Published, Version of Record (VoR)CC BY-NC V4.0, Open
Abstract
HRTEM Lattice Parameter MAX Phase Rietveld Analysis Solid Solution
We synthesized the following previously unreported aluminum-containing solid solution M
n+1
AX
n
phases: (Ti
0.5
, V
0.5
)
3
AlC
2
, (Nb
0.5
, V
0.5
)
2
AlC, (Nb
0.5
, V
0.5
)
4
AlC
3
and (Nb
0.8
, Zr
0.2
)
2
AlC. Rietveld analysis of powder X-ray diffraction patterns was used to calculate the lattice parameters and phase fractions. Heating Ti, V, Al and C elemental powders-in the molar ratio of 1.5:1.5:1.3:2-to 1, 450°C for 2 h in flowing argon, resulted in a predominantly phase pure sample of (Ti
0.5
, V
0.5
)
3
AlC
2
. The other compositions were not as phase pure and further work on optimizing the processing parameters needs to be carried out if phase purity is desired.