Results 121 to 130 of about 20,042,377 (298)

Surface Integrity Characteristics of NiTiHf High Temperature Shape Memory Alloys

, 2019
This present study focuses on the surface integrity characteristics of the machined NiTiHf high temperature shape memory alloys. The NiTiHf specimens were machined under dry, minimum quantity lubrication (MQL) and cryogenic cooling at two different cutting speeds.
Yusuf Kaynak, Emre Tascioglu, Othmane Benafan   +2 more
openaire   +3 more sources

Disorder‐Broadened Topological Hall Phase and Anomalous Hall Scaling in FeGe

Advanced Functional Materials, EarlyView.
By systematically introducing defects into FeGe via ion‐beam modification, we demonstrate that disorder broadens the temperature regime over which the topological Hall effect ‐ a signature of skyrmions or other chiral textures — appears, while also increasing its magnitude.
Chaman Gupta, Chris Matsumura, Hongbin Yang, Sarah Edwards, Rebeca M. Gurrola, Jiun‐Haw Chu, Hanjong Paik, Yongqiang Wang, David A. Muller, Robert Streubel, Tzu‐Ming Lu, Serena Eley   +11 more
wiley   +1 more source

Introduction to High-Temperature Shape Memory Alloys and Their Applications

High-temperature shape memory alloys (HTSMAs) are a class of developed functional materials that exhibit the distinctive thermoelastic martensitic transformation behavior of conventional shape memory alloys (SMAs) while showing stability at high temperatures. Their potential to regain large strains, give high actuation forces, and keep functionality in
Abid Hussain, Afzal Khan, Muhammad Imran Khan   +2 more
openaire   +1 more source

Discovery of Energy‐Localized Trap States via Opto‐Electrical Spectroscopy in UWBG Perovskite La:SrSnO3 FETs

Advanced Functional Materials, EarlyView.
Combined UV–vis transmittance and wavelength‐dependent photo‐assisted DC I–V analyses reveal defect‐induced optical instability and a high density of deep donor‐like subgap traps in La‐doped SrSnO3. The resulting MOSFET achieves one of the highest on/off ratios reported for ABO3 perovskite devices, demonstrating the promise of stannate perovskites as ...
Sojin Jung, Junghyun Koo, Hongseung Lee, Donghwan Kim, Dongho Won, Weideng Sun, Jaewook Yoo, Minah Park, Seohyeon Park, Seongbin Lim, Joonsung Lee, Sungjune Park, Sangmoon Yoon, Tae Wan Kim, Bharat Jalan, Gang Qiu, Kiyoung Lee, Hagyoul Bae   +17 more
wiley   +1 more source

A novel magnetorheological clutch with variable gap controlled by shape memory alloy

Advances in Mechanical Engineering
To address the issue of reduced transmission performance of magnetorheological clutches at high temperatures, a novel magnetorheological clutch with a variable working gap controlled by shape memory alloy springs is proposed. By utilizing the compression
Jianzuo Ma, Tian Fu, Baisen Zhao, Hang Gong   +3 more
doaj   +1 more source

Emerging Post‐CMOS Hardware Neurons for Brain‐Inspired Computing: Devices, Circuits, and System Integration

Advanced Functional Materials, EarlyView.
The physical realization of artificial neurons is a critical challenge for energy‐efficient neuromorphic computing. This review presents a comprehensive analysis of the evolution of artificial neuron implementations from conventional CMOS to emerging post‐CMOS technologies.
Kannan Udaya Mohanan, Hocheon Yoo, Benoît H. Lessard, Ioannis Kymissis, Chang‐Hyun Kim   +4 more
wiley   +1 more source

Multi‐Level Saturation Current Encoding in Two‐Dimensional Ferroelectric Source‐Gated Transistors

Advanced Functional Materials, EarlyView.
A 2D ferroelectric source‐gated transistor (SGT) operates with a non‐volatile, multi‐level saturation current controlled by ferroelectric polarization. Operando electrostatic and photocurrent imaging link the current limitation to source‐side depletion, identifying saturation current as a programmable, read‐bias‐tolerant device parameter toward low ...
Joon‐Seok Kim, Ting‐Ching Chu, Zhehao Zhu, Lincoln J. Lauhon   +3 more
wiley   +1 more source

Superelasticity and elastocaloric effect of NiTiNb shape memory alloys over a wide working temperature window

Journal of Materials Research and Technology
Solid-state refrigeration based on the elastocaloric effect is a promising alternative to conventional vapor-compression refrigeration technology due to its environmental friendliness and high energy efficiency.
Bailiang Qin, Ze Pu, Changyong Chen, Yongyun Zhang, K.C. Chan   +4 more
doaj   +1 more source

Unified Phase‐Field Framework for Antiferroelectric, Ferroelectric and Dielectric Phases: Application to HZO Thin Films

Advanced Functional Materials, EarlyView.
HfxZr1−xO2${\rm Hf}_x{\rm Zr}_{1-x}{\rm O}_2$ offers CMOS‐compatible nanoscale ferroelectricity yet suffers from a high Ec${\rm E}_c$ demanding large operating voltages. A unified phase‐field framework spanning AFE/FE/DE phases shows how FE grains soften neighboring AFE grains over λ$\lambda$ ≈$\approx$ 22–37 nm.
P. Pankaj, Sandeep Sugathan, Jiyoung Kim, Si Joon Kim, Pil‐Ryung Cha   +4 more
wiley   +1 more source

Microstructure and transformation related behaviors of a Ni45.3Ti29.7Hf20Cu5 high temperature shape memory alloy

, 2015
Effects of heat treatment temperature and time on the microstructure and shape memory behaviors (e.g. transformation temperatures, load-biased shape memory effect, superelasticity, two-way shape memory effect, and related properties) were investigated in
Noebe, R. D., CHUMLYAKOV, Yi., Maier, Hans Jürgen, Acar, E., Ded, G., Kok, M., Karaca, H. E., Acar, Emre, Tobe, H., MAIER, H. J., Saghaian, S. M., Saghaian, Sayed M., Noebe, Ronald D., Karaca, Haluk E., Basaran, B., Chumlyakov, Yuri I., Ded, G. S.   +16 more
core   +1 more source