When Atoms Choose Their Neighbors: Element-Specific Views of Local Chemical Order in High-Entropy Alloys.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41801183.
- Also identified by DOI 10.1021/acsnano.5c21782.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Local chemical order (LCO) is a key descriptor linking composition, atomic arrangement, and function in high-entropy alloys (HEAs) yet remains difficult to quantify. This perspective highlights how X-ray absorption spectroscopy (XAS) provides element-specific, quantitative insight into LCO in complex alloys. We outline practical considerations for XAS data collection and fitting, including the width of spectra range, multitemperature analysis, and X-ray absorption edge choice for 5d elements. We then highlight a coordination-number-based framework for LCO analysis and use model HEAs to show how single-atom and near-single-atom motifs naturally emerge as component number increases, bridging HEAs and single-atom alloys. Finally, we identify priorities, including standardized protocols, uncertainty quantification, expanded operando and time-resolved XAS, and integration with complementary characterization and modeling.