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Tungsten trioxide (WO3) has excellent mechanical properties, making them to be
applied in various applications. However, researches on the mechanical properties of WO3 in
the micrometer scale are limited. Here, the purpose of this study was to demonstrate
nanoindentation technique in an attempt to study the micro-mechanical characteristics of
monoclinic WO3 microparticles that were previously synthesized using a direct heat treatment
of ammonium tungstate pentahydrate powder at a temperature of 800œC. The experiment
comprises a measurement by load controlled nanoindentation test on the particle sample to
obtain force and displacement relationship. The results exhibited variability on the forcedisplacement curves for similar applied load. This could be due to the micro-mechanical
effects generated by the existence of inclusions, precipitates, and oxides inside the micron
WO3 particles. The present study demonstrates the importance of understanding the micromechanical
characteristics of WO3 for clarifying the inhomogeneity effects on its macromechanical properties.
Keywords: tungsten trioxide, micro-mechanical characteristics, nanoindentation, porous material |
full paper (pdf, 1248 Kb)