PM processing of Al-Al2O3composites and their characterisation
| Autor: | V. V. Bhanu Prasad, K. Soma Raju, S. N. Ojha, G. B. Rudrakshi |
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| Rok vydání: | 2003 |
| Předmět: |
Yield (engineering)
Materials science Metallurgy Metals and Alloys chemistry.chemical_element Condensed Matter Physics chemistry Mechanics of Materials Aluminium Powder metallurgy Ultimate tensile strength Materials Chemistry Ceramics and Composites Extrusion Aluminium powder Composite material Ductility Tensile testing |
| Zdroj: | Powder Metallurgy. 46:219-223 |
| ISSN: | 1743-2901 0032-5899 |
| DOI: | 10.1179/003258903225008553 |
| Popis: | Aluminium based composites containing 5 to 20 vol.-%Al2O3 as the reinforcing phase were synthesised by powder metallurgy. The process consisted of blending aluminium powder with Al2O3 powder followed by hot compaction and hot extrusion. The microstructural features, mechanical properties and wear characteristics of the composites were investigated with variation in volume fraction of Al2O3 phase. The results indicated a continuous increase in yield and ultimate tensile strength with a marked decrease in ductility of the composites arising from increased Al2O3 content. High temperature tensile test data revealed that the strength of the base material Al and composite materials containing 5 and 15%Al2O3 decreased with increase in temperature. However, the rate of strength reduction was higher for the extruded compact of unreinforced aluminium than the composites. Lower wear rates were observed in the composite materials than the unreinforced aluminium compacts. An increase in Al2O3 content led to a... |
| Databáze: | OpenAIRE |
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