Formation of NiAl-Al2O3 intermetallic-matrix composite powders by mechanical alloying technique

Chung Kwei Lin; Shi Shen Hong; Pee Yew Lee

doi:10.1016/S0966-9795(00)00039-X

Formation of NiAl-Al₂O₃ intermetallic-matrix composite powders by mechanical alloying technique

Chung Kwei Lin, Shi Shen Hong, Pee Yew Lee

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1043-1048
Number of pages	6
Journal	Intermetallics
Volume	8
Issue number	9-11
DOIs	https://doi.org/10.1016/S0966-9795(00)00039-X
Publication status	Published - Sept 2000
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0966-9795(00)00039-X

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title = "Formation of NiAl-Al2O3 intermetallic-matrix composite powders by mechanical alloying technique",

abstract = "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.",

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N2 - 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.

AB - 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.

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Formation of NiAl-Al₂O₃ intermetallic-matrix composite powders by mechanical alloying technique

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