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相关概念视频

Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

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Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Precipitation Gravimetry01:03

Precipitation Gravimetry

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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
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相关实验视频

Updated: Sep 13, 2025

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
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一种化策略,以抑制基于的单晶超级合金中的再结晶.

Xing Hu1, Fuze Xu2,3, Menglin Gao1

  • 1Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.

Materials (Basel, Switzerland)
|July 30, 2025
PubMed
概括

抑制单晶超合金中的再结晶是轮机叶片的关键. 一个1000°C的回收炼有效地通过最小化几何上必要的位移 (GNDs) 来防止再结晶.

关键词:
烧焦的烧焦方式微观结构的微观结构再结晶化,重新结晶化单晶超合金是一种单晶超合金.

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
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科学领域:

  • 材料科学 材料科学 材料科学
  • 金工业是金工业的一个方面.
  • 机械工程 机械工程

背景情况:

  • 在先进的轮叶片应用中,对高应变基单晶超合金的再结晶抑制至关重要.
  • 了解初级玛素 (γ') 阶段的演变和化过程中的位移对于控制材料特性至关重要.

研究的目的:

  • 在压力变形后,研究初级 γ' 阶段的化行为和第三代 Re-containing 单晶超合金 (WZ30) 中的位移.
  • 确定最佳的回火条件,以抑制这些先进超级合金中的再结晶.

主要方法:

  • 将WZ30超合金进行5%的压力变形.
  • 在1分钟内从700°C到1200°C进行同时火.
  • 使用扫描电子显微镜 (SEM) 和电子反射散射衍射 (EBSD) 进行微观结构分析.
  • 在1000°C进行长时间的回收化,持续10小时.

主要成果:

  • 观察到几何必要脱位 (GND) 密度与回火温度的非线性变化.
  • 确定了1000°C的最小GND密度,保留了62.7%的初级γ'阶段.
  • 证明在1000°C的长时间回收化有效地抑制了随后溶液热处理期间的再结晶.

结论:

  • 一种特殊的化策略,涉及1000°C的长时间回收,可以有效地抑制单晶超级合金中的再结晶.
  • 这种方法提供了一种实际的方法来提高轮机叶片的高温性能和耐用性.