基于沃尔夫星团模型的融中的短距离结构的理论和实验研究
Chun Wang1, Minghao Hua1, Luyao Wang1
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.
Materials (Basel, Switzerland)
|January 11, 2025
概括
沃尔夫集群模型 (WCM) 准确地描述了融中的短距离顺序 (SRO). 模拟的高温X射线衍射 (HTXRD) 模式与实验数据相匹配,验证了 WCM 对共价系统的有效性.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 物理化学 物理化学
背景情况:
- 了解金属融中的短距离顺序 (SRO) 对于预测材料性能至关重要.
- (Ga) 化物由于其共价键特性而表现出复杂的结构行为.
- 之前的模型在这些系统中准确捕获SRO方面存在局限性.
研究的目的:
- 为了研究融的短距离秩序结构.
- 评估Wulff集群模型 (WCM) 用于描述加勒比地区SRO的适用性.
- 将模拟的高温X射线衍射 (HTXRD) 模式与实验数据进行比较.
主要方法:
- 利用了沃尔夫集群模型 (WCM) 来模拟Ga的融化.
- 衍生结构,外部具有Wulff形状,内部具有晶体对称性.
- 在523 K,623 K和723 K进行了高温X射线衍射 (HTXRD) 实验.
主要成果:
- 来自Ga WCM的模拟HTXRD模式与经过测试的温度的实验数据有很好的一致性.
- 该模型准确地复制了峰值位置,宽度和相对强度.
- 在523K的微小偏差被归因于前核形成的开始.
结论:
- 沃尔夫集群模型 (Wulff Cluster Model, WCM) 在描述融中的短距离顺序 (SRO) 分布方面非常有效.
- WCM提供了一个强大的框架,用于理解融系统中具有共价特性的SRO.
- 这些发现支持在未来对类似的共价化系统进行研究时使用WCM.
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