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Mechanical Properties and Thermal Shock Resistance of Refractory Self‐Reinforced α‐SiAlONs Using Barium Aluminosilicate as an Additive
Author(s) -
Ye Feng,
Liemeng Liu,
Haijiao Zhang,
Liu Chunfeng,
Yu Zhou
Publication year - 2010
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.1744-7402.2010.02531.x
Subject(s) - materials science , thermal shock , microstructure , aluminosilicate , barium , sialon , crystallization , ceramic , composite material , hot pressing , phase (matter) , refractory (planetary science) , doping , metallurgy , chemical engineering , organic chemistry , chemistry , optoelectronics , engineering , catalysis
Yb‐, Y‐, Yb/Y‐, and Yb/Nd‐doped α‐SiAlON ceramics with 5 wt% barium aluminosilicate (BAS) were synthesized by hot pressing. Typical self‐reinforced microstructures were obtained in all investigated α‐SiAlONs in spite of the type of doped cations. This is attributed to the incorporation of BAS, which could supply suitable liquid phase to promote the anisotropic growth of the α‐SiAlON grains. All the composites exhibited excellent high‐temperature mechanical properties and thermal shock resistance due to the formation of a self‐reinforced microstructure and the complete crystallization of BAS additive.