Results 101 to 110 of about 20,042,377 (298)

Study on properties of pre-alloy powder of TiNiHf high temperature shape memory alloy for additive manufacturing by preheating treatment

Journal of Materials Research and Technology
In this work, pre-alloyed powder high-temperature shape memory alloy (Ti30Ni50Hf20) for additive manufacturing was preheated at 300–800 °C and thermoscycled at 650 °C to examine the influence of preheating temperature and thermal cycle number on the ...
M.C. Jiang, X.Y. Yang, M.C. Zhang, D.C. Ren, H.F. Nurly, Y. Liu, Y.S. Cai, H.B. Ji, J.F. Lei   +8 more
doaj   +1 more source

Noise‐Limited Bit Precision in Ferroelectric Synaptic Transistors for High‐Resolution Neuromorphic Computing

Advanced Functional Materials, EarlyView.
Low‐frequency noise spectroscopy defines the resolvable conductance states of synaptic FeFETs by coupling read‐current fluctuation with usable dynamic range. The resulting noise‐limited bit precision establishes a universal, device‐agnostic reliability metric beyond the memory window, enabling quantitative benchmarking and rational design of high ...
Jaehong Park, Yeonseop Shin, Changhyeon Han, Sangwoo Kim, Eunchan Park, Youngchan Cho, Jaehong Min, Hyunjun Ahn, Jaekyoung Park, Cheol‐Woong Yang, Jangsaeng Kim, Daewoong Kwon, Wonjun Shin   +12 more
wiley   +1 more source

Thermo-mechanical description of phase transformation in Ni-Ti Shape Memory Alloy [PDF]

, 2011
The pseudo-elasticity of Shape Memory Alloys is due to a change in volumetric fraction between the high temperature phase (Austenite) and the low temperature phase (Martensite) under a mechanical loading.
Anne Maynadier, Olivier Hubert, Dorian Depriester, DEPRIESTER, Dorian, MAYNADIER, Anne, HUBERT, Olivier, LAVERNHE-TAILLARD, Karine, Karine Lavernhe-Taillard   +7 more
core   +1 more source

Two Coexisting Pathways to Volatility in Valence‐Change Memory Devices

Advanced Functional Materials, EarlyView.
Volatile VCM‐type memristive devices exhibit current relaxation after resistive switching, but their microscopic origin remains debated. Using pulsed measurements and a new Tunnel‐DLTS approach on Pt/SrTiO3/Nb:SrTiO3 devices, we show that post‐SET volatility is predominantly ionic, while electronic contributions—arising from quasi‐Fermi‐level ...
Johannes Hellwig, Clemens Wittberg, Dimitrios Spithouris, Regina Dittmann   +3 more
wiley   +1 more source

Structural phase transformations and shape memory effect in ZrCu along with Ni and Hf additions

MATEC Web of Conferences, 2015
Ni replacement of Cu in ZrCu high temperature shape memory alloy results in the increase of the temperatures of the martensitic transformation (MT) [1]. Once the Ni content reaches 20 at.%, the temperatures of MT are becoming higher than the temperature ...
Kosorukova Tetiana, Firstov Georgiy, Koval Yuri, Verhovlyuk Pavlo, Van Humbeeck Jan, Noel Henri   +5 more
doaj   +1 more source

Meniscus‐Guided Soft‐Lithographic Assembly of Grid‐Type Molecular Martensite Films for Single‐Crystal‐Like Actuation

Advanced Functional Materials, EarlyView.
A meniscus‐guided microtransfer molding strategy enables scalable fabrication of grid‐type molecular martensite films with b‐axis‐correlated preferential texture. Sequential growth across microchannel intersections creates structurally continuous grids and robust thermoelastic actuation (∼11% strain, > 50 cycles, maximum force density: 7.1 × 109 N m−3).
Sooyeon Ra, Sourabh R. Jagdale, Jin Hyeok Jang, Minwoo Jang, Kyoungtae Hwang, Taewoo Lee, Eun Hui Jeong, Soon Ho Yoon, Byung Joon Moon, Jangyup Son, Dong‐Su Lee, Sukang Bae, Jun Dong Park, Tae‐Wook Kim, Sangmin An, Sang Kyu Park   +15 more
wiley   +1 more source

Fabrication and Shape Memory Characteristics of Highly Porous Ti-Nb-Mo Biomaterials

Archives of Metallurgy and Materials, 2017
Non-toxic Ti-Nb-Mo scaffolds were fabricated by sintering rapidly solidified alloy fibers for biomedical applications. Microstructure and martensitic transformation behaviors of the porous scaffolds were investigated by means of differential scanning ...
Kim Y.-W., Mukarati T.W.
doaj   +1 more source

Effects of cold and warm rolling on the shape memory response of Ni50Ti30Hf20 high-temperature shape memory alloy

Acta Materialia, 2018
Abstract The present work reveals the effects of cold and warm rolling on the shape memory response and thermomechanical cyclic stability of Ni50Ti30Hf20 high-temperature shape memory alloy (HTSMA). Cold rolling without intermediate annealing was performed up to the maximum possible thickness reduction before surface cracks appeared.
N. Babacan, M. Bilal, C. Hayrettin, J. Liu, O. Benafan, I. Karaman   +5 more
openaire   +3 more sources

Temperature Memory Effect of Ti-Ni-Hf-Y High Temperature Shape Memory Alloy

, 2017
Temperature memory effect in the solution-treated Ti-Ni-Hf-Y high temperature shape memory alloy (HTSMA) was investigated. The results showed that the temperature memory effect induced by the partial cycling could be detected in the subsequent complete ...
Xiang Long Meng, Jun Li, Wei Hong Gao, Wen Long Song, Xiao Yang Yi   +4 more
core   +1 more source

Self‐Assembled Lipids as Soft Dielectrics

Advanced Functional Materials, EarlyView.
Self‐assembled lipid bilayers serve as soft dielectric materials for ultrathin electronics. Using liquid‐metal parallel‐plate junctions, the capacitance and dielectric breakdown of dehydrated lipid films are characterized. Dielectric behavior is controlled by lipid molecular structure, cholesterol content, and assembly conditions, providing molecular ...
Hao Yang, Yiding Li, Jitong Ren, Yu Shi, Charles M. Schroeder   +4 more
wiley   +1 more source