A novel surface modifying technique, friction stir processing¡]FSP¡^, has been developed for fabrication of surface composite. Al-Al2O3 surface composites with different volume fractions of particles were successfully fabricated. The Al2O3 particles were uniformly distributed in the aluminum matrix. The surface composites have excellent bonding with the aluminum alloy substrate. The microhardness of the surface composite reinforced with 40 vol% Al2O3 of ~50nm, average particle size was ~150 HV, almost doubt that of the 5083 Al alloy substrate¡]86HV¡^. The distribution curves showed that the SD was increased steeply when the volume fractions of Al2O3 particles of SZ attained to about above 30 vol%. In addition, it is difficult to reduce the grain size of SZ stirring with powder by increasing traveling speed or adding more volume fractions of Al2O3 particles because the processing temperature is higher than 0.5 Tm.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0720104-104927 |
| Date | 20 July 2004 |
| Creators | Hu, Che-ming |
| Contributors | Kao Po-We Professor, Ho, New-Jin Professor, Huang, J. Chih-Ching Professor |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0720104-104927 |
| Rights | restricted, Copyright information available at source archive |
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