New Solid Solution MAX Phases: (Ti<sub>0.5</sub>, V<sub>0.5</sub>)<sub>3</sub>AlC<sub>2</sub>, (Nb<sub>0.5</sub>, V<sub>0.5</sub>)<sub>2</sub>AlC, (Nb<sub>0.5</sub>, V<sub>0.5</sub>)<sub>4</sub>AlC<sub>3</sub>and (Nb<sub>0.8</sub>, Zr<sub>0.2</sub>)<sub>2</sub>AlC
Michael NaguibDepartment of Materials Science & Engineering, Drexel University, Philadelphia, PA 19104, USAGrady W. BentzelDepartment of Materials Science & Engineering, Drexel University, Philadelphia, PA 19104, USAJaymeen ShahDepartment of Materials Science & Engineering, Drexel University, Philadelphia, PA 19104, USAJoseph HalimDepartment of Materials Science & Engineering, Drexel University, Philadelphia, PA 19104, USA; Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenE. N. CaspiJun LüThin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenLars HultmanThin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenMichel W. BarsoumDepartment of Materials Science & Engineering, Drexel University, Philadelphia, PA 19104, USA
2014en
ABI
Аннотация
We synthesized the following previously unreported aluminum-containing solid solution Mn+1AXn phases: (Ti0.5, V0.5)3AlC2, (Nb0.5, V0.5)2AlC, (Nb0.5, V0.5)4AlC3 and (Nb0.8, Zr0.2)2AlC. 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 (Ti0.5, V0.5)3AlC2. 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.
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