17 citations · 61 across the 8 of their papers we have counts for
8 papers
Influence of dislocation density on the tribological response in oxides: case study on SrTiO3
Chukwudalu Okafor, Oliver Preuß, Thomas Chudoba +6
Most ceramics suffer from brittle surface damage and cracking when small particles slide across the surface under low load. Microscratching tests are a useful technique to mimic th…
Scale-bridging dislocation plasticity in MgO at room temperature
Jiawen Zhang, Zhangtao Li, Yuwei Zhang +7
Dislocations in ceramics have recently gained renewed research interest, in contrast to the traditional belief that ceramics are inherently brittle. Understanding dislocation mecha…
Dislocation response to electric fields in strontium titanate: A mesoscale indentation study
Alexander Frisch, Daniel Isaia, Oliver Preuß +1
Dislocations in perovskite oxides have drawn increasing research interest due to their potential of tuning functional properties of electroceramics. Open questions remain regarding…
Stable crack propagation in dislocation-engineered oxide visualized by double cleavage drilled compression test
Oliver Preuß, Zhangtao Li, Enrico Bruder +4
Understanding crack tip - dislocation interaction is critical for improving the fracture resistance of semi-brittle materials like room-temperature plastically deformable ceramics.…
Dislocation-enhanced piezoelectric catalysis of KNbO3 crystal for water splitting
Hanyu Gong, Jiawen Zhang, Yan Zhao +6
Dislocations in oxides with ionic/covalent bonding hold the potential of harnessing versatile functionalities. Here, high-density dislocations in a large plastic zone in potassium…
Room-temperature dislocation plasticity in ceramics: Methods, Materials, and Mechanisms
Alexander Frisch, Chukwudalu Okafor, Oliver Preuß +5
Dislocation-mediated plastic deformation in ceramic materials has sparked renewed research interest due to the technological potential of dislocations. Despite the long research hi…
Damage-tolerant oxides by imprint of an ultra-high dislocation density
Oliver Preuß, Enrico Bruder, Jiawen Zhang +3
Dislocations in ductile ceramics offer the potential for robust mechanical performance while unlocking versatile functional properties. Previous studies have been limited by small…
Room-temperature bulk plasticity and tunable dislocation densities in KTaO3
Xufei Fang, Jiawen Zhang, Alexander Frisch +4
We report room-temperature bulk plasticity mediated by dislocations in single-crystal cubic KTaO3, contrasting the conventional knowledge that single-crystal KTaO3 is susceptible t…