...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Elastocaloric effects related to B2 <-> R and B2 <-> B19 ' martensite transformations in nanocrystalline Ni50.5Ti49.5 microwires
【24h】

Elastocaloric effects related to B2 <-> R and B2 <-> B19 ' martensite transformations in nanocrystalline Ni50.5Ti49.5 microwires

机译：纳米晶体Ni50.5.5微小的B2 < - > R和B2 < - > B19'马氏体转化有关的弹性焦效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Nanocrystalline NiTi microwires exhibit stable superelastic effect and are highly potential as elastocaloric materials. Here, nanocrystalline Ni50.5Ti49.5 microwires of diameter 109 mu m were prepared by multi-step cold-drawn and the elastocaloric effect (eCE) by taking the advantage of B2 <-> R and B2 <-> B19' transformations have been investigated. Both transitions in the nanocrystalline microwires displayed comparable or even superior caloric effect compared to other elastocaloric and magnetocaloric materials. The B2 <-> B19' transformation exhibited larger stress-induced entropy change (Delta S = similar to 65 J/kg.K) within a wider operation temperature window (Delta T-win = similar to 90 K) compared to B2 <-> R transition (Delta S = similar to 18 J/kg.K with Delta Twin = 12 K). However, the hysteresis for B2 <-> R transition (Delta T-hys < 10 K) was much smaller than that for B2 <-> B19' transition (Delta T-hys > 50 K) thanks to the smaller transition strain in the latter case. As a result, eCE produced by B2 <-> R tranistion possessed a more stable cyclic stability. Therefore, both B2 <-> R and B2 <-> B19' transitions in the present microwires are promising candidates in the micro-sized refrigeration field. (C) 2019 Elsevier B.V. All rights reserved.
机译：纳米晶体NITI微线表现出稳定的超弹性效果，并且是弹性材料的高潜力。这里，通过使用多步冷拉伸和弹性致作用（ECE）来制备直径为109μm的纳米晶体Ni50.50.5。通过B2 < - > R和B2-> B19'转化的优点，制备调查。与其他弹性蜂制物和磁热材料相比，纳米晶微线中的过渡显示出可比或甚至卓越的热量效果。与B2相比，B2 < - > B19'转换在更宽的操作温度窗口（Delta T-Win =类似于90 k）中，较大的应力诱导的熵变化（ΔS=类似于65J / kg.k），与B2 < - > R转换（Delta S =与18 j / kg.k相似，具有delta双单= 12 k）。然而，由于较小的过渡应变，B2 - B19'转变（Delta T-Hys <10k）的滞后（Delta T-Hys <10k）的滞后远小于B2 < - > B19'过渡（Delta T-Hys> 50k）。后一种情况。结果，由B2 < - > R Tranistion产生的ECE具有更稳定的循环稳定性。因此，本微量线中的B2 < - > R和B2 < - > B19'的转变是微尺寸制冷场中的候选者。 （c）2019 Elsevier B.v.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号