Materials Transactions Online

Materials Transactions, Vol.48 No.09 (2007) pp.2542-2544
© 2007 The Japan Institute of Metals

Unusual Plasticity of the Particulate-Reinforced Cu-Zr-Based Bulk Metallic Glass Composites

Qingsheng Zhang, Wei Zhang, Guoqiang Xie and Akihisa Inoue

Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

We report a particulate-reinforced bulk metallic glass composite with high strength and unusual plasticity, which consists of Ta particles homogenously distributed in Cu36Zr48Al8Ag8 glassy matrix. The glassy matrix remains amorphous even after adding up to 15 vol.% of Ta particles. A largest plastic strain of up to 31% was obtained for the 10% Ta-containing composite. Ta particles seed the initiation of multiple shear bands and block the shear band propagation, leading to a net-like homogeneous distribution of the shear bands.

(Received 2007/5/1; Accepted 2007/6/28; Published 2007/8/10)

Keywords: bulk metallic glass, particulate reinforced composites, compression test

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