3.8 Proceedings Paper

Microstructures of Co-continuous SiC/Fe-2Cr13 Composite Fabricated by Vacuum-Pressure Casting and Infiltration Processes

Journal

ADVANCED MATERIALS, PTS 1-4
Volume 239-242, Issue -, Pages 1661-+

Publisher

TRANS TECH PUBLICATIONS LTD
DOI: 10.4028/www.scientific.net/AMR.239-242.1661

Keywords

SiC/2Cr13 composite; interface; microstructure; co-continuous

Funding

  1. Natural Science Foundation of Liaoning, China [20072026]
  2. Basic Research Fund for the Northeastern University [N090302005]
  3. China Postdoctoral Science Foundation [20090451271]
  4. National Natural Science Foundation of China [50902018, 50872018]
  5. Program for Changjiang Scholars and Innovative Research Team in University [IRT0713]

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The microstructure of the matrix and the interface of co-continuous SiC/Fe-2Cr13 (porous SiC preforms infiltrated with the Fe-2Cr13) composites has been investigated by XRD, EDS attached to SEM. Results showed that the reaction zone between SiC and Fc-2Cr13 includes two sections, which are silicon carbide reaction zone (SRZ) and metal reaction zone (MRZ), the MRZ can be divided two sections, one is the poor chromium zone (PCrZ-MRZ) and the other is rich chromium zone (RCrZ-MRZ). SRZ is mainly composed of Fe5Si3, Cr7C3, Cr23C6 and Cr3Si, and randomly distributed graphite precipitates. RCrZ-MRZ mainly contains Cr23C6, while PCrZ-MRZ is mostly made up of Fe2Si.

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