A5036663450- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Fusion materials and technologies
- Nuclear Materials and Properties
- ZnO doping and properties
- High Temperature Alloys and Creep
- Advanced materials and composites
- Advanced Materials Characterization Techniques
- Additive Manufacturing Materials and Processes
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal and Thin Film Mechanics
- Electron and X-Ray Spectroscopy Techniques
- Microstructure and Mechanical Properties of Steels
- Advanced Photocatalysis Techniques
- Semiconductor materials and devices
- Ga2O3 and related materials
- Advanced ceramic materials synthesis
- Ion-surface interactions and analysis
- Silicon Carbide Semiconductor Technologies
- Gas Sensing Nanomaterials and Sensors
- Intermetallics and Advanced Alloy Properties
- Microstructure and mechanical properties
- Magnetic properties of thin films
- Advanced Electron Microscopy Techniques and Applications
- GaN-based semiconductor devices and materials
City University of Hong Kong
2016-2025
National Tsing Hua University
2011-2020
Kowloon Hospital
2020
National Synchrotron Radiation Research Center
2014
Industrial Technology Research Institute
2007-2014
National Yang Ming Chiao Tung University
2007-2013
University System of Taiwan
2013
Institute of Atomic and Molecular Sciences, Academia Sinica
2003
National Taiwan Normal University
2003
National Taiwan University
2003
Alloy design based on single-principal-element systems has approached its limit for performance enhancements. A substantial increase in strength up to gigapascal levels typically causes the premature failure of materials with reduced ductility. Here, we report a strategy break this trade-off by controllably introducing high-density ductile multicomponent intermetallic nanoparticles (MCINPs) complex alloy systems. Distinct from intermetallic-induced embrittlement under conventional wisdom,...
Strength through disorder Jet turbine blades and other objects with ultrahigh strength at high temperatures are made of special alloys that often grown as costly single crystals to help avoid failure. Yang et al. discovered adding a small amount boron in nickel-cobalt-iron-aluminum-titanium alloy creates an ultrahigh-strength material. Critically, the has nanoscale-disordered interface between crystal grains substantially improves ductility while preventing high-temperature grain coarsening....
Electrochemical water splitting offers an attractive approach for hydrogen production. However, the lack of high-performance cost-effective electrocatalyst severely hinders its applications. Here, a multinary high-entropy intermetallic (HEI) that possesses unusual periodically ordered structure containing multiple non-noble elements is reported, which can serve as highly efficient evolution. This HEI exhibits excellent activities in alkalinity with overpotential 88.2 mV at current density 10...
Noble metal elements are the key to many high-performance heterogeneous catalytic processes; nevertheless, how reduce usage of such scarce and prohibitive materials while maintaining or even enhancing desired performance has always been a grand challenge. In this work, we introduce general dealloying procedure synthesize series predesigned rugged high-entropy alloy (HEA) nanowires, including Al–Ni–Co–Ru–X, where X = Mo, Cu, V, Fe as trifunctional electrocatalysts for hydrogen evolution...
Designing and fabricating bifunctional electrocatalysts for both the oxygen reduction reaction (ORR) evolution (OER) is crucial to high-performance rechargeable metal–air batteries. Herein, we introduce a generic dealloying procedure fabricate nanoporous spinel high-entropy oxides (HEO) (AlCoFeMoCr)3O4 as OER catalysts, incorporated with highly dispersed Pt or PtPdCuAgAu clusters/nanoparticles of ∼1.5 nm in diameters ORR catalysts on porous HEO. Our combined experimental results...
Nanoparticle strengthening provides a crucial basis for developing high-performance structural materials with potentially superb mechanical properties applications. However, the general wisdom often fails to work well due poor thermal stability of nanoparticles, and rapid coarsening these particles will lead accelerated failures especially at elevated temperatures. Here, we demonstrate strategy achieve ultra-stable nanoparticles 800~1000 °C in Ni59.9-xCoxFe13Cr15Al6Ti6B0.1 (at.%) chemically...
A contact has been developed to achieve a low specific resistance p-type GaN. The consisted of bi-layer Ni/Au film deposited on GaN followed by heat treatment in air transform the metallic Ni into NiO along with an amorphous Ni–Ga–O phase and large Au grains. as 4.0×10−6 Ω cm2 was obtained at 500 °C. This value optimization thickness temperatures. Below about 400 °C, not completely oxidized. On other hand, temperatures higher than 600 increased because detached from p-GaN amount formed more...
Growing carbon nanotubes (CNTs) by arcing from graphite electrodes does not demand a noble gas atmosphere: water will do! CO and H2 bubbles generated reaction of C vapor with provide quasi-inert atmosphere in which multiwalled grow the cathode. Using cobalt salt solutions instead plain water, authors obtained CNTs filled metallic elemental sulfur (see Figure), potentially useful as nanoprobes for magnetic force microscopy.
Abstract High strength and high ductility are often mutually exclusive properties for structural metallic materials. This is particularly important aluminum (Al)-based alloys which widely commercially employed. Here, we introduce a hierarchical nanostructured Al alloy with structure of nanograins surrounded by nano-sized glass (MG) shells. It achieves an ultrahigh yield 1.2 GPa in tension (1.7 compression) along 15% plasticity (over 70% compression). The MG phase facilitates such impeding...
An editable asymmetric all-solid-state supercapacitors based on 2D-MOF/rGO papers were constructed.