A5101900351- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Additive Manufacturing Materials and Processes
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- High Temperature Alloys and Creep
- Optical Network Technologies
- Advanced materials and composites
- Photonic Crystal and Fiber Optics
- Optical Wireless Communication Technologies
- Advanced Photonic Communication Systems
- Intermetallics and Advanced Alloy Properties
- Ferroelectric and Negative Capacitance Devices
- Advanced Photocatalysis Techniques
- Advanced Memory and Neural Computing
- Nanomaterials for catalytic reactions
- Photonic and Optical Devices
- Graphene research and applications
- Metal and Thin Film Mechanics
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- Welding Techniques and Residual Stresses
- Supercapacitor Materials and Fabrication
- Carbon Nanotubes in Composites
- Mechanical and Optical Resonators
University of Arizona
2018-2024
Industrial Technology Research Institute
2024
National Tsing Hua University
2015-2021
National University of Tainan
2020
Materials Research Center
2020
Feng Chia University
2018-2019
Advanced Imaging Research (United States)
2018
National Yang Ming Chiao Tung University
2014
Xi'an Jiaotong University
2014
University of Kentucky
2013
The microstructure and tensile property of Al0.2Co1.5CrFeNi1.5Ti0.3 high entropy alloy (HEA) processed by selective laser melting (SLM) have been studied in comparisons to that fabricated traditional cast & wrought (C&W) route. C&W samples were annealed then aged at 750 ℃ for 50 h promote precipitation strengthening L12 structured phase FCC matrix. By contrast, SLM directly from the as-built condition, which possessed sub-micron dendritic segregation, internal stress nano oxides; result was...
Although refractory high entropy alloys (RHEAs) have shown potentials to be developed as structural materials for elevated temperature applications, most of the reported oxidation behaviours RHEA were associated with short term exposures only up 48 hours, and there is a lack understanding on mechanism any to-date. In this work, by using thermogravimetric analysis, isothermal was conducted novel at 1000 °C 1100 200 which an unprecedented testing duration. The external oxide layer strongly...
Transitioning energy-intensive and environmentally intensive processes toward sustainable conditions is necessary in light of the current global condition. To this end, photocatalytic represent new approaches for H2 generation; however, their application tandem catalytic reactivity remains challenging. Here, we demonstrate that metal oxide materials decorated with noble nanoparticles advance visible activity reactions not typically driven by light. For this, Pd were deposited onto Cu2O cubes...
Abstract A hierarchical microstructure strengthened high entropy superalloy (HESA) with superior cost specific yield strength from room temperature up to 1,023 K is presented. By phase transformation pathway through metastability, HESA possesses a containing dispersion of nano size disordered FCC particles inside ordered L1 2 precipitates that are within the matrix. The average tensile could be 120 MPa higher than advanced single crystal superalloy, while still exhibit an elongation greater...
We examined fatigue-crack-growth behaviors of CoCrFeMnNi high-entropy alloys (HEAs) under as-fatigued and tensile-overloaded conditions using neutron-diffraction measurements coupled with diffraction peak-profile analyses. applied both high-resolution transmission electron microscopy (HRTEM) strain mapping for the complementary microstructure examinations. Immediately after a single tensile overload, crack-growth-retardation period was obtained by enhancing fatigue resistance, as compared to...
Abstract We applied Simmons–Balluffi methods, positron measurements, and neutron diffraction to estimate the vacancy of CoCrFeNi CoCrFeMnNi high-entropy alloys (HEAs) using Cu as a benchmark. The corresponding formation enthalpies associated entropies HEAs were calculated. vacancy-dependent effective free volumes in both are greater than those Cu, implying easier vacancies by lattice structure relaxation at elevated temperatures. Spatially resolved synchrotron X-ray measurements revealed...
A nanoindentation method is employed to measure the high temperature mechanical properties, including hardness H, Young's modulus E and fracture toughness K c , of 8YSZ (ZrO 2 +8 wt-%Y O 3 ) thermal barrier coatings (TBCs) under as sprayed condition after subjecting them oxidation. The tests are conducted on surfaces YSZ at temperatures 250 450°C. expressions for indentation H deduced analytically, influence testing oxidation discussed. An expression estimating also derived. estimated values...
In this paper, we propose and demonstrate a free space optical (FSO) communication system with 10 Gbit s−1 on-off keying traffic, which is integrated in passive network (PON) for broadcasting wireless data. After transmission distance of 25 km single-mode fiber length 6 m, the observed sensitivity FSO signal can reach −35.2 dBm within forward error correction level at bit ratio 3.8 × 10−3. Here, according to obtained results experiment simulation, support 2048 remote units (OWUs) access via...
Atomically precise graphene nanoribbons (GNRs) synthesized from the bottom-up exhibit promising electronic properties for high-performance field-effect transistors (FETs). The feasibility of fabricating FETs with GNRs (GNRFETs) has been demonstrated, ongoing efforts aimed at further improving their performance. However, long-term stability and reliability remain unexplored, which is as important performance practical applications. In this work, we fabricated short-channel nine-atom-wide...