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The main complications of zirconia-based laminated systems are chipping and delamination of veneering porcelain, which has been found to be directly associated with the development of residual thermal stresses in the porcelain layer. This study investigates the effects of cooling rate and specimen geometry on the residual stress states in porcelain-veneered zirconia structures. Bilayers of three different...
Study of low frequency, small size transducers was an important aspect for development of underwater acoustic transducers. Flex-tensional transducers of Class ? are typical low frequency, high-power and small size transducers. For reducing the resonance frequency, a new kind of flex-tensional transducers with excitation from folded actuators was put forward. The transducer was designed with finite...
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