rhenium diboride
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2021 ◽  
Vol 129 (20) ◽  
pp. 205901
Author(s):  
Kaleb C. Burrage ◽  
Changyong Park ◽  
Yogesh K. Vohra

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1657 ◽  
Author(s):  
Kaleb C. Burrage ◽  
Chia-Min Lin ◽  
Wei-Chih Chen ◽  
Cheng-Chien Chen ◽  
Yogesh K. Vohra

An emerging class of superhard materials for extreme environment applications are compounds formed by heavy transition metals with light elements. In this work, ultrahigh pressure experiments on transition metal rhenium diboride (ReB2) were carried out in a diamond anvil cell under isothermal and non-hydrostatic compression. Two independent high-pressure experiments were carried out on ReB2 for the first time up to a pressure of 241 GPa (volume compression V/V0 = 0.731 ± 0.004), with platinum as an internal pressure standard in X-ray diffraction studies. The hexagonal phase of ReB2 was stable under highest pressure, and the anisotropy between the a-axis and c-axis compression increases with pressure to 241 GPa. The measured equation of state (EOS) above the yield stress of ReB2 is well represented by the bulk modulus K0 = 364 GPa and its first pressure derivative K0´ = 3.53. Corresponding density-functional-theory (DFT) simulations of the EOS and elastic constants agreed well with the experimental data. DFT results indicated that ReB2 becomes more ductile with enhanced tendency towards metallic bonding under compression. The DFT results also showed strong crystal anisotropy up to the maximum pressure under study. The pressure-enhanced electron density distribution along the Re and B bond direction renders the material highly incompressible along the c-axis. Our study helps to establish the fundamental basis for anisotropic compression of ReB2 under ultrahigh pressures.


2019 ◽  
Vol 126 (13) ◽  
pp. 135901
Author(s):  
Yi X. Wang ◽  
Zheng X. Yan ◽  
Wei Liu ◽  
Gao L. Zhou

2018 ◽  
Vol 44 (18) ◽  
pp. 22339-22344 ◽  
Author(s):  
Raman Mnatsakanyan ◽  
Davit Davtyan ◽  
Alina Zurnachyan ◽  
Suren Kharatyan ◽  
Edward Karakhanov ◽  
...  

2018 ◽  
Vol 101 (7) ◽  
pp. 3148-3155 ◽  
Author(s):  
Mizraim G. Granados-Fitch ◽  
Juan M. Quintana-Melgoza ◽  
Erick A. Juarez-Arellano ◽  
Miguel Avalos-Borja

2015 ◽  
Vol 277 ◽  
pp. 15-22 ◽  
Author(s):  
Justyna Chrzanowska ◽  
Jacek Hoffman ◽  
Piotr Denis ◽  
Maciej Giżyński ◽  
Tomasz Mościcki

2014 ◽  
Vol 104 (1) ◽  
pp. 011904 ◽  
Author(s):  
Miao Xie ◽  
Björn Winkler ◽  
Zhu Mao ◽  
Richard B. Kaner ◽  
Abby Kavner ◽  
...  

2013 ◽  
Vol 581 ◽  
pp. 206-212 ◽  
Author(s):  
Ming-Min Zhong ◽  
Xiao-Yu Kuang ◽  
Zhen-Hua Wang ◽  
Peng Shao ◽  
Li-Ping Ding ◽  
...  

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