Minimal effect of stacking number on intrinsic cleavage and shear behavior of Tin+1AlCn and Tan+1AlCn MAX phases

Son, Woongrak; Duong, Thien; Talapatra, Anjana; Prehn, Evan; Tan, Zeyi; Radović, Miladin; Arróyave, Raymundo

doi:10.1063/1.5026323

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Like ceramics, they possess high stiffness, low density, low thermal expansion coefficients, and good corrosion and oxidation resistances [ 6 , 7 ]. In addition, higher-order MAX phases with n > 3 such as Ta 5 AlC 4 , Ta 6 AlC 5 , Ti 6 AlC 5 , and Ti 7 SnC 6 have been discovered [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of TiC, Si, and Al on Combustion Synthesis of Ti3SiC2/TiC/Ti5Si3 Composites

Yeh,

Lai

2023

Materials

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The fabrication of Ti3SiC2 from TiC-containing reactant compacts was investigated by combustion synthesis in the mode of self-propagating high-temperature synthesis (SHS). The initial sample composition was formulated based on (3 − x)Ti + ySi + (2 − x)C + xTiC + zAl, with stoichiometric parameters of x from 0 to 0.7, y = 1.0 and 1.2, and z = 0 and 0.1. For all samples studied, combustion was sufficiently exothermic to sustain the reaction in the SHS manner. Due to the dilution effect of TiC, combustion wave velocity and reaction temperature substantially decreased with TiC content. When compared with the TiC-free sample, the TiC-containing sample facilitated the formation of Ti3SiC2 and the TiC content of x = 0.5 produced the highest yield. Excess Si (y = 1.2) to compensate for the evaporation loss of Si during combustion and the addition of Al (z = 0.1) to promote the phase conversion were effective in improving the evolution of Ti3SiC2. All final products were composed of Ti3SiC2, TiC, and Ti5Si3. For the TiC-containing samples of x = 0.5, the weight fraction of Ti3SiC2 increased from 67 wt.% in the sample without extra Si and Al to 72 wt.% in the Si-rich sample of y = 1.2 and further up to 85 wt.% in the Si-rich/Al-added sample of y = 1.2 and z = 0.1. As-synthesized Ti3SiC2 grains were in a thin plate-like shape with a thickness of 0.5–1.0 μm and length of about 10 μm. Ti3SiC2 platelets were closely stacked into a layered structure.

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Section: Introductionmentioning

confidence: 99%

Effects of TiC, Si, and Al on Combustion Synthesis of Ti3SiC2/TiC/Ti5Si3 Composites

Yeh,

Lai

2023

Materials

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Sintering of MAX-phase materials by spark plasma and other methods

et al. 2020

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Combined experimental and first-principles studies of structural and physical properties of β-Ti3SiC2

Zhang

Sun

Gao

et al. 2020

Journal of Applied Physics

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MAX phase materials have shown a series of interesting, even sometimes unusual, properties and exhibited combined attributes of both metals and ceramics, which are due to their “layered ternary transition metal carbides” structures. In the process of studying the multistage phase transformation of 312-MAX phase materials, we found that there were some confusions and mistakes when describing the crystal structures of the β-phase in the existing literature. In order to clarify their structural and physical properties, the β-phase Ti3SiC2 materials have been prepared by using 500 keV He2+-ion irradiation-induced phase transformation and examined by first-principles calculations and Rietveld analysis of grazing incidence x-ray diffraction patterns. Two accurate descriptions of the β-Ti3SiC2 structure are given here. In order to avoid confusion again, it is recommended to use one of the two descriptions uniformly. In addition, some physical properties parameters of β-Ti3SiC2 have been calculated and compared, which also confirmed the correctness of the structure description. Finally, the vacancy formation energies of β-Ti3SiC2 have been predicted and discussed in detail from the points of phase stability and transformation for the first time.

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Minimal effect of stacking number on intrinsic cleavage and shear behavior of Tin+1AlCn and Tan+1AlCn MAX phases

Cited by 3 publications

References 15 publications

Effects of TiC, Si, and Al on Combustion Synthesis of Ti3SiC2/TiC/Ti5Si3 Composites

Effects of TiC, Si, and Al on Combustion Synthesis of Ti3SiC2/TiC/Ti5Si3 Composites

Sintering of MAX-phase materials by spark plasma and other methods

Combined experimental and first-principles studies of structural and physical properties of β-Ti3SiC2

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