Preparation of Al72Ni8Ti8Zr6Nb3Y3 Amorphous Powder and Bulk Material

Yu Wu; Xin Fu Wang; Fu Sheng Han

doi:10.4028/www.scientific.net/MSF.879.690

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Preparation of Al72Ni8Ti8Zr6Nb3Y3 Amorphous Powder...

Preparation of Al₇₂Ni₈Ti₈Zr₆Nb₃Y₃ Amorphous Powder and Bulk Material

Abstract:

Al-based amorphous materials are believed to be a promising light weight and high strength material, but the application has not yet been realized due to difficulties in fabricating bulk materials resulted from their quite weak glass forming ability. In order to overcome this difficulty, a solid state route was studied to fabricate bulk Al-based metallic glass. An amorphous Al₇₂Ni₈Ti₈Zr₆Nb₃Y₃ powder was first fabricated by mechanical alloying, and then the microstructure, glass-forming ability and crystallization behavior were characterized. The powder shows a wide supercooled liquid region (81K), and high activation energy for crystallization (312.6kJ/mol). By this powder, a bulk material was fabricated through high pressure (2GPa) sintering (673K and 723K). The microhardness of bulk sample is as high as 1215Hv, providing a solid basis for fabricating bulk materials and applications.

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Periodical:

Materials Science Forum (Volume 879)

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690-696

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.690

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Online since:

November 2016

Authors:

Yu Wu, Xin Fu Wang, Fu Sheng Han*

Keywords:

Aluminum Based Metallic Glass, Amorphous Alloy, Mechanical Alloying, Sintering

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