonding properties are investigated through the calculation of electronic band structure, density of states, and charge densities.

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