Deposition and characterization of Ti2AlC MAX phase and Ti3AlC thin films by magnetron sputtering

Su, Ranran; Zhang, Hongliang; O’Connor, D.J.; Shi, Liqun; Meng, Xiangpeng; Zhang, Hai-Bin

doi:10.1016/j.matlet.2016.05.086

Cited by 35 publications

(8 citation statements)

References 27 publications

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“…Polycrystalline bulk Ti2AlC and Ti3SiC2 were synthesized by the reactive hot-press sintering method [22]. For Ti2AlC, stoichiometric mixtures of Ti + TiAl + C were prepared in argon by hand-grinding a fine powder mixture of Ti (99.5 %, average particle size of 48 µm), Al (99.0 % , average particle size of 48 µm), TiC (99.0 %, average particle size of 5 µm) and C graphite (99.5 %, average particle size of 48 µm) at a molar ratio of 0.5: 1.5: 1: 0.5.…”

Section: Methodsmentioning

confidence: 99%

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Zhang

Kim

et al. 2020

Acta Materialia

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MAB phases are a new class of layered ternary materials that have already shown a number of outstanding properties. Here, we investigate defect evolution and radiation tolerance of two MAB phases, MoAlB and Fe2AlB2, using a combination of experimental characterization and firstprinciples calculations. We find that Fe2AlB2 is more tolerant to radiation-induced amorphization than MoAlB, both at 150 °C and at 300 °C. The results can be explained by the fact that the Mo Frenkel pair is unstable in MoAlB and as a result, irradiated MoAlB is expected to have a significant concentration of MoAl antisites, which are difficult to anneal even at 300 °C. We find that the tolerance to radiation-induced amorphization of MAB phases is lower than in MAX phases, but it is comparable to that of SiC. However, MAB phases do not show radiation-induced cracking which is observed in MAX phases under the same irradiation conditions. This study suggests that MAB phases might be a promising class of materials for applications that involve radiation.

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Section: Methodsmentioning

confidence: 99%

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Zhang

Kim

et al. 2020

Acta Materialia

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“…It has also been revealed that the presence of undesirable Cr 7 C 3 phase diminishes the protection capability of the coating by promoting internal oxidation and favouring embrittling of the coating. Other recent studies of MAX phase coatings [16][17][18] have also shown that the outcome of the obtained phase composition in the MAX coatings is highly influenced by the synthesis methods. For instance, sputtering from a Cr-Al-C hot-pressed composite target [17] was reported to yield crystalline Cr 2 AlC coating; however, the synthesis implied hot pressing at 800 ℃ of the target followed by long time (20 h) annealing procedures at high temperature (620 ℃) of the coating.…”

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confidence: 97%

Incipient low-temperature formation of MAX phase in Cr–Al–C films

Crisan

2018

J Adv Ceram

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Ceramic-metallic MAX phase of chromium aluminium carbide ternary compounds was successfully obtained through deposition by DC sputtering onto Si substrates. A study of the influence of substrate temperature and in-air post-annealing on the film crystallinity and oxidation was undertaken. Scanning electron microscopy (SEM), wavelength-dispersive X-ray analysis (WDSX), and X-ray diffraction (XRD) were used for film characterization. It is shown that, at substrate temperature of about 450 ℃, as-deposited films are amorphous with small nanocrystals. Subsequent annealing in air at 700 ℃ leads to film crystallization and partial oxidation. WDSX spectroscopy shows that the films oxidise to a depth of around 120 nm, or 5% of total film thickness which amounts at around 2.68 µm. As a novelty, this demonstrates the possibility of in-air crystallization of Cr 2 AlC films without significant oxidation. Materials Analysis Using Diffraction (MAUD) software package for a full-profile analysis of the XRD patterns (Rietveld-type) was used to determine that, as a result of annealing, the average crystallite size changes from 7 to 34 nm, while microstrain decreases from 0.79% to 0.24%. A slight tendency of preferential growth along the (10 10) direction has been observed. Such texturing of the microstructure has the potential of inducing beneficial anisotropic fracture behaviour in the coatings, potentially interesting for several industrial applications in load-bearing devices.

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“…SiC, TiC, Ti 3 SiC 2 are all promising materials for the application as structural and coating materials in nuclear reactors. The MAX phases have superior resistance to radiation-induced amorphization compared to conventional ceramics ( 22 , 23 ). Ti 3 SiC 2 is one of the MAX phases that have been confirmed to have nearly the best radiation tolerance to radiation-induced amorphization and cracks among MAX phase materials ( 24 ).…”

Section: Introductionmentioning

confidence: 99%

Enhancing the phase stability of ceramics under radiation via multilayer engineering

Zhang

et al. 2021

Sci. Adv.

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In metallic systems, increasing the density of interfaces has been shown to be a promising strategy for annealing defects introduced during irradiation. The role of interfaces during irradiation of ceramics is more unclear because of the complex defect energy landscape that exists in these materials. Here, we report the effects of interfaces on radiation-induced phase transformation and chemical composition changes in SiC-Ti3SiC2-TiCx multilayer materials based on combined transmission electron microscopy (TEM) analysis and first-principles calculations. We found that the undesirable phase transformation of Ti3SiC2 is substantially enhanced near the SiC/Ti3SiC2 interface, and it is suppressed near the Ti3SiC2/TiC interface. The results have been explained by ab initio calculations of trends in defect segregation to the above interfaces. Our finding suggests that the phase stability of Ti3SiC2 under irradiation can be improved by adding TiCx, and it demonstrates that, in ceramics, interfaces are not necessarily beneficial to radiation resistance.

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Deposition and characterization of Ti2AlC MAX phase and Ti3AlC thin films by magnetron sputtering

Cited by 35 publications

References 27 publications

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Incipient low-temperature formation of MAX phase in Cr–Al–C films

Enhancing the phase stability of ceramics under radiation via multilayer engineering

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