A5049594942- Electronic Packaging and Soldering Technologies
- Silicon Carbide Semiconductor Technologies
- Aluminum Alloys Composites Properties
- 3D IC and TSV technologies
- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Electromagnetic Compatibility and Noise Suppression
- Intermetallics and Advanced Alloy Properties
- Silicon and Solar Cell Technologies
- Laser and Thermal Forming Techniques
- Advanced materials and composites
- Advanced ceramic materials synthesis
- Urban Heat Island Mitigation
- GaN-based semiconductor devices and materials
- Aluminum Alloy Microstructure Properties
- Remote Sensing and Land Use
- Titanium Alloys Microstructure and Properties
- Urban Green Space and Health
- Power Systems Fault Detection
- Synthetic Organic Chemistry Methods
- Gas Sensing Nanomaterials and Sensors
- Advanced DC-DC Converters
- Simulation and Modeling Applications
- Multilevel Inverters and Converters
- Electrostatic Discharge in Electronics
Shanghai Institute of Technology
2017-2024
Jilin Normal University
2024
Shanghai Institute of Organic Chemistry
2023-2024
Harbin Institute of Technology
2019-2024
Affiliated Hospital of Southwest Medical University
2024
Southwest Medical University
2022-2024
University of Chinese Academy of Sciences
2023-2024
Zhejiang University
2022
Jönköping University
2022
Sun Yat-sen University
2022
This paper presents a series of experiment results on the ageing effects cyclic junction temperature variations (ΔT <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">j</sub> ) low amplitudes in power modules, to help capturing module reliability characteristics and derivation lifetime models future. Power cycling tests, for nonaged aged are designed illustrate failure mechanisms. Insulated gate bipolar transistor (IGBT) modules actual converters...
Chiral trisubstituted vicinal diols are a type of important organic compounds, serving as both common structure units in bioactive natural products and chiral auxiliaries asymmetric synthesis. Herein, by using siloxypropadienes the precursors allyl copper(I) species, copper(I)-catalyzed diastereoselective enantioselective reductive allylation ketones was achieved, providing syn-diols anti-diols good to excellent enantioselectivity. DFT calculations show that cis-γ-siloxy-allyl copper species...
In this article, the fatigue evolution of solder joints in a photovoltaic (PV) module at hot climate under thermomechanical cycling was evaluated. The finite-element modeling (FEM) simulation results showed that degradation is very sensitive to ambient temperature so with an increase from 25 °C 75 °C, life decreased by 34% for joints. A handy equation also given predict mentioned temperature. outcomes revealed layer thickness, improved, which due lower accumulated strain energy per volume...
With the depletion of fossil energy and increasingly serious environmental pollution, development renewable sources is imminent. Exploration high-efficiency storage transformation materials has become focus in field research. Covalent organic frameworks (COFs), as a kind porous crystalline polymer, have attracted extensive attention. In this work, we developed composite material (Al2O3-G-COFSO3) using COFs alumina, which can serve an efficient separator lithium–sulfur (Li–S) batteries....
The currently available high-power laser presents significant opportunities for welding of thick section components in single-pass. However, weld defects frequently occur and depth penetration is usually lower than expected this situation. In work, a process under reduced ambient pressure was investigated to achieve single-pass complete-joint-penetration 20 mm-thick high-strength steel. An experimental theoretical program investigation undertaken evaluate the characteristic process....
The currently available high-power laser shows promising opportunities for the welding of thick plates in a single pass. However, weld-root defect frequently occurs when is used to join full-penetration mode, which has significantly adverse effect on serviceability weld joint. purpose this work understand formation mechanism and reduce these defects through controlling parameters. In study, characteristics root were investigated using 10 kW fiber program experiment theoretical analysis....
In this work, the asymmetric weld fusion geometry in oscillating laser beam welding (OLBW) of aluminium alloy was reported and investigated using a numerical approach. A multi-physics heat transfer fluid flow model OLBW developed validated with corresponding experimental results. The geometry, temperature fields, behaviours for four commonly used oscillation modes, line, circle, eight, infinity, were calculated to analyse origin geometry. results show asymmetry local input along travelling...
The realization of brazing between the TiZrTaHfNb refractory high-entropy alloy (RHEA) and zirconia (ZrO2) ceramic is great importance in expanding application metal-ceramic composite parts. In this study, reliable brazed joints were achieved using a Ti–28Ni eutectic filler. typical interfacial microstructure effect temperature on mechanical properties thoroughly discussed. results indicated formation complex oxides ZrO2 side, including Ti2O, Ni2Ti4O (Hf, Ta, Zr)O2. Additionally, RHEA...
Solder layers are highly important parts of the IGBT module which establish internal electrical connections, mechanical support and cooling channel module. The function is deeply dependent on reliability solder layers. A Finite Element (FE) model based actual Insulated Gate Bipolar Transistor (IGBT) established to analyze how temperature levels power cycling load influence fatigue life layer. 42 loads were designed with different profiles, simulation results found that increase junction...
Ti4Al6V and 6061 Al dissimilar metals were butt welded by the laser oscillating welding method. The effects of offset, oscillation frequency, energy distribution on formation, microstructure, tensile properties metal joints are discussed in detail. experimental results show that Ti6Al4V was micro melted with a offset 1.1 mm, large number intermetallic compounds (IMCs) formed side Ti6Al4V. Additionally, there some porosity defects fusion zone (FZ) due to an inappropriate frequency. When...
Using construction waste materials as substrates can reduce the resource consumption of minerals and provide sustainability benefits in green roofs. This research examined viability crushed bricks concrete with varying particle sizes by conducting a simulated drought experiment roof experiment. Six composite were prepared, respectively, mixing peat small-, medium-, large-sized particles (peat-to-inorganic-particle volume ratio 1:2). The properties each group within acceptable parameters,...
After ischemic stroke (IS), secondary injury is intimately linked to endoplasmic reticulum (ER) stress and body-brain crosstalk. Nonetheless, the underlying mechanism systemic immune disorder mediated ER in human IS remains unknown. In this study, 32 candidate stress-related genes (ERSRGs) were identified by overlapping MSigDB pathway DEGs. Three Key ERSRGs (ATF6, DDIT3 ERP29) using LASSO, random forest, SVM-RFE. patients with different profile clustered into two groups consensus clustering...