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Multifunctional Properties of Alumina Composites Reinforced by a Hybrid Filler
Author(s) -
Ahmad Kaleem,
Pan Wei,
Qu Zhixue
Publication year - 2009
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.1744-7402.2008.02257.x
Subject(s) - materials science , composite material , spark plasma sintering , microstructure , carbon nanotube , fracture toughness , thermal conductivity , volume fraction , nanoparticle , flexural strength , composite number , electrical resistivity and conductivity , nanotechnology , engineering , electrical engineering
Hybrid microstructure design has been used to fabricate alumina composites reinforced by 5 vol% of multiwalled carbon nanotube (MWNT) together with different (1, 2, 3 vol%) contents of SiC nanoparticles by spark plasma sintering. The mechanical, thermal, and electrical properties of the composites were determined as a function of the SiC volume fraction. The thermal conductivity decreased for 1 and 2 vol% of SiC, while for 3 vol%, it increased. Substantial improvements in the fracture toughness, bending strength, and electrical conductivity were observed and attributed to a synergetic effect of the MWNT and SiC nanoparticles in the hybrid microstructure design.