Results 61 to 70 of about 261,592 (260)

Superelastic High‐Entropy Oxide Ceramic Aerogels for Thermal Superinsulation and Sealing at Extreme Conditions

Advanced Science, EarlyView.
A high‐entropy oxide ceramic of (Gd1/2Lu1/2)2(Ti1/3Zr1/3Hf1/3)2O7 is prepared through a molecular synthesis route of pyrolytic solid‐solution reactions. The architectured nanofiber aerogel manifests unprecedented thermomechanical properties, including superelastic compressibility of 98% from −196 to 1500 °C, and thermal superinsulation capacity (24.14 ...
Xiaoke Jiang, Tao Du, Hengzhong Fan, Junhong Liu, Yunfeng Su, Peng He, Hongxiang Chen, Litian Hu, Yongsheng Zhang, Qiangqiang Zhang   +9 more
wiley   +1 more source

Roadmap for SiC power devices

Journal of Telecommunications and Information Technology, 2000
Silicon carbide (SiC) power devices offer significant benefits of improved efficiency, dynamic performance and reliability of electronic and electric systems.
Mietek Bakowski
doaj   +1 more source

Investigating Elastic Anisotropy of 4H-SiC Using Ultra-High Q Bulk Acoustic Wave Resonators

Journal of microelectromechanical systems, 2020
Hexagonal 4H-silicon carbide (4H-SiC) is a transversely isotropic substrate garnering interest for precision MEMS devices such as resonant gyroscopes.
Jeremy Yang, B. Hamelin, F. Ayazi
semanticscholar   +1 more source

An Elastocaloric Polymer with Ultra‐High Solid‐State Cooling via Defect Engineering

Advanced Science, EarlyView.
This work reports a defect‐engineering strategy that enables a record‐high adiabatic temperature change of up to 8.14 ± 1.76 °C in elastomers at an elevated temperature above 65 °C. Combined experimental and theoretical efforts reveal that increasing dangling‐chain defects nonmonotonically impacts the elastocaloric cooling performance of polymers due ...
Zhaohan Yu, Duo Xu, Zumrat Usmanova, Chuwei Ye, Aditya Swarnkar, Emma Scott, Sizhe Huang, Siyuan Rao, Xinyue Liu, Svetlana V. Boriskina, Ruobing Bai, Shaoting Lin   +11 more
wiley   +1 more source

Thermal Stability of Gate Driver Circuits Based on 4H-SiC MOSFETs at 300°C for High-Power Applications

IEEE Journal of the Electron Devices Society
The operation and reliability of gate driver circuits based on 4H-SiC MOSFETs at temperatures up to 300°C were reported. Due to the advantages of 4H-SiC MOSFETs, the driver circuit can overcome limitations in complicated circuit design and power ...
Vuong Van Cuong, Tatsuya Meguro, Seiji Ishikawa, Tomonori Maeda, Hiroshi Sezaki, Shin-Ichiro Kuroki   +5 more
doaj   +1 more source

Deformable Eutectic Alloy With Near‐Theoretical Yield Strength via Hierarchical Nanoscale Multiphases and Sessile Defects

Advanced Science, EarlyView.
A CoCrFeNiTa0.4 eutectic high‐entropy alloy achieves a near‐theoretical yield strength of 2.6 GPa with 13.6% plasticity. This breakthrough stems from a hierarchical nanostructure (FCC‐Laves lamellae with L12/D022 precipitates), which alleviates the inter‐phase modulus/hardness mismatch through synergistic strengthening and toughening, guiding the ...
Yusha Luo, Qianqian Wang, Bo Sun, Ruixin Sheng, Zhijun Guo, Gaopeng Zou, Zhe Jia, Yang Tong, Gang Sha, Peter K. Liaw, Baolong Shen   +10 more
wiley   +1 more source

Orientation‐Dependent Phase Transformation Pathways Enabling Superior Superelastic and Elastocaloric Performance of NiTi Alloys

Advanced Science, EarlyView.
By integrating simulations and experiments, the preferred (001) crystallographic texture promotes reversible martensite formation through variant selection, enhancing both superelastic and elastocaloric performance. This work provides fundamental guidelines for designing high‐efficiency NiTi‐based functional materials. Abstract Developing elastocaloric
Jiaqi Lu, Muhammad Aziz, Hao Li, Chi Zhang, Zhifeng Huang, Fei Chen   +5 more
wiley   +1 more source

Investigation into electrochemical oxidation behavior of 4H-SiC with varying anodizing conditions

Electrochemistry Communications, 2019
Electrochemical-assisted hybrid machining has been widely utilized for processing of single crystal SiC, which is a very promising next-generation semiconductor material for high power, high frequency and high temperature applications.
Zhaojie Chen, Yonghua Zhao
doaj   +1 more source

Incipient plasticity in 4H-SiC during quasistatic nanoindentation [PDF]

Journal of the Mechanical Behavior of Biomedical Materials, 2014
Silicon carbide (SiC) is an important orthopedic material due to its inert nature and superior mechanical and tribological properties. Some of the potential applications of silicon carbide include coating for stents to enhance hemocompatibility, coating for prosthetic-bearing surfaces and uncemented joint prosthetics. This study is the first to explore
Saurav Goel, Jiwang Yan, Xichun Luo, Anupam Agrawal   +3 more
openaire   +3 more sources

Topological Defects in Carbon Matrix Are Efficiently Constructed by Joule Thermal Shock for Catalyzing the Growth of Carbon Nanotubes

Advanced Science, EarlyView.
The Joule thermal shock technique ensures the efficient construction of topological defects in the carbon matrix because the instantaneous cooling suppresses the graphitization rearrangement of the heteroatom removal sites. This topological defect carbon can activate carbon source molecules by electron transfer, and further grow into carbon nanotubes ...
Bin Wang, Shizhen Dong, Guoan Xie, Yanling Yu, Nuoxin Wang, Huakun Liu, Xian Jian, Jinyang Li, Zuowan Zhou, Jianhui Qiu   +9 more
wiley   +1 more source