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Ni–Ti–Cu–V合金 1

四元合金 1

属性映射 1

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形状记忆合金 1

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热弹性冷却 1

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组合材料科学 1

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A hot future for cool materials

《能源前沿（英文）》 2023年第17卷第4期页码 447-449 doi: 10.1007/s11708-022-0854-4

摘要： The widespread need to pump heat necessitates improvements that will increase energy efficiency and, more generally, reduce environmental impact. As discussed at the recent Calorics 2022 Conference, heat-pump devices based on caloric materials offer an intriguing alternative to gas combustion and vapor compression.

关键词： magnetocaloric electrocaloric mechanocaloric elastocaloric barocaloric

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A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

《能源前沿（英文）》 2023年第17卷第4期页码 504-515 doi: 10.1007/s11708-022-0855-3

摘要： Thermal energy storage has been a pivotal technology to fill the gap between energy demands and energy supplies. As a solid-solid phase change material, shape-memory alloys (SMAs) have the inherent advantages of leakage free, no encapsulation, negligible volume variation, as well as superior energy storage properties such as high thermal conductivity (compared with ice and paraffin) and volumetric energy density, making them excellent thermal energy storage materials. Considering these characteristics, the design of the shape-memory alloy based the cold thermal energy storage system for precooling car seat application is introduced in this paper based on the proposed shape-memory alloy-based cold thermal energy storage cycle. The simulation results show that the minimum temperature of the metal boss under the seat reaches 26.2 °C at 9.85 s, which is reduced by 9.8 °C, and the energy storage efficiency of the device is 66%. The influence of initial temperature, elastocaloric materials, and the shape-memory alloy geometry scheme on the performance of car seat cold thermal energy storage devices is also discussed. Since SMAs are both solid-state refrigerants and thermal energy storage materials, hopefully the proposed concept can promote the development of more promising shape-memory alloy-based cold and hot thermal energy storage devices.

关键词： shape-memory alloy (SMA) elastocaloric effect (eCE) cooled seat cold thermal energy storage

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Ni-Ti-Cu-V四元薄膜库中微观结构和相变的组合合成和高通量表征 Article

Naila M. Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

《工程（英文）》 2020年第6卷第6期页码 637-643 doi: 10.1016/j.eng.2020.05.003

摘要：

过去70年来，基于Ni-Ti的形状记忆合金（shape memory alloy, SMA）已得到广泛使用，但是提高其功能稳定性仍然是实现更稳健和更高级应用的关键。SMA因其能够通过可逆的马氏体转变来保持加工后的形状而得名，它对成分的变化非常敏感。因此，用三元和四元元素合金化来微调SMA 的晶格参数和热滞，成为材料研究中的一个难题。组合材料科学允许从多种表征技术中简化合成过程和数据管理。本研究采用磁控溅射的方法，在热氧化的硅晶片上制备了具有成分分布的Ni-TiCu-V薄膜库。使用高通量波长色散光谱、同步加速器X射线衍射和温度相关的电阻，测量研究并确定了成分相关的相变温度和微观结构。在材料库的177种成分中，有32种成分具有形状记忆效应，其中5种成分具有零或接近零的热滞效应。应用中，这些合金成分在给定工作温度范围内提供了选择的灵活性。结合薄膜库的局部微观结构和组成，讨论了四元体系的相图和功能特性的相关性。

关键词： Ni–Ti–Cu–V合金组合材料科学四元合金形状记忆合金薄膜库弹性冷却热弹性冷却相变高通量表征属性映射机器学习