High-pressure synthesis of ultraincompressible hard rhenium nitride pernitride Re2(N2)(N)2 stable at ambient conditions

被引：68

作者：

Bykov, Maxim ^{[1
]}

Chariton, Stella ^{[1
]}

Fei, Hongzhan ^{[1
]}

Fedotenko, Timofey ^{[2
]}

Aprilis, Georgios ^{[2
]}

Ponomareva, Alena, V ^{[3
]}

Tasnadi, Ferenc ^{[4
]}

Abrikosov, Igor A. ^{[4
]}

Merle, Benoit ^{[5
]}

Feldners, Patrick ^{[5
]}

Vogel, Sebastian ^{[6
]}

Schnick, Wolfgang ^{[6
]}

Prakapenka, Vitali B. ^{[7
]}

Greenberg, Eran ^{[7
]}

Hanfland, Michael ^{[8
]}

Pakhomova, Anna ^{[9
]}

Liermann, Hanns-Peter ^{[9
]}

Katsura, Tomoo ^{[1
]}

Dubrovinskaia, Natalia ^{[2
]}

Dubrovinsky, Leonid ^{[1
]}

机构：

[1] Univ Bayreuth, Bayer Geoinst, Univ Str 30, D-95440 Bayreuth, Germany

[2] Univ Bayreuth, Lab Crystallog, Mat Phys & Technol Extreme Condit, Univ Str 30, D-95440 Bayreuth, Germany

[3] Natl Univ Sci & Technol MISIS, Mat Modeling & Dev Lab, Leninskiy Prospekt 4, Moscow 119049, Russia

[4] Linkoping Univ, Dept Phys Chem & Biol IFM, Campus Valla, SE-58183 Linkoping, Sweden

[5] Friedrich Alexander Univ Erlangen Nurnberg FAU, Mat Sci & Engn Inst 1, Martensstr 5, D-91058 Erlangen, Germany

[6] Univ Munich LMU, Dept Chem, Chair Inorgan Solid State Chem, Butenandtstr 5-13 D, D-81377 Munich, Germany

[7] Univ Chicago, Ctr Adv Radiat Sources, 5640 S Ellis, Chicago, IL 60637 USA

[8] European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France

[9] DESY, Photon Sci, Notkestr 85, D-22607 Hamburg, Germany

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

欧洲研究理事会; 俄罗斯科学基金会; 瑞典研究理事会; 美国国家科学基金会;

关键词：

TOTAL-ENERGY CALCULATIONS; ELASTIC-MODULUS; DIBORIDE; INDENTATION; PLATINUM;

D O I：

10.1038/s41467-019-10995-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

High-pressure synthesis in diamond anvil cells can yield unique compounds with advanced properties, but often they are either unrecoverable at ambient conditions or produced in quantity insufficient for properties characterization. Here we report the synthesis of metallic, ultraincompressible (K-0 = 428(10) GPa), and very hard (nanoindentation hardness 36.7(8) GPa) rhenium nitride pernitride Re-2(N-2)(N)(2). Unlike known transition metals pernitrides Re-2(N-2)(N)(2) contains both pernitride N-2(4-) and discrete N3- anions, which explains its exceptional properties. Re-2(N-2)(N)(2) can be obtained via a reaction between rhenium and nitrogen in a diamond anvil cell at pressures from 40 to 90 GPa and is recoverable at ambient conditions. We develop a route to scale up its synthesis through a reaction between rhenium and ammonium azide, NH4N3, in a large-volume press at 33 GPa. Although metallic bonding is typically seen incompatible with intrinsic hardness, Re-2(N-2)(N)(2) turned to be at a threshold for superhard materials.

引用

页数：8

共 58 条

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