调整TiFe1- Ni 化物热力学通过组合定制进行调整
Evans Pericoli1, Viola Ferretti1, Dario Verna1
1Department of Physics and Astronomy A. Righi, University of Bologna, Bologna 40127, Italy.
概括
在铁 (TiFe) 合金中替代有效降低平原压力,以更好地进行固态储存. 这种修改增强了化物形成的热力学,使得TiFe合金更适合接近环境条件.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 固态物理 固态物理
背景情况:
- 铁 (TiFe) 金属间合金对可逆固态储存具有前景.
- 降低TiFe的平原压力对于在近环境条件下 (例如,<150°C,<50 bar) 的应用至关重要.
- 结构修改可以调整金属化物的热力学特性.
研究的目的:
- 研究TiFe合金中 (Ni) 替代铁 (Fe) 对化物形成和分解热力学的影响.
- 为了确定Ni的加入是否可以降低TiFe.的平原压力.
- 分析化物的热力学稳定和力-力补偿效应.
主要方法:
- 通过弧形炼合成TiFe1-xNix合金 (x ≤ 0.30).
- 使用粉末X射线衍射 (PXRD) 和扫描电子显微镜与能量分散式X射线光谱学 (SEM-EDS) 进行结构和形态特性的表征.
- 使用体积测量 (西弗茨装置) 和高压差分扫描热量计 (HP-DSC) 的热力学性能调查.
主要成果:
- 的加入有效地降低了TiFe合金的平原压力.
- 化物形成的热量随着含量增加而变得更加负面,稳定了化物.
- 化物形成的随Ni含量增加而增加,显示和值之间的线性相关性.
- 分析表明,Ni替代的TiFe系统中存在真正的力-力补偿效应.
结论:
- 替代是一种有效的策略,用于调整TiFe合金的热力学特性,以储存.
- 观察到的力-力补偿效应需要进一步调查其起源.
- 优化的TiFe-Ni合金显示出改善可逆固态存应用的潜力.
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