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相关概念视频

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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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相关实验视频

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固态加工CoCrMoNbTi高合金用于生物医学应用.

Alina Elena Bololoi1, Laura Elena Geambazu1,2, Iulian Vasile Antoniac1

  • 1Materials Science and Engineering Faculty, National University of Science and Technology Politehnica Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania.

Materials (Basel, Switzerland)
|October 14, 2023
PubMed
概括

高合金 (HEAs) 显示出生物医学用途的前景,提供卓越的生物相容性和机械性能. 本研究详细介绍了一种新型生物HEA粉末的开发和表征,该粉末有可能用于先进的医疗应用.

关键词:
这就是 CoCrMoNbTiTi.生物材料是一种生物材料.生物医学 生物医学高合金的高合金.机械合金机械合金

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物医学工程 生物医学工程
  • 金工业是金工业的一个方面.

背景情况:

  • 高合金 (HEAs) 是一种新兴材料,其独特的特性源于其多元元素组成.
  • 生物相容性是生物医学应用的关键要求,推动了对新型合金系统的研究.
  • 现有的生物医学材料可能存在HEA可能克服的局限性.

研究的目的:

  • 研究生物相容的高合金 (生物-HEA) 作为当前生物医学材料的替代品的潜力.
  • 描述开发的生物HEA粉末的结构,微结构和技术特性.
  • 确认所需阶段的形成,并评估粉末适用于生物医学应用的适用性.

主要方法:

  • 基于价值电子度的相位形成的计算预测.
  • 进行X射线衍射 (XRD) 分析以识别晶体相.
  • 使用先进的成像和绘图技术进行微观结构和组成分析.
  • 机械合金粉的技术特征,包括颗粒大小分析.

主要成果:

  • 该研究预计并证实了以身体为中心的立方 (BCC) 和四边形 (TVC) 阶段的存在,与高强度,可塑性和可塑性相关.
  • 微观结构分析揭示了均和精细的金属粉末颗粒,表明合金成功.
  • 元素映射证实了均分布,这意味着合金过程中有效的元素混合.
  • 机械合金导致颗粒大小的减少,平均颗粒大小为45.12微米.

结论:

  • 开发的生物HEA表现出有前途的特性,包括有利的相组合 (BCC和TVC) 和良好的微观结构特性.
  • 均的元素分布和精细的颗粒大小表明成功合成和适合进一步加工.
  • 这种生物HEA是传统生物医学材料的可行替代品,需要进一步研究临床应用.