CrFeVWX (X = Ta 或 Ti) 高合金:对相位稳定性的理论和实验比较研究
Ricardo Martins1, Vasco Valadares1, André Pereira1
1Instituto de Plasmas e Fusão Nuclear (IPFN), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
Materials (Basel, Switzerland)
|March 14, 2026
概括
同原子高合金 (HEAs) CrFeTaVW和CrFeTiVW显示出对融合反应堆等极端环境的承诺. 实验和模拟结果证实了它们的稳定结构和适合层间应用的热特性.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 计算材料科学科学 计算材料科学
背景情况:
- 极端环境,例如核聚变反应堆中的环境,需要先进的材料.
- (W) 和铜-- (CuCrZr) 是关键材料,但需要中间层来提高性能.
- 由于其独特的特性,高合金 (HEAs) 提供了潜在的解决方案.
研究的目的:
- 为了研究等原子CrFeTaVW和CrFeTiVWHEAs作为层间材料.
- 为了比较模拟预测与实验结果的结构和热性质.
- 评估这些高温电源对于极端环境应用的适用性.
主要方法:
- 蒙特卡洛 (MC) 和分子动力学 (MD) 模拟用于预测结构稳定性和能量.
- 星球球磨机用于合金制备.
- 用火花等离子烧结 (SPS) 来进行整合.
- 进行了X射线衍射 (XRD),扫描电子显微镜 (SEM) 和热扩散度测量以进行材料表征.
主要成果:
- 两种MC和MD模拟都预测了CrFeTaVW和CrFeTiVWHEAs的身体中心立方体 (bcc) 结构.
- 与MD相比,MC模拟表明潜在能量较低,稳定性更强.
- 实验分析证实了在磨粉和合并材料中BCC结构的形成.
- CrFeTaVW HEA 呈现出具有 Fe2Ta Laves 阶段的 bcc 型结构,而 CrFeTiVW HEA 则显示出两个不同的 bcc 型结构.
- 两个HEA的测量热扩散值在3.5到7mm2/s之间.
结论:
- 研究的高温电源 (CrFeTaVW和CrFeTiVW) 具有稳定的结构和有前途的热性能.
- 这些合金适用于极端环境中的中间层,特别是用于核聚变应用.
- 模拟和实验技术的结合为HEA行为提供了全面的理解.
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