Influences of evaluation methods and testing load on microhardness and Young's modulus of ZTA and ATZ ceramics

Academic Article
Publication Date:
2013
abstract:
In thiswork,microindentationtestsunderdifferentconditionswereperformedtodeterminetheinfluenceofindentationloadon Young's modulusandmicrohardnessofZrO2 reinforced withAl2O3 particles (ATZ)andAl2O3 reinforced withZrO2 particles (ZTA). Microhardness ofATZandZTAmaterialswasmeasuredusingtraditionalVickersandinstrumentedmicrohardnessmethodsat500, 1000, 1500and2000mNloads.Asfortheinstrumentedmethod,Vickersmicrohardnesswascalculatedfromtheforce-indentationdepth curves byanalyzingtheunloadingsegments,accordingtotheOliver-Pharrmethod.Inthiswaythepossibledifferencesbetweenthetwo methods werecalculated.Furthermore,Young'smodulusateachloadwascalculatedusingtheinstrumentalmethod. The maindifferencesbetweenthetwomethodswereanalyzed,andtheinfluenceoftheloadonthedefinitionofYoung'smodulusin the caseoftheinstrumentalmethodwasstudied.Theresultsindicatedanindentationloadeffectforbothmaterials,ashardnessand Young's modulusincreasebydecreasingtheindentationload
Iris type:
01.01 Articolo in rivista
Keywords:
Ceramic composites;Microhardness;Young'smodulus;Martenshardness
List of contributors:
Authors of the University:
Handle:
https://iris.cnr.it/handle/20.500.14243/247543
Published in:
CERAMICS INTERNATIONAL
Journal