Formation of the MAX-phase oxycarbide Ti2AlC1-xOx studied via electron energy-loss spectroscopy and first-principles calculations

被引：35

作者：

Persson, P. O. A. ^{[1
]}

Rosen, J. ^{[1
]}

McKenzie, D. R. ^{[2
]}

Bilek, M. M. M. ^{[2
]}

机构：

[1] Linkoping Univ, S-58183 Linkoping, Sweden

[2] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 09期

基金：

澳大利亚研究理事会;

关键词：

aluminium compounds; APW calculations; electron energy loss spectra; electron microscopy; fine structure; laminates; nanostructured materials; titanium compounds; CARBIDE;

D O I：

10.1103/PhysRevB.80.092102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxygen incorporation in the Ti2AlC MAX phase and TiC was investigated in the electron microscope using spatially resolved fine-structure electron energy-loss spectroscopy analysis. Corresponding fine structures were calculated within the full-potential-linearized augmented plane-wave framework. In the calculations, oxygen was substituted for aluminum and carbon in Ti2AlC as well as for carbon in TiC, in concentrations of 3.1, 6.2, and 12.5 at %. Comparison of calculated and measured spectra shows that oxygen is incorporated on the carbon site in both TiC and Ti2AlC. These findings reveal the existence of MAX phase oxycarbide MA(O,C) alloys and O as a third X element in addition to C and N.

引用

页数：4

共 21 条

[1] Processing and characterization of Ti2AlC, Ti2AlN, and Ti2AlC0.5N0.5
Barsoum, MW
Ali, M
El-Raghy, T
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2000, 31 (07): : 1857 - 1865
[2] The MN+1AXN phases:: A new class of solids;: Thermodynamically stable nanolaminates
Barsoum, MW
[J]. PROGRESS IN SOLID STATE CHEMISTRY, 2000, 28 (1-4) : 201 - 281
[3] Barsoum MW, 2001, AM SCI, V89, P334, DOI 10.1511/2001.4.334
[4] Blaha P, 2001, CALCULATING CRYSTAL, V60
[5] First-principles investigation of intrinsic defects and (N, O) impurity atom stimulated Al vacancy in Ti2AlC
Liao, Ting
Wang, Jingyang
Zhou, Yanchun
[J]. APPLIED PHYSICS LETTERS, 2008, 93 (26)
[6] Synthesis and compressibility of Ti3(Al,Sn0.2)C2 and Ti3Al(C0.5,N0.5)2
Manoun, Bouchaib
Saxena, S. K.
Hug, Gilles
Ganguly, A.
Hoffman, E. N.
Barsoum, M. W.
[J]. JOURNAL OF APPLIED PHYSICS, 2007, 101 (11)
[7] Influence of Oxygen Addition on the Structural and Elastic Properties of TiC Thin Films
Marques, Luis S. A.
Fernandes, Ana. C.
Vaz, Filipe
Ramos, Marta M. D.
[J]. PLASMA PROCESSES AND POLYMERS, 2007, 4 : S195 - S199
[8] Electronic properties of Ti3SiC2-based solid solutions
Medvedeva, NI
Novikov, DL
Ivanovsky, AL
Kuznetsov, MV
Freeman, AJ
[J]. PHYSICAL REVIEW B, 1998, 58 (24): : 16042 - 16050
[9] Strengthening of Ti2AlC by substituting Ti with V
Meng, FL
Zhou, YC
Wang, JY
[J]. SCRIPTA MATERIALIA, 2005, 53 (12) : 1369 - 1372
[10] STRUCTURAL CHEMISTRY OF COMPLEX CARBIDES AND RELATED-COMPOUNDS
NOWOTNY, H
ROGL, P
SCHUSTER, JC
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1982, 44 (01) : 126 - 133

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