通过高压固态转化反应合成具有软磁性质的大型球形Co-C合金
Xu Jia1, Leilei Zhang2, Yi Tian1
1Institute of Atomic and Molecular Physics, Sichuan University Chengdu 610065 China lei@scu.edu.cn.
RSC advances
|March 5, 2024
概括
我们开发了一种新的高压反应,以制造碳 (Co-C) 合金. 这些新的Co-C材料具有增强的硬度和独特的磁性,为先进的材料应用开辟了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 高压物理 高压物理
背景情况:
- -碳 (Co-C) 合金由于其机械和磁性特性而引起人们的兴趣.
- 之前的合成方法在生产有控制结构的散装Co-C合金方面存在局限性.
研究的目的:
- 报告一种新的高压固态转化反应 (HSM) 反应,用于生产球形散装Co-C合金.
- 描述合成的Co-C合金的结构,机械和磁性特性.
主要方法:
- 高压固态转化反应 (HSM) 在2-5GPa和高达1400°C的温度下发生.
- 维克斯硬度测试.
- 第一原则计算.第一原则计算.
- 测量磁性属性 (和磁化和强制性).
主要成果:
- 球形散装Co-C合金 (Co3C和Co1-xC) 已成功生产出来.
- 在1300°C形成的转移性Pnma Co3C,在1400°C以上分解为fcc Co1-xC固体溶液.
- 与hcp Co相比,维克尔硬度增加了19.6%,达到大约6.1 GPa.
- 根据第一原则进行的计算显示,Pnma Co3C中的磁矩减少了.
- Co-C 合金表现出柔软的磁性行为,可调整的强制性 (高达 74.8 Oe) 取决于合成压力.
结论:
- 新的HSM反应对于合成具有不同阶段和性质的散装Co-C合金是有效的.
- 合成的Co-C合金表现出明显增强的硬度和可调节的软磁特性.
- 这些发现表明,Co-C合金在需要硬性和磁性响应材料的领域有潜在的应用.
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