| 论文标题 |
Fatigue-resistant high-performance elastocaloric materials made by additive manufacturing |
| 作者 |
H. Hou, E. Simsek, T. Ma, N. S. Johnson, S. Qian, et al. |
| 发表/完成日期 |
2019-11-30 |
| 期刊名称 |
Science |
| 期卷 |
366 |
| 相关文章 |
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| 论文简介 |
Elastocaloric cooling, a solid-state cooling technology, exploits the latent heat released and absorbed by
stress-induced phase transformations. Hysteresis associated with transformation, however, is
detrimental to efficient energy conversion and functional durability. We have created thermodynamically
efficient, low-hysteresis elastocaloric cooling materials by means of additive manufacturing of nickeltitanium.
The use of a localized molten environment and near-eutectic mixing of elemental powders has
led to the formation of nanocomposite microstructures composed of a nickel-rich intermetallic
compound interspersed among a binary alloy matrix. The microstructure allowed extremely small
hysteresis in quasi-linear stress-strain behaviors—enhancing the materials efficiency by a factor of four
to seven—and repeatable elastocaloric performance over 1 million cycles. Implementing additive
manufacturing to elastocaloric cooling materials enables distinct microstructure control of highperformance
metallic refrigerants with long fatigue life. |
(创新港)
