scholarly journals Room Temperature Phosphorescent (RTP) Thermoplastic Elastomers with Dual and Variable RTP Emission, Photo‐Patterning Memory Effect, and Dynamic Deformation RTP Response

2021 ◽  
pp. 2103402
Author(s):  
Yuefa Zhang ◽  
Qikun Sun ◽  
Lingtai Yue ◽  
Yaguang Wang ◽  
Shuaiwei Cui ◽  
...  
Keyword(s):  
Memory Effect ◽  
Room Temperature ◽  
Dynamic Deformation ◽  
Thermoplastic Elastomers

High performance shape memory effect in nitinol wire for actuators with increased operating temperature range

2014 ◽  
Vol 07 (05) ◽  
pp. 1450063 ◽  
Author(s):  
Riccardo Casati ◽  
Carlo Alberto Biffi ◽  
Maurizio Vedani ◽  
Ausonio Tuissi
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
High Performance ◽  
Room Temperature ◽  
Operating Temperature ◽  
Niti Wire ◽  
Shape Memory Actuators ◽  
Nitinol Wire ◽  
Operating Temperature Range

In this research, the high performance shape memory effect (HP-SME) is experimented on a shape memory NiTi wire, with austenite finish temperature higher than room temperature. The HP-SME consists in the thermal cycling of stress induced martensite and it allows achieving mechanical work higher than that produced by conventional shape memory actuators based on the heating/cooling of detwinned martensite. The Nitinol wire was able to recover about 5.5% of deformation under a stress of 600 MPa and to withstand about 5000 cycles before failure. HP-SME path increased the operating temperature of the shape memory actuator wire. Functioning temperatures higher than 100°C was reached.

Cold Bending a Ni-Ti Shape Memory Alloy Wire

2015 ◽  
Vol 661 ◽  
pp. 98-104 ◽  
Author(s):  
Kuang-Jau Fann ◽  
Pao Min Huang
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Room Temperature ◽  
Aging Treatment ◽  
Treatment Temperature ◽  
Bending Test ◽  
Solution Treatment Temperature

Because of being in possession of shape memory effect and superelasticity, Ni-Ti shape memory alloys have earned more intense gaze on the next generation applications. Conventionally, Ni-Ti shape memory alloys are manufactured by hot forming and constraint aging, which need a capital-intensive investment. To have a cost benefit getting rid of plenty of die sets, this study is aimed to form Ni-Ti shape memory alloys at room temperature and to age them at elevated temperature without any die sets. In this study, starting with solution treatments at various temperatures, which served as annealing process, Ni-rich Ni-Ti shape memory alloy wires were bent by V-shaped punches in different curvatures at room temperature. Subsequently, the wires were aged at different temperatures to have shape memory effect. As a result, springback was found after withdrawing the bending punch and further after the aging treatment as well. A higher solution treatment temperature or a smaller bending radius leads to a smaller springback, while a higher aging treatment temperature made a larger springback. This springback may be compensated by bending the wires in further larger curvatures to keep the shape accuracy as designed. To explore the shape memory effect, a reverse bending test was performed. It shows that all bent wires after aging had a shape recovery rate above 96.3% on average.

Strong memory effect at room temperature in nanostructured granular alloy Co0.3Cu0.7

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 95695-95702 ◽  
Author(s):  
S. Dhara ◽  
R. Roy Chowdhury ◽  
B. Bandyopadhyay
Keyword(s):  
Temperature Distribution ◽  
Memory Effect ◽  
Room Temperature ◽  
Blocking Temperature ◽  
Magnetic Memory

Non-interacting magnetic CoCu nanoparticles with a blocking temperature distribution show strong magnetic memory effect even at room temperature.

Magnetic memory effect at room temperature in exchange coupled NiFe2O4-NiO nanogranular system

2017 ◽  
Vol 111 (18) ◽  
pp. 182406 ◽  
Author(s):  
Zhaoming Tian ◽  
Longmeng Xu ◽  
Yuxia Gao ◽  
Songliu Yuan ◽  
Zhengcai Xia
Keyword(s):  
Memory Effect ◽  
Room Temperature ◽  
Magnetic Memory

Field pulse induced magnetic memory effect at room temperature in exchange coupled NiFe2O4/NiO nanocomposites

2019 ◽  
Vol 469 ◽  
pp. 504-509 ◽  
Author(s):  
Longmeng Xu ◽  
Yuxia Gao ◽  
Ashtar Malik ◽  
Yong Liu ◽  
Gaoshang Gong ◽  
...  
Keyword(s):  
Memory Effect ◽  
Room Temperature ◽  
Magnetic Memory ◽  
Field Pulse

Surface-spin driven room temperature magnetic memory effect in Fe-substituted NiO nanoparticles

2021 ◽  
Vol 536 ◽  
pp. 147856
Author(s):  
Ashish Chhaganlal Gandhi ◽  
Hsin-Hao Chiu ◽  
Kuan-Ting Wu ◽  
Chia-Liang Cheng ◽  
Sheng Yun Wu
Keyword(s):  
Memory Effect ◽  
Room Temperature ◽  
Magnetic Memory ◽  
Nio Nanoparticles ◽  
Surface Spin

Unstable Luminescence and "Memory Effect" in Nitrides Irradiated by Electron Beam

2013 ◽  
Vol 205-206 ◽  
pp. 435-440
Author(s):  
Yana V. Kuznetsova ◽  
Maria V. Zamoryanskaya
Keyword(s):  
Electron Beam ◽  
Memory Effect ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Beam Irradiation

In this paper the effect of unstable luminescence in nitrides was studied, notably the phenomena of cathodoluminescent intensity rising under stationery electron beam irradiation with typical times of tens up to hundreds of seconds. Long-lasting impact by electron beam leads to changes of cathodoluminescence properties of irradiated area. The changes still remain even after keeping structures at room temperature for several days. Reversibility of this "memory effect" was examined. A model of effect observed was proposed and experimentally verified.

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