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Effect of calcination temperature on friction and wear behavior of α –alumina ( α ‐Al 2 O 3 ) for biomedical applications
Author(s) -
Fellah Mamoun,
Aissani Linda,
Abdul Samad Mohammed,
Prakasam Mythili,
Purnama Agung,
Montagne Alex,
IOST Alain,
Mejias Alberto,
Kossman Stephania
Publication year - 2018
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/ijac.13116
Subject(s) - calcination , materials science , tribology , scanning electron microscope , crystallite , x ray photoelectron spectroscopy , microstructure , grain size , metallurgy , particle size , chemical engineering , composite material , chemistry , catalysis , biochemistry , engineering
In this study, structural evolution, sliding friction, and wear behavior of the nano‐sized alpha‐alumina ( α ‐Al 2 O 3 ), synthesized by calcination of gibbsite (Al 2 ( OH ) 6 ) at different temperatures (273‐1473 K) are reported using X‐ray diffraction ( XRD ), X‐ray photoelectron spectroscopy ( XPS ), Scanning electron microscopy ( SEM ), and ball‐on‐disk wear tests. The effect of calcination temperature and the correlation between grain size, mechanical properties, and tribological behavior of the compounds are investigated. After calcination at 1473 K, the crystallite size of calcined and sintered alumina ( α ‐Al 2 O 3 ) compacts is as small as 10 nm. Also, it is observed that the average particle and grain size significantly affect the tribological properties of the compounds. At all the applied loads of 2, 8, and 16 N, respectively, the sliding wear rate and coefficient of friction were lower in the alumina compacts calcined at 1473 K. The improved tribological properties are attributed to the finer microstructure resulting in enhanced hardness of the sintered compacts calcined at 1473 K.