Surface and subsurface Vickers indentation cracks in SiC, Si3N4, and sialon ceramics

S.G. Cook, J.E. King, J.A. Little

    Research output: Contribution to journalArticlepeer-review


    The nature of subsurface cracks formed under and around Vickers hardness indentations is often assumed rather than identified. Subsurface cracks in four engineering ceramics are revealed using a penetrant technique, and flaw dimensions are recorded. The resulting data are used to investigate several aspects of indentation cracking, such as crack shape, functional relationships between indentation load and flaw dimensions, and the performance of indentation fracture toughness equations. An R curve is constructed for each of the materials. © 1995 The Institute of Materials.
    Original languageEnglish
    Pages (from-to)1093-1098
    Number of pages6
    JournalMaterials Science and Technology
    Issue number11
    Publication statusPublished - Nov 1995


    • crack shape
    • engineering ceramic
    • functional relationship
    • indentation fracture toughness
    • indentation load
    • R-curves
    • sialon ceramics
    • subsurface cracks
    • Vickers hardness indentation
    • Vickers indentation cracks
    • ceramic materials
    • cracks
    • fracture toughness
    • silicon carbide
    • Vickers hardness
    • indentation


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