The role of casting temperature in preparation of bulk metallic glasses

Wang, Hao (2010) The role of casting temperature in preparation of bulk metallic glasses. In: 6th International Conference on Processing and Manufacturing of Advanced Materials (THERMEC 2009): Processing, Fabrication, Properties, Applications, 25-29 Aug 2009, Berlin, Germany.

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Abstract

In the past research on bulk metallic glasses (BMGs) has been concentrated on searching for alloy composition to obtain high glass forming ability. Very few studies are on the effect of processing condition on glass forming ability of BMGs. In this study, we have prepared CuZr-based BMGs at different casting temperatures. Increasing casting temperature increases glass forming ability and decreases the amount of the crystalline phase during BMG solidification. At a high casting temperature 1723 K, fully amorphous sample is obtained at a size of 2 mm in diameter. While under the lower casting temperatures (1523 K and 1323 K), crystalline CuZr phases exist. The formation of the crystalline phase is attributed to the initial crystals or cluster survived in the BMG melt during ingot remelting. The study indicates that casting temperature can be used as the controlling parameter to produce purely amorphous materials or crystalline CuZr-phase reinforced BMG composites, and the mechanical properties and thermal stability of the BMG composites can be tailored by the amount of the crystalline phase existed in the materials.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright 2010 Trans Tech Publications. Author version deposited in accordance with the copyright policy of the Publisher
Depositing User: Dr Hao Wang
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 07 Oct 2010 12:37
Last Modified: 04 Aug 2014 06:48
Uncontrolled Keywords: alloy composition; casting; BMG matrix composites; bulk metallic glass; casting temperature; glass forming ability
Fields of Research (FOR2008): 09 Engineering > 0912 Materials Engineering > 091206 Glass
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
03 Chemical Sciences > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry
Socio-Economic Objective (SEO2008): B Economic Development > 86 Manufacturing > 8612 Fabricated Metal Products > 861203 Metal Castings
Identification Number or DOI: doi: 10.4028/www.scientific.net/MSF.638-642.1671
URI: http://eprints.usq.edu.au/id/eprint/8204

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