About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Joining/Bonding of Dissimilar Materials
|
| Presentation Title |
Interfacial Reaction Mechanisms and Microstructural Evolution in Diffusion Couples Between Ti2AlC and Cr, Hf, Mo, Nb, Re, Ta, Ti, V, W and Zr Using Spark Plasma Sintering |
| Author(s) |
Jack Summers, Alex Foncerrada, Miladin Radovic, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Jack Summers |
| Abstract Scope |
Few studies have systematically examined diffusion bonding between MAX phase ceramics and the nine core refractory elements, including Cr, Hf, Mo, Nb, Re, Ta, V, W and Zr. Refractory alloys offer exceptional strength above 1000 °C, but rapid oxidation at elevated temperatures limits service range in open atmosphere. In the present study, pressure-assisted diffusion bonding of Ti2AlC with the nine core refractory elements, including Ti, was performed by Spark Plasma Sintering to assess Ti2AlC as a multifunctional coating for novel refractory alloys. Bonding conditions were varied in temperature, pressure, holding time, and cooling rate to uncover interfacial reaction mechanism and kinetics. Electron microscopy and chemical analysis revealed multilayered reaction zones with compositionally distinct subregions. The probable diffusion mechanisms and reactions are proposed. Interfacial hardness evolution during layer growth was quantified using nanoindentation mapping. |