Roughness Effect on the Mechanical Properties of Ceramic Materials Measured from Nanoindentation Tests

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An experimental study was performed to evaluate the roughness effect on the determination of hardness and Young´s modulus of ceramic materials from nanoindentation tests. Several specimens polished at various stages were tested at different peak load values. Local roughness measurements have been done by means of atomic force microscopy. Results indicate that roughness and size effects are joined. Proportional Specimen Resistant Modified model (PSRM) was applied to avoid the scale effect, isolating the roughness influence. Indentations where the average roughness-elastic displacement ratio is lower than a critical value are needed to get consistent results.

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Periodical:

Edited by:

Marc Anglada et al.

Pages:

247-250

Citation:

Á. Rico et al., "Roughness Effect on the Mechanical Properties of Ceramic Materials Measured from Nanoindentation Tests", Key Engineering Materials, Vol. 333, pp. 247-250, 2007

Online since:

March 2007

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$38.00

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[10] [20] [30] [40] [50] 600, 1 1 10 100 1000 Ra = 0. 0012 µm Ra = 0. 03 µm Ra = 0. 04 µm Ra = 0. 27 µm Hardness (GPa) Ra/he (%) critical value.

100 200 300 400 5000, 1 1 10 100 1000 Ra = 0. 0012 µm Ra = 0. 03 µm Ra = 0. 04 µm Ra = 0. 27 µm Young´s Modulus (GPa) Ra/he(%) critical value.

[5] [10] [15] [20] [50] 100 150 200 250 300 350.

0, 05 0, 1 0, 15 0, 2 0, 25 0, 3 Ho (GPa) Eo (Gpa) Ho (GPa) Eo (Gpa) Ra (µm).