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  1. No Access

    Article

    Influence of zirconia sol-gel coatings on the fracture strength of brittle materials

    In this work, the effect of a sol-gel ZrO2–3 mol% Y2O3 thin film on the fracture properties of a variety of brittle substrates was investigated. The results suggest that the film does not have any appreciable inf...

    Estíbaliz Sánchez-González, Pedro Miranda… in Journal of Materials Research (2005)

  2. No Access

    Article

    Effect of oxide and nitride films on strength of silicon: A study using controlled small-scale flaws

    Strength properties of silicon substrates containing dense oxide and nitride surface films are investigated using nanoindentations to introduce small flaws of predetermined scale. The indentation flaws provide...

    Yeon-Gil Jung, Antonia Pajares, Brian R. Lawn in Journal of Materials Research (2004)

  3. No Access

    Article

    Effect of Sol-Gel Thin Coatings on the Fracture Strength of Glass

    The effect of ZrO2–3 mol/ Y2O3 sol-gel thin coatings on the fracture of soda-lime glass is investigated. For this purpose, a recently developed strength measurement procedure—based on making a brittle material fl...

    Estíbaliz Sánchez-González, Pedro Miranda… in Journal of Materials Research (2004)

  4. No Access

    Article

    Strength of silicon containing nanoscale flaws

    Silicon is a principal material in submicrometer-scale devices. Components in such devices are subject to intense local stress concentrations from nanoscale contacts during function. Questions arise as to the ...

    Antonia Pajares, Marina Chumakov, Brian R. Lawn in Journal of Materials Research (2004)

  5. No Access

    Article

    Overview: Damage in brittle layer structures from concentrated loads

    In this article, we review recent advances in the understanding and analysis of damage initiation and evolution in laminate structures with brittle outerlayers and compliant sublayers in concentrated loading. ...

    Brian R. Lawn, Yan Deng, Pedro Miranda, Antonia Pajares… in Journal of Materials Research (2002)

  6. No Access

    Article

    Contact fracture of brittle bilayer coatings on soft substrates

    Contact-induced fracture modes in trilayers consisting of a brittle bilayer coating on a soft substrate were investigated. Experiments were performed on model transparent glass/sapphire/polycarbonate structure...

    Pedro Miranda, Antonia Pajares, Fernando Guiberteau… in Journal of Materials Research (2001)

  7. No Access

    Article

    Effect of mechanical damage on thermal conduction of plasma-sprayed coatings

    A thermal wave methodology for monitoring the thermal conduction of ceramic coatings with accumulating mechanical damage is described. Tests are conducted on a model alumina coating containing laminar defect i...

    Lanhua Wei, Antonia Pajares, Brian R. Lawn in Journal of Materials Research (1996)

  8. No Access

    Article

    Damage accumulation and cyclic fatigue in Mg-PSZ at Hertzian contacts

    Hertzian contact damage in as-fired, peak-aged, and over-aged Mg-PSZ is studied, in single-cycle and multiple-cycle loading. Indentation stress-strain curves reveal a monotonically increasing quasi-plasticity ...

    Antonia Pajares, Lanhua Wei, Brian R. Lawn… in Journal of Materials Research (1995)