S. N. S., Jamaludin and M. I. A., Latiff and D. M., Nuruzzaman and N. M., Ismail and S., Basri (2020) Investigation on microstructure and hardness of nickel-alumina functionally graded material. In: Materials Today: Proceedings, 4th Advanced Materials Conference 2018 , 27-28 November 2018 , Hilton Kuching Hotel, Kuching, Sarawak. pp. 127-132., 29 (Part 1). ISSN 2214-7853
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Abstract
In this research study, six-layered nickel-alumina (Ni-Al2O3) functionally graded material (FGM) was prepared using powder metallurgy (PM) method. The objectives of this study were to investigate the microstructure and hardness of the graded composite layer by layer. Using a cylindrical steel die, the six-layered nickel-alumina graded structure was fabricated considering 0%, 20%, 40%, 60%, 80% and 100% weight percentage of ceramic concentration for different layers. A hydraulic press was used for fabrication of the FGM layered structure and 30 ton compaction load was applied. Considering two-step sintering cycle, sintering was carried out at sintering temperature 1200 °C and sintering time 4 h. The sintered specimens were characterized using optical microscopy (OM), scanning electron microscopy (SEM) and hardness testing. It was observed that uniform particle distribution within the graded layers and smooth microstructural transition occurred between adjacent layers. It was also observed that the interface lines are obvious, less wavy, straight and parallel which confirms proper layer stacking process. On the other hand, from the SEM micrographs, the existence of microcracks and voids are identified in the alumina-rich layer and mostly around alumina particles.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Functionally graded material; Hardness; Microstructure; Nickel-alumina; Powder Metallurgy |
| Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TS Manufactures |
| Faculty/Division: | Institute of Postgraduate Studies Faculty of Manufacturing and Mechatronic Engineering Technology |
| Depositing User: | Mr Muhamad Firdaus Janih@Jaini |
| Date Deposited: | 29 Dec 2022 01:05 |
| Last Modified: | 29 Dec 2022 01:05 |
| URI: | http://umpir.ump.edu.my/id/eprint/35660 |
| Download Statistic: | View Download Statistics |
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