Thermal residual stresses exist within a body in the absence of external loading or thermal gradients. Processing of the composites often involves cooling from higher temperature resulting in thermal residual stresses in the matrix due to restraint imposed by reinforcements. Thermal residual stresses determinately affect the properties of materials thereby shortening their lifetime. These resid...

This work reports on the development of a Lead Lanthanum Zirconate Titanate (PLZT) bulk ferroelectric poled ceramic structure as a Piezoelectric Plethysmograph (PZPG) sensor. The ceramic was implanted during its fabrication with a platinum (Pt) wire which works as an internal electrode. The ceramic was then submitted to an experimental setup in order to validate and determine the Pt-wire mechan...

BACKGROUND Mastoid obliteration seeks to replace an open mastoid cavity with material that will become viable and free of infection and cholesteatoma. The purpose of this study was to evaluate the efficacy of bioactive glass ceramic particles for mastoid obliteration using a guinea pig animal model. MATERIALS AND METHODS Ten male guinea pigs (weighing 250-300 g) with normal eardrums and Preye...

Dentists and technicians have used dental ceramics associated with different types of alloys without taking into account the characteristics of compatibility of these materials. Knowing the properties of the alloy and ceramic used in metal/ceramic restorations is a key factor for treatment success. The purpose of this study was to evaluate the bond strength of a palladium-silver alloy (Pors-on ...

Robots that work with humans require a soft sensor skin to cover the entire body. In this paper, we propose a new method to realize such a skin. By implanting wireless sensing elements in an elastic body, we obtain an elastic and tough sensor skin which is able to be shaped freely. The element is a passive resonator chip whose resonant frequency reflects the stress around the chip. The resonant...

Ceramic/fiber composite armor is a hot research topic of bulletproof equipment. The lightweight design ceramic materials and structures has attracted much attention. In this work, in the light remarkable performance against elastic oblique penetration, novel honeycomb panel with hexagonal prism spherical body was designed. splicing ceramic/fiber plate bonded PE plate. prepared, target test cond...

PURPOSE OF THE STUDY Total hip arthroplasty increases the use of alternate bearings to prevent polyethylene wear as the number of younger and more active patients has drastically risen. We carried out a prospective randomized study, to assess and compare clinical results and radiological changes, serum-cobalt- and serum-aluminium-levels when metal-on-metal and ceramic-on-ceramic bearings are ap...