On the interactions of Ti${_2}$AlC, Ti${_3}$AlC${_2}$, Ti${_3}$SiC${_2}$ and Cr${_2}$AlC with palladium at 900 °C

G. W. Bentzel; M. Sokol; J. Griggs; A. C. Lang; M. W. Barsoum

doi:10.1016/j.jallcom.2018.08.127

paper

On the interactions of Ti $_{2}$ AlC, Ti $_{3}$ AlC $_{2}$ , Ti $_{3}$ SiC $_{2}$ and Cr $_{2}$ AlC with palladium at 900 °C

arXiv:1811.00098 · doi:10.1016/j.jallcom.2018.08.127

Abstract

Herein we report on the reactivity between palladium, Pd, and the MAX phases, Ti $_{2}$ AlC, Ti $_{3}$ AlC $_{2}$ , Ti $_{3}$ SiC $_{2}$ and Cr $_{2}$ AlC. Diffusion couples of Pd/MAX were heated to 900 °C under uniaxial stress of ~20 MPa for 2, 4, and 10 h in a vacuum (<1 Pa) hot press. The diffusion couples were examined using X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. After heating to 900 °C for 10 h, the diffusion layer thicknesses in the Ti $_{2}$ AlC/Pd, Cr $_{2}$ AlC/Pd, Ti $_{3}$ AlC $_{2}$ /Pd and Ti $_{3}$ SiC $_{2}$ /Pd couples were found to be 35, 45, 105 and 410 mm, respectively. Thus, Ti $_{2}$ AlC is the most resistant to reaction, while Ti $_{3}$ SiC $_{2}$ is least resistant, with Cr $_{2}$ AlC and Ti $_{3}$ AlC $_{2}$ , in between. In all cases, the reaction occurred by the diffusion of the A-group element into Pd, concomitant with Pd diffusion into the MAX phase. No diffusion of the M and X atoms was detected.

8 pages, 11 figures

On the interactions of Ti2​AlC, Ti3​AlC2​, Ti3​SiC2​ and Cr2​AlC with palladium at 900 °C

Abstract

On the interactions of Ti $_{2}$ AlC, Ti $_{3}$ AlC $_{2}$ , Ti $_{3}$ SiC $_{2}$ and Cr $_{2}$ AlC with palladium at 900 °C