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Novel Sialon‐Based Ceramics Toughened by Ferro‐Molybdenum Alloy
Author(s) -
Huang ZhaoHui,
Yang JingZhou,
Liu YanGai,
Fang MingHao,
Huang JunTong,
Sun HaoRan,
Huang SaiFang
Publication year - 2012
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.1551-2916.2011.05051.x
Subject(s) - materials science , alloy , sialon , microstructure , ceramic , composite material , fracture toughness , molybdenum , toughening , toughness , hot pressing , hot isostatic pressing , metallurgy
High‐toughness Sialon ceramic matrix composites containing alloy second‐phase particles were fabricated by hot pressing at a relatively low temperature of 1600°C. Substantially improved fracture toughness of 8.0 MPa·m 1/2 was achieved through the addition of varying amounts of ferro‐molybdenum alloy particles. The microstructure of the composites was characterized and crack propagation behavior was observed to understand the toughening mechanisms. The results showed that crack deflection and crack bridging are the principal mechanisms in the toughening of these types of ceramic composites.