Wang, Hao (2010) The role of casting temperature in preparation of bulk metallic glasses. In: THERMEC 2009: 6th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, 25-29 Aug 2009, Berlin, Germany.
PDF (Accepted Version)
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.
|Item Type:||Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)|
|Additional Information:||Author version deposited in accordance with the copyright policy of the Publisher (Trans Tech)|
|Uncontrolled Keywords:||alloy composition; casting; BMG matrix composites; bulk metallic glass; casting temperature; glass forming ability|
|Depositing User:||Dr Hao Wang|
|Date Deposited:||07 Oct 2010 12:37|
|Last Modified:||02 Jul 2013 23:55|
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