Open AccessEffects of milling and subsequent heat treatment on preparation of mullite–zirconia nanocomposites
Author(s) -
Ghaffari Somaye,
Alizadeh Masoud,
Asadian Keivan,
Ebadzadeh Touradj,
Ghanbari Arezoo
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0008
Subject(s) - mullite , nanocomposite , cubic zirconia , materials science , chemical engineering , composite material , ceramic , engineering
Mullite–zirconia composites were fabricated through reaction sintering of mechanically activated alumina and zircon powder mixtures. X‐ray diffraction results showed that increasing milling time resulted in gradual weakening and broadening of alumina and zircon peaks. For the sample milled for 70 h in which there are no peaks present from zircon, heating at 1200°C resulted in the reappearance of the zircon peaks. Samples sintered at 1500°C achieved complete formation of mullite and zirconia. These samples exhibited the following physical and mechanical properties: density 3.87 g/cm 3 , open porosity 3.45%, hardness 11.44 ± 0.3 GPa and fracture toughness 4.7 Mpam 1/2 .