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Study on Reaction Products of B4C-CeB6/Al Composites

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Abstract:

B4C-CeB6/Al composite was fabricated by pressureless infiltration technology. It is composed of the phases of Al, B4C, AlB2, Al3BC and CeB6, and Al4C3 is not found because of the existence of CeB6. It could identify that AlB2, CeB6, and Al3BC were formed as interfacial reaction products. Al3BC is formed on the interface of B4C and Al; therefore it connects the aluminum with the ceramic toughly. AlB2 as strip crystal is formed between B4C and Al, which has higher fracture toughness.CeB6 particles in B4C grain boundary are discovered by TEM, which caused intercrystalline rupture. Grain toughening and reinforcing, crack deflection, crack bridging is the main toughening and reinforcing mechanisms of B4C-CeB6/Al composites.

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Periodical:

Advanced Materials Research (Volumes 391-392)

Pages:

683-687

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.391-392.683

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Online since:

December 2011

Authors:

Ke Wu Peng, Peng Zhang, He Li Ma, Ren Chen

Keywords:

B4C-CeB6/Al Composite, In Situ, Pressureless Infiltration, Reaction Products

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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