6 papers · 1 filter
Grain Boundary Segregation Models for High-Entropy Alloys: Theoretical Formulation and Derived Analytical Expressions to Elucidate High-Entropy Grain Boundaries
Jian Luo
Grain boundary (GB) segregation models are derived for multi-principal element and high-entropy alloys (MPEAs and HEAs). Differing from classical models where one component is take…
Creating Continuously Graded Microstructures with Electric Fields via Locally Altering Grain Boundary Complexions
Qizhang Yan, Chongze Hu, Jian Luo
Tailoring microstructures represents a daunting goal in materials science. Here, an innovative proposition is to utilize grain boundary (GB) complexions (a.k.a. interfacial phases)…
High-Entropy Grain Boundaries
Jian Luo, Naixie Zhou
Do high-entropy alloys and ceramics have their grain boundary (GB) counterparts? As the concept of high-entropy grain boundaries (HEGBs) was initially proposed in 2016, this articl…
Computing Grain Boundary 'Phase' Diagrams
Jian Luo
Grain boundaries (GBs) can be treated as two-dimensional (2-D) interfacial phases (also called 'complexions') that can undergo interfacial phase-like transitions. As bulk phase dia…
Discovery of a reversible redox-induced order-disorder transition in a 10-cation compositionally complex ceramic
Dawei Zhang, Yan Chen, Tianshi Feng +4
This study discovers a reversible order-disorder transition (ODT) in a 10-cation compositionally complex ceramic, (Nd0.15Pr0.15Dy0.8Ho0.8Er0.8Ti0.2Yb0.1Hf0.1Zr0.1Nb0.8)O7-delta, in…
A New Type of Compositionally Complex M5Si3 Silicides: Cation Ordering and Unexpected Phase Stability
Sashank Shivakumar, Mingde Qin, Dawei Zhang +3
A new type of compositionally complex (medium- or high-entropy) M5Si3 silicides is synthesized. Both (V1/5Cr1/5Nb1/5Ta1/5W1/5)5Si3 and (Ti1/5Zr1/5Nb1/5Mo1/5Hf1/5)5Si3 form single-p…