Scholarlink

<p>Impact of partial substitution of Sn by Cu on the mechanical, electrical, and magnetic properties of Ni<sub>44</sub>Mn<sub>44</sub>Sn<sub>12</sub> Heusler alloys was analyzed in this study. The alloys Ni<sub>44</sub>Mn<sub>44</sub>Sn<sub>12</sub>, Ni<sub>44</sub>Mn<sub>44</sub>Sn<sub>10.5</sub>Cu<sub>1.5</sub>, and Ni<sub>44</sub>Mn<sub>44</sub>Sn<sub>9</sub>Cu<sub>3</sub> were produced through casting without atmosphere control and characterized using microscopy scanning electron microscopy, X-ray diffraction, Vickers microhardness tests, electrical resistivity measurements, and vibrating sample magnetometry. The results showed that the partial substitution of Sn with Cu did not affect the solidification microstructure or the phases present at room temperature. However, this substitution increased the transition temperatures from austenite to martensite and from martensite to austenite, increasing the proportion of the martensitic phase from 56.04 to 77.67%. This resulted in a decrease in Vickers microhardness (from 468.3 to 352.3&#xa0;HV), electrical resistivity (from 1.3 to 1.16&#xa0;mΩ∙mm), and saturation magnetization (from 23.67 to 9.6&#xa0;emu/g). In contrast, both coercivity and remanent magnetization rose, with values changing from 5.37 to 21.64&#xa0;Oe and from 0.16 to 0.31&#xa0;emu/g, respectively. Thus, our findings present a new approach for doping the NiMnSn alloy, aimed at modifying its structural and electrical properties, which are important factors for technological applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Impact of partial substitution of Sn by Cu on the mechanical, electrical, and magnetic properties of Ni44Mn44Sn12 Heusler alloys

  • 期刊论文

  • 发表日期：

    2025年2月27日

查看全文
  • Adelaide C. Mélo,
  • Clarice Cardoso Soares,
  • Marcio Assolin Correa,
  • Ariely V. B. Lima,
  • Natalia L. C. Fernandes,
  • Felipe Bohn,
  • Wictor M. P. A. de Lima,
  • Bruno Alessandro Guedes de Lima,
  • Tibério Andrade dos Passos,
  • Ramon Alves Torquato,
  • Danniel Ferreira de Oliveira

摘要

Impact of partial substitution of Sn by Cu on the mechanical, electrical, and magnetic properties of Ni44Mn44Sn12 Heusler alloys was analyzed in this study. The alloys Ni44Mn44Sn12, Ni44Mn44Sn10.5Cu1.5, and Ni44Mn44Sn9Cu3 were produced through casting without atmosphere control and characterized using microscopy scanning electron microscopy, X-ray diffraction, Vickers microhardness tests, electrical resistivity measurements, and vibrating sample magnetometry. The results showed that the partial substitution of Sn with Cu did not affect the solidification microstructure or the phases present at room temperature. However, this substitution increased the transition temperatures from austenite to martensite and from martensite to austenite, increasing the proportion of the martensitic phase from 56.04 to 77.67%. This resulted in a decrease in Vickers microhardness (from 468.3 to 352.3 HV), electrical resistivity (from 1.3 to 1.16 mΩ∙mm), and saturation magnetization (from 23.67 to 9.6 emu/g). In contrast, both coercivity and remanent magnetization rose, with values changing from 5.37 to 21.64 Oe and from 0.16 to 0.31 emu/g, respectively. Thus, our findings present a new approach for doping the NiMnSn alloy, aimed at modifying its structural and electrical properties, which are important factors for technological applications.