scholarly journals First Principles Study on Structure Stability and Mechanical Properties of YNi2B2C and LuNi2B2C under Pressure

Crystals ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 173 ◽  
Author(s):  
Lili Liu ◽  
Xiaozhi Wu ◽  
Rui Wang ◽  
Zhengquan Hu ◽  
Youchang Jiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
First Principles ◽  
Structure Stability ◽  
First Principles Study

Thermoelectric and mechanical properties of XHfSn (X=Ni, Pd and Pt) semiconducting Half-heusler alloys: A first-principles study

2021 ◽  
Vol 26 ◽  
pp. e00539
Author(s):  
Jonah Nagura ◽  
Timothy M. Ashani ◽  
Paul O. Adebambo ◽  
F. Ayedun ◽  
Gboyega A. Adebayo
Keyword(s):  
Mechanical Properties ◽  
First Principles ◽  
Heusler Alloys ◽  
First Principles Study

Effect of Hf additions on phase stability and mechanical properties of binary W-Hf alloys: A first-principles study

2018 ◽  
Vol 137 ◽  
pp. 295-302 ◽  
Author(s):  
Diyou Jiang ◽  
Tao Wang ◽  
Xiaohua Huang ◽  
Xiongzhi Zou ◽  
Jianfeng Hu
Keyword(s):  
Mechanical Properties ◽  
Phase Stability ◽  
First Principles ◽  
First Principles Study

Effect of Alloying Elements V, Cr and Ni on the Electronic Structure and Mechanical Properties of FeAl from First-Principles Calculation

2014 ◽  
Vol 887-888 ◽  
pp. 378-383 ◽  
Author(s):  
Yu Chen ◽  
Zheng Jun Yao ◽  
Ping Ze Zhang ◽  
Dong Bo Wei ◽  
Xi Xi Luo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electronic Structure ◽  
Elastic Constants ◽  
First Principles ◽  
Density Functional ◽  
Valence Bond ◽  
Ternary Alloys ◽  
First Principles Calculation ◽  
Structure Stability ◽  
Alloying Element

The structure stability, mechanical properties and electronic structures of B2 phase FeAl intermetallic compounds and FeAl ternary alloys containing V, Cr or Ni were investigated using first-principles density functional theory calculations. Several models are established. The total energies, cohesive energies, lattice constants, elastic constants, density of states, and the charge densities of Fe8Al8 and Fe8XAl7 ( X=V, Cr, Ni ) are calculated. The stable crystal structures of alloy systems are determined due to the cohesive energy results. The calculated lattice contants of Fe-Al-X ( X= V, Cr, Ni) were found to be related to the atomic radii of the alloy elements. The calculation and analysis of the elastic constants showed that ductility of FeAl alloys was improved by the addition of V, Cr or Ni, the improvement was the highest when Cr was used. The order of the ductility was as follows: Fe8CrAl7 > Fe8NiAl7 > Fe8VAl7 > Fe8Al8. The results of electronic structure analysis showed that FeAl were brittle, mainly due to the orbital hybridization of the s, p and d state electron of Fe and the s and p state electrons of Al, showing typical characteristics of a valence bond. Micro-mechanism for improving ductility of FeAl is that d orbital electron of alloying element is maily involved in hybridization of FeAl, alloying element V, Cr and Ni decrease the directional property in bonding of FeAl.

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