Spesial issue

Novel Superhard Materials

This Special issue was edited by Prof. Artem R. Oganov

CONTENTS

Production, Structure, Properties

Dub S. N., Brazhkin V. V., Belous V. A., Tolmacheva G. N., Konevskii P. V. Comparative nanoindentation of single crystals of hard and superhard oxides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

Al-Khatatbeh Y., Lee K. K. M. From superhard to hard: a review of transition metal dioxides TiO₂, ZrO₂, and HfO₂ hardness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 

22

Zhu Q., Feya O. D., Boulfelfel S. E., Oganov A. R. Metastable host–guest structure of carbon. . . . .  . . . . . . . .

40

Hu M., He J., Wang Q., Huang Q., Yu D., Tian Y., Xu B. Covalent-bonded graphyne polymers with high hardness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

53

Kurakevych O. O., Solozhenko V. L. Thermoelastic equation of state of boron suboxide B₆O up to 6 GPa and 2700 K: simplified anderson-grüneisen model and thermodynamic consistency. . . . . . . . . . . . . . . . . . . . . . . 

68

Wang S., Yu X., Zhang J., Zhang Y., Wang L., Leinenweber K., Xu H., Popov D., Park Ch., Yang W., He D., Zhao Y. Crystal structures, elastic properties, and hardness of high-pressure synthesized CrB₂ and CrB₄. . . 

78

Zhao Z. L., Bao K., Duan D. F., Jin X. L., Tian F. B., Li D., Liu B. B., Cui T. Ideal stoichiometric technetium nitrides under pressure: a first-principles study. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

89