Parametric Investigation on laser annealing of polyimide on improving the characteristics of NiTi SMA-based bimorph towards the development of microactuators

Gangwar, Kaushal; Gupta, Dhruv; Anand, Palani Iyamperumal

doi:10.1016/j.sna.2023.114536

Cited by 6 publications

(6 citation statements)

References 36 publications

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“…The peaks at 16.6°and 22.4°originate from the PI film and are associated with the average interchain distance and amorphous structure, respectively. 35,36 The sharp diffraction peak at 5.6°can be ascribed to the (110) plane of COF300 and indicates the highly periodic structure of COF300. 33 The inserted image in Figure 3b shows the space-filling model of the crystal structure along the [001] direction, 32 indicating that COF300 exhibits pore sizes of approximately 7.8 Å within its channels.…”

Section: Resultsmentioning

confidence: 99%

Covalent Organic Framework-Coated Polyimide Ion-Track-Etched Separator with High Thermal Stability for Developing Lithium-Ion Batteries with Long Lifespans

Liu,

Cao,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Separators play a crucial role in inhibiting thermal runaway in lithium-ion batteries (LIBs). In this study, the doctor blade coating method and heavy-ion track etching technology were used to prepare a polyimide-based covalent organic framework (PI_COF) separator with excellent thermal stability and a long cycle life. Specifically, COF300 was simply coated on the surface of a polyimide-based track-etched membrane (PI_TEM) with straight through holes, which provided a rigid framework and high-temperature stability at 300 °C. These features were conducive to inhibiting thermal runaway, while porous COF300 with large holes increased the wettability of the electrolyte, facilitating lithium-ion migration and suppression of lithium dendrite growth; consequently, LIBs with an excellent cycling performance and a high rate capacity were obtained. The cell with the PI_COF separator delivered a high capacity of 90.0 mA h g −1 after 1000 cycles. The PI_COF separator with high thermal stability exhibited a long cycle life in LIBs. These features are beneficial for improving the safety characteristics of LIBs as well as for accelerating the practical application process of the PI_COF separator.

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Section: Resultsmentioning

confidence: 99%

Covalent Organic Framework-Coated Polyimide Ion-Track-Etched Separator with High Thermal Stability for Developing Lithium-Ion Batteries with Long Lifespans

Liu,

Cao,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…The form memory effect in the material is stabilized by further heating and cooling cycles [74]. The application of laser annealing to polyimide improves the properties of the NiTi shape memory alloy (SMA) bimorph, namely in terms of actuation and the adhesion between the substrate and the film [75]. The final phase entails machining, surface treatment, and other finishing operations to get the appropriate form, dimensions, and surface quality for the shape memory alloy component.…”

Section: Powder Metallurgy Processingmentioning

confidence: 99%

Processing of shape memory alloys research, applications and opportunities: a review

Mehta,

Singh,

Vasudev

2024

Phys. Scr.

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Shape Memory Alloys (SMAs) are metallic materials with unique thermomechanical characteristics that can regain their original shape after deformation. SMAs can be used in various industries such as consumer electronics, automobile parts, aircraft components, and biomedical devices. In this paper, we review the current state of the art of SMA fabrication and their application in the aerospace, healthcare, and aerospace industries. Specifically, we focus on the influence of manganese (Mn) addition on Cu-Al-Ni shape memory alloys' structure, mechanical characteristics, and corrosion behavior, focusing on the incorporation of small and medium-sized enterprises (SMEs) in the analysis of cu-aluminum alloys. This study explores the integration of SME and superelasticity, critical phenomena in SMA behavior, and can be utilized to develop and evaluate SMA-based devices and structures, as well as to understand the mechanism behind SMA actuation and develop improved materials. FEM simulations are crucial for optimizing designs and enhancing performance in sectors like aerospace and healthcare. FEM simulations can also be used to predict the stress and strain of SMA-based devices and structures. This can help to reduce cost, improve efficiency, and reduce the risk of failure. Additionally, FEM simulations can help to identify potential weaknesses in SMA-based designs and suggest modifications or improvements.

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“…It is important to note that these three paraments of transmission are dependent on the frequency of operation, the capacitance The magnetic, piezoelectric, electrothermal, and SMA mechanisms offer distinct advantages in addressing actuation voltage challenges in MEMS switches [39]. Magnetic mechanisms utilize efficient magnetic forces, allowing for low-actuation voltages and precise control [40]. Piezoelectric mechanisms leverage materials that generate electrical charges under mechanical stress, providing energy-efficient actuation at lower voltages [41].…”

Section: Transmission Performancementioning

confidence: 99%

MEMS Switch Realities: Addressing Challenges and Pioneering Solutions

Kurmendra,

Agarwal

2024

Micromachines

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Micro-Electro-Mechanical System (MEMS) switches have emerged as pivotal components in the realm of miniature electronic devices, promising unprecedented advancements in size, power consumption, and versatility. This literature review paper meticulously examines the key issues and challenges encountered in the development and application of MEMS switches. The comprehensive survey encompasses critical aspects such as material selection, fabrication intricacies, performance metrics including switching time and reliability, and the impact of these switches on diverse technological domains. The review critically analyzes the influence of design parameters, actuation mechanisms, and material properties on the performance of MEMS switches. Additionally, it explores recent advancements, breakthroughs, and innovative solutions proposed by researchers to address these challenges. The synthesis of the existing literature not only elucidates the current state of MEMS switch technology but also paves the way for future research avenues. The findings presented herein serve as a valuable resource for researchers, engineers, and technologists engaged in advancing MEMS switch technology, offering insights into the current landscape and guiding future endeavors in this rapidly evolving field.

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Parametric Investigation on laser annealing of polyimide on improving the characteristics of NiTi SMA-based bimorph towards the development of microactuators

Cited by 6 publications

References 36 publications

Covalent Organic Framework-Coated Polyimide Ion-Track-Etched Separator with High Thermal Stability for Developing Lithium-Ion Batteries with Long Lifespans

Covalent Organic Framework-Coated Polyimide Ion-Track-Etched Separator with High Thermal Stability for Developing Lithium-Ion Batteries with Long Lifespans

Processing of shape memory alloys research, applications and opportunities: a review

MEMS Switch Realities: Addressing Challenges and Pioneering Solutions

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