High frequency acoustic emission monitoring in nano-impact of alumina and partially stabilised zirconia

0561956 - FZÚ 2023 RIV CH eng J - Journal Article
Beake, B.D. - Čtvrtlík, Radim - Harris, A.J. - Martin, A.S. - Václavek, L. - Maňák, Jan - Ranc, V.
High frequency acoustic emission monitoring in nano-impact of alumina and partially stabilised zirconia.
Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. Roč. 780, April (2020), č. článku 139159. ISSN 0921-5093. E-ISSN 1873-4936
R&D Projects: GA MŠMT LM2015087
Institutional support: RVO:68378271
Keywords : micromechanics * electron microscopy * fracture mechanics/fracture behavior/fatigue * ceramics
OECD category: Ceramics
Impact factor: 5.234, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.msea.2020.139159

High frequency acoustic emission monitoring is proving a useful technique in improving the understanding of deformation processes occurring in nano- and micro-scale mechanical contacts. In this study AE monitoring has been used to investigate the fracture of alumina and MgO-partially stabilised zirconia (PSZ) at high strain rate in repetitive nano-impact tests with cube-corner and 5 μm radius spherical diamond indenters. Focussed ion beam milling of impact craters revealed sub-surface intergranular cracking on alumina and sub-surface transgranular cracking on PSZ. The evolution of AE through the test was strongly dependent on the geometry of the indenter used to create the impacts. AE energy was generally much higher when impacts cause rapid increases in penetration depth, with single high energy hits observed on abrupt depth bursts in tests with the cube corner indenter.
Permanent Link: https://hdl.handle.net/11104/0334381