Microstructure and Properties of Ni_70.2Si_29.8 Eutectic Alloy Produced by Directional Solidification

Abstract:

The directional solidification of Ni_70.2Si_29.8 eutectic alloy was carried out, and the solidification microstructure and compression properties of Ni₂Si – Ni₃₁Si₁₂ eutectic composite were systematically studied. Directional solidification samples were obtained by induction heating and down – draw process. During directional solidification, well-aligned lamellar structure with a micron scale was obtained in directional solidified Ni_70.2Si_29.8 eutectic alloy. Despite it is a kind of faceted – faceted eutectic alloys, highly regular and homogeneous structure was obtained through directional solidification. Compared with other methods, the compress test results showed that fracture strength of Ni_70.2Si_29.8 eutectic alloy obtained through directional solidification was improved obviously, reaching 2100 MPa.

• Periodical: Materials Science Forum (Volume 789)
• Pages: 54-58
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.789.54
• Online since: April 2014
• Authors: Qing Hui Meng, Yi Ping Lu*, Yong Dong, Ting Ju Li
• Keywords: Compression Properties, Directional Solidification, Eutectic Alloy, Microstructure

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