摘要
This study investigated the feasibility of preparing intermetallic-matrix composite powders (NiAl/Al2O3) by mechanical alloying of Ni, Al and Al2O3 powder mixtures with various compositions of (NiAl)x(Al2O3)100-x. The as-milled powders were examined by X-ray diffraction, scanning electron microscopy, and differential thermal analysis. The formation of NiAl phase was noticed after 5 h of milling. Intermetallic-matrix composite powders (NiAl/Al2O3) were prepared successfully at the end of milling for (NiAl)x(Al2O3)100-x (x = 79, 66, and 49), but no alumina phase was detected for (NiAl)95(Al2O3)5. It is suspected that the additions of alumina hampered the cold welding and fracturing process. The thermal analysis of (NiAl)x(Al2O3)100-x powders after 1 h of milling revealed that the transition temperature of NiAl phase increased with increasing amount of Al2O3 additions.
原文 | 英語 |
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頁(從 - 到) | 1043-1048 |
頁數 | 6 |
期刊 | Intermetallics |
卷 | 8 |
發行號 | 9-11 |
DOIs | |
出版狀態 | 已發佈 - 9月 2000 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 金屬和合金