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Transient liquid-phase sintering of ceramic-reinforced Fe-based composites

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Abstract

The microstructural development of ceramic-reinforced iron-based composites has been studied. The composites were fabricated via powder metallurgy and liquid-phase sintering, a processing route which achieves near-net-shape with good ceramic particulate dispersion. Two matrix alloys were used, Fe-1 wt% C-1 wt% Si and Fe-2 wt% Cu; up to 30 wt% (≈36 vol%) yttria-stabilized zirconia in the form of ∼20 μm particles was added to these alloys. The microstructural evolution of these composite materials was studied by examining the densification rate and volume fraction of liquid phase as a function of time. Different particle/matrix interfaces developed in the two composites. A glassy silicon-rich layer formed in the Fe-1C-1Si-YSZ composites and a more limited crystalline layer was found in the Fe-2Cu-YSZ composites.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Michigan Technological University, 49931, Houghton, MI, USA

    S. J. Yankee & B. J. Pletka

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  1. S. J. Yankee
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  2. B. J. Pletka
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Yankee, S.J., Pletka, B.J. Transient liquid-phase sintering of ceramic-reinforced Fe-based composites. J Mater Sci 26, 5067–5074 (1991). https://doi.org/10.1007/BF00549893

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