Atomic-scale microstructures of Zr2Al3C4 and Zr3Al3C5 ceramics

Crystal structure determination of nanolaminated Ti5Al2C3 by combined techniques of XRPD, TEM and ab initio calculations

“…To compare these two crystal structures, theoretical structure optimizations were conducted using these two types of structure as input models. The calculated total energies are 25818.4489 eV for Ti 15 Al 6 C 9 (R3 _ m) and 17210.0654 eV for Ti 10 Al 4 C 6 (P6 3 /mmc), respectively. The latter crystal structure has a total energy of 25815.0981 eV when its formula is written in Ti 15 Al 6 C 9 , demonstrating that the crystal structure of the space group P6 3 /mmc is less stable.…”

“…Gesing and Jeitschko [14] re-examined the composition and crystal structure of ZrAlC 1x using X-ray diffraction (XRD) technique and the space group was determined as P6 3 /mc and the composition was identified as Zr 3 Al 3 C 5 . Lin et al [15] using a combinational techniques of selected area electron diffraction (SAED) and convergent beam electron diffraction (CBED), determined the space group of both Zr 2 Al 3 C 4 and Zr 3 Al 3 C 5 as P6 3 /mmc. Similarly, more intensive studies are needed to understand the crystal structure of Ti 5 Al 2 C 3 , a new phase with complex structure in the Ti-Al-C system.…”

Microstructure and properties of hot pressed Zr2(Al(Si))4C5/SiC composites

“…The Zr-Al-C carbides show great promise as ceramics of high hardness, strength, and toughness. They are also characterized as having high chemical stability, thermal stability, and strength at high temperature [8][9][10].…”

Effect of Cr7C3 on the mechanical, thermal, and electrical properties of Cr2AlC

“…The nanolayered ternary ceramics M n+1 AX n , where M is an early transition metal, A is an element of IIIA or IVA, X is either C and/or N, and n = 1-3, possess a unique combination of the merits of both metals and ceramics: lightweight, readily machinable, elastically stiff, thermal and electrical conductive, thermal shock and hightemperature oxidation resistant, and damage tolerant [1][2][3][4][5][6][7][8][9].…”