Abstract
For the purpose of extensive utilization of powder metallurgy to micro/nano- fabrication of materials, the micro gear was prepared by a novel method, named as micro- forming fields activated sintering technology (Micro-FAST). Surface-cleaning of particles, especially during the initial stage of sintering, is a crucial issue for the densification mechanism. However, up to date, the mechanism of surface-cleaning is too complicated to be known. In this paper, the process of surface-cleaning of Micro-FAST was studied, employing the high resolution transmission electron microscopy (HRTEM) for observation of microstructure of micro-particles. According to the evolution of the microstructure, surface-cleaning is mainly ascribed to the effect of electro-thermal focusing. The process of surface-cleaning is achieved through rearrangement of grains, formation of vacancy, migration of vacancy and enhancement of electro-thermal focusing.
| Original language | English |
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| Pages | 1-6 |
| Number of pages | 6 |
| DOIs | |
| Publication status | Published - 10 Aug 2015 |
| Event | 4th International Conference on New Forming Technology - Crowne Plaza Glasgow, Glasgow, United Kingdom Duration: 6 Aug 2015 → 9 Aug 2015 http://www.icnft2015.com/ (conference web site) |
Conference
| Conference | 4th International Conference on New Forming Technology |
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| Abbreviated title | ICNFT2015 |
| Country/Territory | United Kingdom |
| City | Glasgow |
| Period | 6/08/15 → 9/08/15 |
| Internet address |
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Keywords
- powder metallurgy
- micro fabrication
- microforming fields activated sintering technology
- high resolution transmission electron microscopy