University of California Irvine

Center for Complex and Active Materials

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2024 IRG-1: The sources and control of interstitial impurities during arc melting of refractory complex concentrated alloys

2024 IRG-1: The sources and control of interstitial impurities during arc melting of refractory complex concentrated alloys

§Refractory complex concentrated alloy (RCCA) exploration and development has been enabled by plasma arc melting (PAM) §Sources of interstitial impurities and variations in PAM are not well documented Key Findings: §Established understanding of the driving forces for...
2024 IRG-1: Conductivity enhancement in sodium-doped multi-phase high entropy oxides

2024 IRG-1: Conductivity enhancement in sodium-doped multi-phase high entropy oxides

Our previous work revealed that the (Co,Cu,Mg,Ni,Zn)1-xNaxO system exhibits an electrically conductive layered grain boundary phase at high-temperature processing conditions (Figure A). This boundary phase is a P2 type NaxCoO2 layered structure that has not been...
2024 IRG-1: Observation of Grain Boundary Electrostatic Characteristics in Perovskite Solid-State Electrolytes by Four-Dimensional Scanning Transmission Electron Microscopy

2024 IRG-1: Observation of Grain Boundary Electrostatic Characteristics in Perovskite Solid-State Electrolytes by Four-Dimensional Scanning Transmission Electron Microscopy

Grain boundaries (GB), which can significantly hinder Li-ion transport, are the bottleneck of improving solid electrolytes’ ionic conductivity. The atomic structure and electrostatic characteristics of GBs thus become pivotal areas of study in materials science. In...
2024 IRG-1: Interplay of chemistry and structure in complex concentrated alloys

2024 IRG-1: Interplay of chemistry and structure in complex concentrated alloys

By increasing the sintering temperature to 1400 °C, the microstructure and chemical distribution of the HENA is significantly optimized. (Fig.1a-b, d-e) By introducing additive Zr into the HENA (sintered at 1400 °C), the microstructure and the compositional...
2024 IRG-2: Understanding the Microscopic Mechanisms Associated with Conductivity in Biological System from First-Principles

2024 IRG-2: Understanding the Microscopic Mechanisms Associated with Conductivity in Biological System from First-Principles

To design improved conductive and bio-compatible nanowires,we aim to understand their electronic structure and electron transfer mechanism, focusing on structure-property relationships. Over the last year, these calculations: •Elucidated the relationship between...
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Center for Complex and Active Materials

University of California, Irvine

Calit2 3100

Irvine, CA 92697

(949) 824-6286

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