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相关概念视频

Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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设计用于极端环境的3D打印合金

Timothy M Smith1, Christopher A Kantzos2, Nikolai A Zarkevich3

  • 1NASA Glenn Research Center, Cleveland, OH, USA. timothy.m.smith@nasa.gov.

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概括

研究人员使用添加剂制造开发了一种新的氧化物分散增强合金GRX-810. 这种先进的材料在极端环境中提供了卓越的强度,爬行性能和抗氧化性能.

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科学领域:

  • 材料科学
  • 金属工程
  • 添加剂制造

背景情况:

  • 多元元素合金具有出色的机械和氧化性能,对于极端环境至关重要.
  • 传统的合金开发通常依赖于资源密集的试错方法.

研究的目的:

  • 使用基于模型的设计方法开发一种新的氧化物分散增强的NiCoCr基合金.
  • 使用基于激光的增材制造来有效分散纳米级氧化物颗粒.

主要方法:

  • 采用基于模型的合金设计策略.
  • 使用激光粉床融合 (一种增材制造) 来制造合金.
  • 描述了微观结构以确认纳米级Y2O3粒子的分散.

主要成果:

  • 在GRX-810合金微观结构中成功分散了纳米级Y2O3粒子.
  • 与传统合金相比,其强度提高了两倍.
  • 在1093°C的温度下提高了1000倍以上的爬行性能.
  • 在1093°C时,氧化阻力提高了两倍.

结论:

  • 以模型为导向的合金设计与增材制造相结合,可以在减少资源消耗的情况下制造出优质材料.
  • GRX-810代表了高性能合金的重大进步,
  • 这种方法通过分散强化和增材制造加速了革命性材料的发现.