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In-Situ Processing of Mosi2-Base Composites

Published online by Cambridge University Press:  25 February 2011

N. Patibandla,
W.B. Hillig,
M.R. Ramakrishnan,
D.E. Alman and
N.S. Stoloff
N. Patibandla
Affiliation:
Center for Composite Materials and Structures, and Department of Materials Engineering Rensselaer Polytechnic Institute Troy, NY 12180
W.B. Hillig
Affiliation:
Center for Composite Materials and Structures, and Department of Materials Engineering Rensselaer Polytechnic Institute Troy, NY 12180
M.R. Ramakrishnan
Affiliation:
Center for Composite Materials and Structures, and Department of Materials Engineering Rensselaer Polytechnic Institute Troy, NY 12180
D.E. Alman
Affiliation:
Center for Composite Materials and Structures, and Department of Materials Engineering Rensselaer Polytechnic Institute Troy, NY 12180
N.S. Stoloff
Affiliation:
Center for Composite Materials and Structures, and Department of Materials Engineering Rensselaer Polytechnic Institute Troy, NY 12180
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Abstract

Three different methods of preparing Mosi2 and composites reinforced with ceramic fibers by reactive in-situ processing are described. Reactive powder sintering (co-synthesis) of elemental powders, chemical vapor infiltration/deposition and reactive vapor infiltration are examined. Monolithic Mosi2, SiC particle-reinforced Mosi2 or fibrous Mosi2 composites reinforced with Nicalon fiber were prepared. The advantages and disadvantages of these processes relative to more traditional processing techniques such as HIPing of prealloyed powders, mechanical alloying and a reported in-situ displacement reactions are discussed.

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