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HomeMaterials Science ForumMaterials Science Forum Vols. 747-748Formation of a New Mg-Cu-Ni-Gd Bulk Metallic...

Formation of a New Mg-Cu-Ni-Gd Bulk Metallic Glass: Effects of Rare Earth on Glass-Forming Ability of Mg-Tm-Re Bulk Metallic Glasses

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Abstract:

A new Mg₆₅Cu₁₈Ni₆Gd₁₁ bulk metallic glass (BMG) with high level of Ni content, exhibiting glass-forming ability (GFA) of 6 mm, was fabricated by copper mold casting. The compressive strength and plasticity of the Mg₆₅Cu₁₈Ni₆Gd₁₁ BMG were 938 MPa and 0.14%, respectively. The composition design of the Mg₆₅Cu₁₈Ni₆Gd₁₁ BMG with enhanced GFA had succeeded simply using Gd substituting Y in the Mg₆₅Cu₁₈Ni₆Y₁₁ BMG, which was a result of a comparison on the GFA between the Mg-TM-Gd and Mg-TM-Y BMGs (TM: transition metals). Compared to the Mg-TM-Y BMGs, the Mg-TM-Gd BMGs exhibited improved GFA, which was demonstrated to be mainly attributed to the more negative amorphous formation enthalpy resulting from Gd substituting Y. The effects of rare earth (RE) elements on the GFA of Mg-TM-RE were discussed. This work may suggest an easy way for developing new Mg-based BMGs with improved GFA by rare earth (RE) design.

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Periodical:

Materials Science Forum (Volumes 747-748)

Pages:

217-222

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.747-748.217

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Online since:

February 2013

Authors:

Jian Yin, Zhi Jian Zhou, Zhi Peng Qi, Yi Liu

Keywords:

Glass-Forming Ability, Magnesium, Metallic Glass, Rare Earth (RE)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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