Sataporn Wuttiphan

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Fracture modes in a model glass–polymer coating–substrate system indented with hard spheres are investigated. The large modulus mismatch between the glass and polymer results in distinctive transverse fracture modes within the brittle coating: exaggerated circumferential (C) ring cracks that initiate at the upper coating surface well outside the contact (as(More)
Natural teeth (enamel/dentin) and most restorations are essentially layered structures. This study examines the hypothesis that coating thickness and coating/substrate mismatch are key factors in the determination of contact-induced damage in clinically relevant bilayer composites. Accordingly, we study crack patterns in two model "coating/substrate"(More)
OBJECTIVES This study examines the hypothesis that microstructure plays a critical role in the accumulation of strength-degrading damage in dental ceramics. A series of micaceous glass-ceramics crystallized from a common glass composition, using heat treatments to increase the diameter and aspect ratio of mica platelets, is used as a model ceramic system.(More)
Laminate structures consisting of hard, brittle coatings and soft, tough substrates are important in a wide variety of engineering applications (cutting tools, electronic multilayers, laminated windscreens), biological structures (teeth and dental crowns, shells, bones), and traditional pottery (ceramic glazes). A hard outerlayer variously offers increased(More)
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