Effect of annealing temperatures on phase evolution and magnetic properties of Co35Cr5Fe10Ni30Ti5Al15 high entropy alloys

IF 1.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2024-09-23 DOI:10.1007/s12034-024-03288-z

Priyanka Kumari, Rohit R Shahi

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引用次数: 0

Abstract

Design and development of novel high entropy alloys (HEAs) having balance magnetic properties with other functional properties are vital for industrial applications of these alloys. In this study, a novel Co₃₅Cr₅Fe₁₀Ni₃₀Ti₅Al₁₅ HEA was synthesized through mechanical alloying and studied for phase evolution and its effects on magnetic properties with annealing at different temperatures. As-synthesized HEA has a major fcc phase with minor concentrations of bcc and R phases. The as-synthesized HEA is also annealed at different temperatures of 500, 700 and 900°C and found that the phase identity of formed phases maintained after annealing. However, for HEA annealed at 1000°C, slight amount of new σ-phase has formed along with initial phases. Values of M_s and H_c were found to be 75 emu g⁻¹ and 18 Oe for as-synthesized Co₃₅Cr₅Fe₁₀Ni₃₀Ti₅Al₁₅ HEA. We found that after annealing at different temperatures, magnetic properties of Co₃₅Cr₅Fe₁₀Ni₃₀Ti₅Al₁₅ HEA show significant improvement. Co₃₅Cr₅Fe₁₀Ni₃₀Ti₅Al₁₅ HEA annealed at 900°C exhibited good soft magnetic characteristics with high M_s (99 emu g⁻¹), low values of H_c (3.8 Oe) and M_r (0.45 emu g⁻¹), as compared to other samples developed in the present study. Thus, designed and developed 900°C annealed Co₃₅Cr₅Fe₁₀Ni₃₀Ti₅Al₁₅ HEA can be further used for magnetic switching applications due to the high value of M_s and low value of M_r.

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退火温度对 Co35Cr5Fe10Ni30Ti5Al15 高熵合金相变和磁性能的影响

设计和开发兼具磁性能和其他功能特性的新型高熵合金（HEAs）对这些合金的工业应用至关重要。本研究通过机械合金化方法合成了新型 Co35Cr5Fe10Ni30Ti5Al15 高熵合金，并研究了其相变及其在不同温度下退火对磁性能的影响。合成的 HEA 具有主要的 fcc 相，以及少量的 bcc 相和 R 相。在 500、700 和 900°C 的不同温度下对合成的 HEA 进行退火处理后发现，退火后形成的相的相性保持不变。但是，在 1000°C 退火的 HEA 中，除了初始相之外，还形成了少量新的σ相。合成的 Co35Cr5Fe10Ni30Ti5Al15 HEA 的 Ms 值和 Hc 值分别为 75 emu g-1 和 18 Oe。我们发现，在不同温度下退火后，Co35Cr5Fe10Ni30Ti5Al15 HEA 的磁性能有明显改善。与本研究中开发的其他样品相比，在 900°C 退火的 Co35Cr5Fe10Ni30Ti5Al15 HEA 具有良好的软磁特性，Ms 值高（99 emu g-1），Hc 值（3.8 Oe）和 Mr 值（0.45 emu g-1）低。因此，设计和开发的 900°C 退火 Co35Cr5Fe10Ni30Ti5Al15 HEA 由于具有高 Ms 值和低 Mr 值，可进一步用于磁开关应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.