Development of new shape memory alloys-Alloy design and process-

新型形状记忆合金的开发-合金设计与工艺-

• 批准号: 20360342
• 负责人: OIKAWA Katsunari
• 金额: $ 12.4万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360342/
• 关键词: 形状記憶合金; 結晶成長; 強磁性; 高温; 強磁性形状記憶合; マルテンサイト変態; 磁歪; 単結晶; 強磁性形状記憶合金

Ni-Fe-Ga alloys and Ni-Fe-Ga-Co alloys have been received great attention as ferromagnetic shape memory alloys and high temperature alloys. In this study, the fiber shape single crystals of these alloys were prepared by the micro-pulling-down method. Optimum conditions for the crystal growth and the solidification behavior and physical properties of them were investigated. As the results, the single crystal wires approximately 1-3 mm in diameter and 200 mm in length could be grown by 10 mm/min. pulling-down-rate. The effective distribution coefficient of them approximately unit, suggesting that the macroscopic segregation are very small. The stresstemperature phase diagram shows that the martensitic phase transformation behavior showed the Clausius-Clapeyron relation.

Ni-Fe-Ga合金和Ni-Fe-Ga-Co合金作为铁磁形状记忆合金和高温合金受到了极大的关注。在这项研究中，这些合金的纤维状单晶是通过微下拉法制备的。研究了晶体生长的最佳条件及其凝固行为和物理性能。结果，可以以10毫米/分钟的速度生长直径约1-3毫米、长度200毫米的单晶线。下拉率。它们的有效分配系数近似为单位，表明宏观偏析很小。应力-温度相图显示马氏体相变行为符合Clausius-Clapeyron关系。

项目成果

Macroscopic pattern formation preceding martensitic transformation in an ferromagnetic shape memory alloy Ni51Fe22Ga27

铁磁形状记忆合金 Ni51Fe22Ga27 马氏体转变前的宏观图案形成

• 发表时间: 2008
• 期刊: Appl. Phys. Lett
• 作者: Y. Murakami;D. Shindo;R. Kainuma;K. Oikawa;K. Ishida
• 通讯作者: K. Ishida

Elastic and superelastic properties of NiFeCoGa fiber grown by micro-pulling down method

微下拉法生长NiFeCoGa纤维的弹性和超弹性性能

• 发表时间: 2009
• 期刊: Mater. Trans
• 作者: K. Oikawa;R. Saito;K. Anzai;H. Ishikawa;Y. Sutou;T. Omori;A. Yoshikawa;V. A. Chernenko;S. Besseghini;A. Gambardella;R. Kainuma and K. Ishida
• 通讯作者: R. Kainuma and K. Ishida

Elucidation of microstructures produced in Ni51Fe22Ga27 ferromagnetic shpe memory alloy

Ni51Fe22Ga27 铁磁形状记忆合金微观结构的阐明

• 发表时间: 2010
• 期刊: Journal of Applied Physocs 107
• 作者: Y.Murakami;他
• 通讯作者: 他

Phase transformations in the B2 phase of Co-rich binary alloys

富Co二元合金B2相的相变

• 发表时间: 2011
• 期刊: J. Alloy Comp.
• 作者: K. Niitsu;T. Omori;M. Nagasako;K. Oikawa;R. Kainuma and K. Ishida
• 通讯作者: R. Kainuma and K. Ishida

Properties of Co-alloyed Ni-Fe-Ga Ferromagnetic Shape Memory Alloys

• DOI: 10.1007/s11665-009-9425-7
• 发表时间: 2009-08-01
• 期刊: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
• 影响因子: 2.3
• 作者: Chernenko, V. A.;Oikawa, K.;Ishida, K.
• 通讯作者: Ishida, K.