Effects of copper content on the shell characteristics of hollow steel spheres manufactured using an advanced powder metallurgy technique

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• 作者：Hamid Sazegaran ; Ali-Reza Kiani-Rashid…
• 关键词：steel hollow spheres ; powder metallurgy ; copper content ; shell characteristics
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：23
• 期：4
• 页码：434-441
• 全文大小：8,468 KB
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• 作者单位：Hamid Sazegaran (1)
  Ali-Reza Kiani-Rashid (1)
  Jalil Vahdati Khaki (1)
  
  1. Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Mineral Resources
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1869-103X

文摘

Metallic hollow spheres are used as base materials in the manufacture of hollow sphere structures and metallic foams. In this study, steel hollow spheres were successfully manufactured using an advanced powder metallurgy technique. The spheres’ shells were characterized by optical microscopy in conjunction with microstructural image analysis software, scanning electron microscopy (SEM), energy- dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). The microscopic evaluations revealed that the shells consist of sintered iron powder, sintered copper powder, sodium silicate, and porosity regions. In addition, the effects of copper content on various parameters such as shell defects, microcracks, thickness, and porosities were investigated. The results indicated that increasing the copper content results in decreases in the surface fraction of shell porosities and the number of microcracks and an increase in shell thickness.