Radiation tolerance of Mn+1AXn phases, Ti3AlC2 and Ti3SiC2

Whittle, Karl R.; Blackford, Mark G.; Aughterson, Robert D.; Moricca, S.; Lumpkin, Gregory R.; Riley, Daniel P.; Zaluzec, Nestor J.

doi:10.1016/j.actamat.2010.04.029

Cited by 189 publications

(131 citation statements)

References 21 publications

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“…Some diffraction orders extinct, indicating a loss of chemical order along the c-axis. Only diffraction spots are observable in the SAED pattern after irradiation, signature of a crystalline material, and without an amorphous contribution, in good agreement with the results of Whittle et al [14] and Wang et al [15]. The dark field micrographs (a) and (b) show that the corresponding diffraction spots originate from the film and the substrate.…”

Section: Evolution As a Function Of The Irradiation Dosesupporting

confidence: 78%

“…There are only few studies about the behavior of MAX phases under ion irradiation, almost exclusively focused on Ti 3 AC 2 (A = Si, Si 1−x Al x , Al) [7,8,9,10,11,12,13,14,15], in addition to (Ti 0.95 Zr 0.05 ) 3 SiC 2 [16] and (Ti,Al)N/Ti 2 AlN x multilayers [17]. They highlight a strong tolerance to damage induced by ion irradiation and a retained crystalline structure, to the exception of Cr 2 AlC and Cr 2 GeC, which amorphize at moderate fluence (10 13 -10 14 Xe.cm −2 ) [18].…”

Section: Introductionmentioning

confidence: 99%

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Contribution of core-loss fine structures to the characterization of ion irradiation damages in the nanolaminated ceramic Ti3AlC2

et al. 2013

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The effect of low energy ion irradiation in the nanolaminated Ti 3 AlC 2 is investigated by means of X-ray diffraction, transmission electron microscopy, electron energy loss and X-ray absorption spectroscopy. The chemical sensitivity and local order probing from core-loss edges provide new insight in the undertanding of structural modifications induced under irradiation. From the analysis of the C K energy loss near edge structure (ELNES) and Al K X-ray absorption near edge structure (XANES) by ab initio calculations, the influence of the layered structure of this compound on the irradiation damage is demonstrated, with preferentialy localized damage in aluminum planes of the structure. On the basis of comparisons between calculations and the experimental spectra, a strutural model is proposed for the irradiated state. This study emphasizes the utility of core-loss fine structure analysis to further understanding of ion irradiation induced damage in complex crystalline materials.

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Section: Evolution As a Function Of The Irradiation Dosesupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Contribution of core-loss fine structures to the characterization of ion irradiation damages in the nanolaminated ceramic Ti3AlC2

et al. 2013

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“…Besides, these materials are characterized by high electro-and thermal conductivities, low coefficients of friction and thermal expansion, resistance to radioactivity and oxidation. They also have self-healing properties [7][8][9][10][11][12][13]. Thus MAX-phase based materials are promising for application in different industries: power electrical, hydrogen, nuclear industries; aviation; space; mechanical and chemical engineering, etc.…”

Section: Introductionmentioning

confidence: 99%

Presence of Oxygen in Ti-Al-C MAX Phases-Based Materials and their Stability in Oxidizing Environment at Elevated Temperatures

et al. 2018

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The Ti3AlC2-, (Ti,Nb)3AlC2-and Ti2AlC-based materials turned out to be more resistant than Crofer JDA steel in oxidizing atmosphere as 1000 h long tests at 600• C have shown. But the amounts of oxygen absorbed by the materials during testing were different. The Ti2AlC-based material demonstrated the lowest oxygen uptake, (Ti,Nb)3AlC2-based absorbed a somewhat higher amount and the highest amount was absorbed by Ti3AlC2-based material. Scanning electron microscopy and the Auger study witnessed that amounts of oxygen in the MAX phases before the exposure in air were as well different: the approximate stoichiometries of the matrix phases of materials were Ti3.1−3.2AlC2−2.2, Ti1.9−4Nb0.06−0.1AlC1.6−2.2O0.1−1.2 and Ti2.3−3.6AlC1−1.9O0.2−0.6, respectively. The higher amount of oxygen present in the MAX phase structures may be the reason for higher resistance to oxidation during long-term heating in air at elevated temperature. The studied materials demonstrated high stabilities in hydrogen atmosphere as well. The bending strength of the Ti3AlC2-and (Ti,Nb)3AlC2-based materials after keeping at 600• C in air and hydrogen increased by 10-15%, but the highest absolute value of bending strength before and after being kept in air and hydrogen demonstrated the Ti2AlC-based material (about 590 MPa).

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“…The M n+1 X n layers interleaved with pure layers of the A-group elements form hexagonal layered structures. Due to the extraordinary mechanical, physical, and chemical related properties, [5][6][7][8][9][10] such as high hardness, high melting point, high strength at elevated temperature, good wear resistance, good thermal shock resistance, good electric conductivity, and chemical inertness, MAX phase compounds have a wide range of possible technological and engineering applications. Particularly, they could become candidates for high-temperature structural materials and protective coatings in the future nuclear reactors.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, they could become candidates for high-temperature structural materials and protective coatings in the future nuclear reactors. 11,12 Irradiation with fast neutrons induces various changes in the mechanical and physical properties of materials. For example, in a fusion process, it is known that the fast fusion neutrons and high fluxes of ions will produce large amount of defects, which mainly consist of self-interstitial atoms and vacancies.…”

Section: Introductionmentioning

confidence: 99%

First-principles investigation of the vacancy effect on the electronic properties in M2AlC(M = V and Nb)

Liu

Duan

2014

AIP Advances

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First principles calculations have been performed to study the mono-vacancy formation energies and electronic properties of M 2 AlC (M = V and Nb) compound. The results show that the M mono-vacancy has a maximum formation energy. While the C mono-vacancy has a minimum formation energy, which means that the C mono-vacancy is the energetically most favorable in M 2 AlC. The d-electrons of M element contribute most to the DOS of M 2 AlC around the Fermi level, it implies that the conductivity of M 2 AlC comes from the transition metal M. The M-C bond is stronger than the M-Al bond, which is caused by the strong hybridization energy peak between M and C atom. In addition, the M-C bond is weaken in the presence of the M or C mono-vacancy. The cell volumes are reduced when the mono-vacancy is formed. These results help us to understand the origin of the defect-related properties and phase stability

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Radiation tolerance of Mn+1AXn phases, Ti3AlC2 and Ti3SiC2

Cited by 189 publications

References 21 publications

Contribution of core-loss fine structures to the characterization of ion irradiation damages in the nanolaminated ceramic Ti3AlC2

Contribution of core-loss fine structures to the characterization of ion irradiation damages in the nanolaminated ceramic Ti3AlC2

Presence of Oxygen in Ti-Al-C MAX Phases-Based Materials and their Stability in Oxidizing Environment at Elevated Temperatures

First-principles investigation of the vacancy effect on the electronic properties in M2AlC(M = V and Nb)

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