In Situ TiB₂ and Al₂(Y, Gd) Particles Reinforced Magnesium Matrix Composite with Al-Ti-B Addition

Abstract:

In-situ micro/nanosized TiB₂ and Al₂(Y, Gd) particles reinforced magnesium matrix composite was successfully fabricated by addition of Al-Ti-B preform into Mg-Gd-Y-Zn matrix alloy, its microstructures and properties were investigated. The results show that the introduction of Al-Ti-B preform causes the precipitation of Al₂(Y, Gd) particles and the SHS synthesis of TiB₂ particles which significantly refine solidification structure. The reinforced Al₂(Y, Gd) particles with average sizes of 5-8 μm are uniformly distributed throughout the magnesium matrix, and have a good bond to the matrix. Tensile tests indicate that, compared with the former matrix alloy, mechanical properties of the multiple in-situ particles reinforced composite are improved all-roundly.

• Periodical: Applied Mechanics and Materials (Volume 312)
• Pages: 315-318
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.312.315
• Online since: February 2013
• Authors: C.F. Fang, L.G. Meng, N.N. Wu, X.G. Zhang
• Keywords: Al₂(Y, Gd), Magnesium Matrix Composite, Microstructure, Self-Propagating High-Temperature Synthesis (SHS), TiB₂

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