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Indentation-induced phase transformations in ceramics
Book chapter

Indentation-induced phase transformations in ceramics

Vladislav Domnich and Yury Gogotsi
High-Pressure Surface Science and Engineering, pp 443-466
2004
DOI: https://doi.org/10.1201/9780429144097-12

Abstract

Single Point Diamond Turning XRD Experiment High Indentation Load CSM Technique Pressure Induced Phase Transformation XRD Pattern Rocksalt Structure 3C SiC Contact Loading SEM Image Vickers Indentations Boron Carbide DAC High Pressure Phase Nominal Stoichiometry Experience Phase Transitions Ductile Regime Machining NEMS Device Dislocation Slip Planes Silica Glass Raman Spectra Rocksalt Type Structure TEM Analysis High Pressure Polymorphs Nano Indentation Experiments
This chapter aims to report the detailed analysis of indentation-induced deformation in boron carbide, silicon carbide (SiC), quartz and silica glass and alumina and provides a brief overview of the behaviour of some other ceramics during indentation. Ceramics represent a class of materials that are normally hard and brittle at ambient conditions. Due to their high hardness, ceramics are likely to experience phase transitions during contact loading because the stresses generated near the surface are also high. The fact that indentation leads to relatively high-frequency Raman bands might suggest that a chemical reaction such as oxidation or decomposition to carbon and boron has taken place. Raman microspectroscopy studies indicate that the spectra from hardness impressions in SiC and those from the pristine surface outside the indentation area are significantly different. In the case of SiC there is no correlation between the low-temperature hardness and the phase transformation pressure.

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