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In Situ Processing and Properties of SiC/MoSi2 Nanocomposites
Author(s) -
Lee Jong Ik,
Hecht Norman L.,
Mah TaiIl,
Mah TaiIl
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02351.x
Subject(s) - materials science , nanocomposite , flexural strength , hot pressing , composite material , pyrolysis , sintering , dispersion (optics) , in situ , chemical engineering , chemistry , physics , optics , engineering , organic chemistry
A novel concept for in situ processing of SiC/MoSi 2 nanocomposites has been developed that combines the pyrolysis of MoSi 2 particles coated with polycarbosilane and subsequent densification by hot pressing. After densification, a uniform dispersion of SiC particles is obtained in the MoSi 2 matrix. The strength at both room and elevated temperature is dramatically improved by the processing protocol employed. The average room‐temperature flexural strength measured for the SiC/MoSi 2 nanocomposite was 760 versus 150 MPa for unreinforced MoSi 2 . The average 1250°C flexural strength measured for the SiC/MoSi 2 nanocomposite was 606 versus 77 MPa for unreinforced MoSi 2 .