About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Tuning Hardness and Fracture Toughness of SPS-Sintered MgAl2O4 + YSZ via Na Doping and Field-Assisted Microindentation |
| Author(s) |
Kavan Sanjaykumar Joshi, Ricardo H.R. Castro |
| On-Site Speaker (Planned) |
Kavan Sanjaykumar Joshi |
| Abstract Scope |
This study examines the effect of sodium (Na) doping on the mechanical properties of Magnesium Aluminate MgAl2O4 + yttria-stabilized zirconia (YSZ) composites, with a particular focus on the influence of an externally applied electric field during hardness testing. Samples were synthesized via Spark Plasma Sintering (SPS), both with and without Na doping. Vickers microindentation was employed to assess hardness and estimate fracture toughness, and measurements were conducted under both standard and field-assisted conditions. The Na-doped samples exhibited lower hardness but enhanced fracture toughness compared to the undoped counterparts. When an electric field was applied during indentation, both doped and undoped samples showed further changes in mechanical response, indicating field-induced effects on crack propagation and localized deformation. This study provides insight into how external stimuli and chemical modification can be used to tune the performance of ceramic composites. |