在过渡金属上评估液的湿化行为:一个实验性和分子动力学模拟研究
Na Liang1, Xiaogang Fu1, Jinquan Zhang1
1China Institute of Atomic Energy, Beijing 102413, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
液体与过渡金属的湿透性对于冷快反应堆至关重要. 形成金属间化合物的金属或具有强烈的原子相互作用,特别是与密集的结构,显示优越的湿,指导材料选择.
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.
- 物理化学 物理化学
背景情况:
- 在冷快反应堆 (SFR) 操作和仪器仪表中,液的材料浸湿性至关重要.
- 选择具有特定可湿性质的材料是SFR工程设计中的一个关键挑战.
研究的目的:
- 为了研究液态与九种过渡金属的湿化行为.
- 了解材料特性和的湿透性之间的关系,用于工程应用.
主要方法:
- 扫描电子显微镜 (SEM) 用于表面分析.
- 用X射线衍射 (XRD) 来进行相位识别.
- 分子动力学 (MD) 对原子级相互作用的模拟.
主要成果:
- 与形成金属间化合物的金属 (如,黄金) 具有出色的湿透性.
- 具有强烈原子间相互作用的金属 (例如,,,铜) 显示适度的湿透性,在较低的温度下下降.
- 没有反应和弱亲和度的材料具有较差的湿透性.
- 密集的结构 (fcc,hcp) 通常与比身体中心立方体 (bcc) 结构更好的湿透性相关.
结论:
- 材料的反应性,原子间力和晶体结构显著影响液的湿透性.
- 这些发现为在冷快反应堆的设计和运行中选择合适的材料提供了指导.
- 了解这些湿行为对于提高核应用中的安全性和效率至关重要.
更多相关视频
10:52Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
12.8K
13:58Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
Published on: September 28, 2016
11.8K
相关概念视频
02:10Reduction of Alkynes to trans-Alkenes: Sodium in Liquid Ammonia
9.2K
Alkynes can be reduced to trans-alkenes using sodium or lithium in liquid ammonia. The reaction, known as dissolving metal reduction, proceeds with an anti addition of hydrogen across the carbon–carbon triple bond to form the trans product. Since ammonia exists as a gas (bp = −33°C) at room temperature, the reaction is carried out at low temperatures using a mixture of dry ice (sublimes at −78°C) and acetone.
When dissolved in liquid ammonia, an alkali metal,...
When dissolved in liquid ammonia, an alkali metal,...
9.2K
02:54Ions as Acids and Bases
23.7K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
23.7K