Open AccessCrucial effect of SiC particles on in situ synthesized mullite whisker reinforced Al2O3-SiC composite during microwave sintering
Author(s) -
Xudan Dang,
Meng Wei,
Rui Zhang,
Keke Guan,
Bingbing Fan,
Weimin Long,
Jia Ma,
Hongsong Zhang
Publication year - 2017
Publication title -
processing and application of ceramics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.326
H-Index - 15
eISSN - 2406-1034
pISSN - 1820-6131
DOI - 10.2298/pac1702106d
Subject(s) - materials science , mullite , composite material , whisker , sintering , flexural strength , thermal shock , composite number , whiskers , particle size , microwave , ceramic , chemical engineering , physics , quantum mechanics , engineering
Mullite whisker reinforced Al2O3-SiC composites were in situ synthesized by microwave sintering at 1500°C for 30min. The influence of SiC particle size on heating process and properties of Al2O3-SiC composite were investigated. The XRD and SEM techniques were carried out to characterize the samples. The thermal shock resistance and flexural strength of the samples were examined through water quenching and three-point bending methods, respectively. It was found that the bridging of mullite whisker appeared between Al2O3 and SiC particles which enhanced the thermal shock resistance. A so-called local hot spot effect was proposed dependent on the coupling of SiC particles with microwave, which was the unique feature of microwave sintering. The maximal thermal shock resistance and flexural strength were obtained for the samples with SiC particle size of ~5μm
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