Effects of copper content on the shell characteristics of hollow steel spheres manufactured using an advanced powder metallurgy technique
| Autor: | Jalil Vahdati Khaki, Ali-Reza Kiani-Rashid, Hamid Sazegaran |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope 020502 materials Mechanical Engineering Metallurgy Metals and Alloys Shell (structure) chemistry.chemical_element Sodium silicate 02 engineering and technology 021001 nanoscience & nanotechnology Copper law.invention Iron powder chemistry.chemical_compound 0205 materials engineering chemistry Optical microscope Geochemistry and Petrology Mechanics of Materials law Powder metallurgy Materials Chemistry 0210 nano-technology Porosity |
| Zdroj: | International Journal of Minerals, Metallurgy, and Materials. 23:434-441 |
| ISSN: | 1869-103X 1674-4799 |
| DOI: | 10.1007/s12613-016-1253-9 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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