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Ferrosilicochromium‐Filled Polymer‐Derived Ceramics
Author(s) -
Schlier Lorenz,
Steinau Martin,
Travitzky Nahum,
Gegner Juergen,
Greil Peter
Publication year - 2011
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02616.x
Subject(s) - materials science , composite material , fracture toughness , ceramic , pyrolysis , flexural strength , polymer , porosity , shrinkage , bending , residual stress , elastic modulus , chemical engineering , engineering
Rectangular green bodies fabricated from a granulated mixture of polymethylsilsesquioxane (PMS), ferrosilicochromium (FeSiCr), and SiC were cross‐linked in a warm press at 240°C under a pressure of 9 MPa. The samples were then pyrolyzed at 950°C and subsequently heat treated at 1275°C in N 2 atmosphere at pressures up to 5 MPa. For the composites with 25 vol% FeSiCr, a total linear shrinkage of <7% was measured while the residual porosity decreased to 3%. A bending strength of ∼285 MPa, fracture toughness of ∼3.7 MPa m 1/2 , hardness of ∼9.5 GPa, and elastic modulus of ∼186 GPa were evaluated.