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研究MC与Mn+1ACn(M=Sc, Ti, V, Cr, Mn; A=Al, Si, P, S; n=1, 2, 3)结构的稳定性与电子特征有利于探究三元层状结构Mn+1ACn稳定性的内在原因和设计新型Mn+1ACn结构. 第一性原理计算研究表明, M-3d与C-2p轨道间的电子转移对MC与Mn+1ACn 的形成焓有较大影响. 供电子能力较强的前过渡金属可以形成稳定的MC结构. 计算结果显示, MC结构是缺电子体系, 其趋向于与具有一定供电子能力的MA结构结合形成Mn+1ACn. 与M2PC和M2SC 相比, M2AlC和M2SiC可以更为容易地被分离成二维 M2C结构.Investigation of the stability and electronic properties of a series of MC compounds and classic MAX phases, Mn+1ACn (M=Sc, Ti, V, Cr, and Mn; A=Al, Si, P, and S; n=1, 2, and 3), contributes to finding the intrinsic mechanism of the stability of Mn+1ACn and to the design of new Mn+1ACn phases. First-principles calculations show that the formation enthalpy of both MC and Mn+1ACn is directly correlated with the charge transfer from M-3d to C-2s and 2p orbitals. Correspondingly, the early transition metals with high electron donation ability are able to form stable MC phases. Among the various MC phases, MC is found to be electron-deficient, which is thus favorable to react with electron-abundant MA to form Mn+1ACn. Therefore, M2AlC and M2SiC can be more readily separated into two-dimensional M2C structures, compared to M2PC and M2SC.
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Keywords:
- MAX phases /
- first-principles /
- electronic structures /
- transition metal carbides
[1] Mashtalir O, Naguib M, Dyatkin B, Gogotsi Y, Barsoum M W 2013 Mater. Chem. Phys. 139 147
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[30] Zhou Y C, Wang X H, Sun Z M, Chen S Q 2001 J. Mater. Chem. 11 2335
[31] Wang J, Chen X G, Yang N, Fang Z Z 1993 Appl. Phys. A: Mater. 56 307
[32] Pfluger J, Fink J, Weber W, Bohnen K P, Crecelius G 1984 Phys. Rev. B 30 1155
[33] Khazaei M, Arai M, Sasaki T, Chung C Y, Venkataramanan N S, Estili M, Sakka Y, Kawazoe Y 2013 Adv. Funct. Mater. 23 2185
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[1] Mashtalir O, Naguib M, Dyatkin B, Gogotsi Y, Barsoum M W 2013 Mater. Chem. Phys. 139 147
[2] Mo Y, Rulis P, Ching W Y 2012 Phys. Rev. B 86 165122
[3] Shein I R, Ivanovskii A L 2013 Physica B 410 42
[4] Radovic M, Barsoum M W 2013 Am. Ceram. Soc. Bull. 92 20
[5] Eklund P, Beckers M, Jansson U, Hogberg H, Hultman L 2010 Thin Solid Films 518 1851
[6] Yang Z J, Guo Y D, Linghu R F, Cheng X L, Yang X D 2012 Chin. Phys. B 21 056301
[7] Yang Z J, Linghu R F, Cheng X L, Yang X D 2012 Acta Phys. Sin. 61 046301 (in Chinese) [杨则金, 令狐荣锋, 程新路, 杨向东 2012 61 046301]
[8] Yang Z J, Guo Y D, Linghu R F, Yang X D 2012 Chin. Phys. B 21 036301
[9] Patel M K, Tallman D J, Valdez J A, Aguiar J, Anderoglu O, Tang M, Griggs J, Fu E G, Wang Y Q, Barsoum M W 2014 Scripta Mater. 77 1
[10] Jiang J X, Jin S, Wang Z H, Tan C L 2011 Chin. Phys. Lett. 28 037101
[11] Naguib M, Mashtalir O, Carle J, Presser V, Lu J, Hultman L, Gogotsi Y, Barsoum M W 2012 ACS Nano 6 1322
[12] Medvedeva N I, Enyashin A N, Ivanovskii A L 2011 J. Struct. Chem. 52 785
[13] Shein I R, Ivanovskii A L 2013 Micro. Nano Lett. 8 59
[14] Hu Q K, Sun D D, Wu Q H, Wang H Y, Wang L B, Liu B Z, Zhou A G, He J L 2013 J. Phys. Chem. A 117 14253
[15] Peng Q M, Guo J X, Zhang Q R, Xiang J Y, Liu B Z, Zhou A G, Liu R P, Tian Y J 2014 J. Am. Chem. Soc. 136 4113
[16] Naguib M, Halim J, Lu J, Cook K M, Hultman L, Gogotsi Y, Barsoum M W 2013 J. Am. Chem. Soc. 135 15966
[17] Dahlqvist M, Alling B, Rosen J 2010 Phys. Rev. B 81 220102
[18] Eklund P, Dahlqvist M, Tengstrand O, Hultman L, Lu J, Nedfors N, Jansson U, Rosen J 2012 Phys. Rev. Lett. 109 035502
[19] Dahlqvist M, Alling B, Abrikosov I A, Rosen J 2011 Phys. Rev. B 84 220403
[20] Xie Y, Kent P 2013 Phys. Rev. B 87 235441
[21] Kresse G, Furthmuller J 1996 Comput. Mater. Sci. 6 15
[22] Kresse G, Furthmuller J 1996 Phys. Rev. B 54 11169
[23] Kresse G, Hafner J 1994 Phys. Rev. B 49 14251
[24] Perdew J P, Burke K, Ernzerhof M 1997 Phys. Rev. Lett. 78 1396
[25] Kresse G, Joubert D 1999 Phys. Rev. B 59 1758
[26] Blochl P E 1994 Phys. Rev. B 50 17953
[27] Monkhorst H J, Pack J D 1976 Phys. Rev. B 13 5188
[28] Lontsi-Fomena M, Villesuzanne A, Doumerc J P, Frayret C, Pouchard M 2008 Comput. Mater. Sci. 44 53
[29] Shein I R, Ivanovskii A L 2012 Comput. Mater. Sci. 65 104
[30] Zhou Y C, Wang X H, Sun Z M, Chen S Q 2001 J. Mater. Chem. 11 2335
[31] Wang J, Chen X G, Yang N, Fang Z Z 1993 Appl. Phys. A: Mater. 56 307
[32] Pfluger J, Fink J, Weber W, Bohnen K P, Crecelius G 1984 Phys. Rev. B 30 1155
[33] Khazaei M, Arai M, Sasaki T, Chung C Y, Venkataramanan N S, Estili M, Sakka Y, Kawazoe Y 2013 Adv. Funct. Mater. 23 2185
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