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Structure stabilization effect of configuration entropy in cubic WN

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Abstract

The microscopic structure of cubic WN has been studied combining scanning transmission electron microscopy and first-principles calculations. Because of the contribution of configurational entropy, NaCl-type WN with disordered vacancies becomes more stable at high temperatures than NbO-type WN. Moreover, electron beam irradiation can induce an order–disorder transition in cubic WN. It is suggested that the ordered NbO-type WN can be obtained after annealing below the transition temperature. The results shed light on the stability of materials synthesized at high pressures and high temperatures.

Graphical abstract: Structure stabilization effect of configuration entropy in cubic WN

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Publication details

The article was received on 21 Aug 2018, accepted on 02 Nov 2018 and first published on 03 Nov 2018


Article type: Paper
DOI: 10.1039/C8CP05320K
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Structure stabilization effect of configuration entropy in cubic WN

    W. Xing, Y. Zhang, F. Meng, C. Wang, Q. Tao, P. Zhu, J. Zhu and R. Yu, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP05320K

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