Different volume fractions (1.3, 2.6, and 7.6 Vol.%) of carbon nanotubes (CNTs) were dispersed within 8Y-TZP nanopowders. Mixed powder specimens were subsequently processed by spark plasma sintering (SPS) and effects of CNTs on the sintering process of 8Y-TZP/CNT composites was studied. Maintenance of CNTs through the SPS process was confirmed using TEM and Raman Spectroscopy. Studies on the si...

Fatigue is one of the most important properties to be considered in ceramic dental implants due cyclic mechanical stresses arising from chewing process. In this work, fatigue behaviour hydrothermally degraded ZrO2-based ceramics stabilized with 3mol% Y2O3 (3Y-TZP) was studied 4-point bending tests. Samples 3Y-TZP were compacted (100MPa), sintered at 1475 ?C for 2 h, polished and an autoclave as...

Conventional ceria-stabilized tetragonal zirconia (Ce-TZP) with modest flexural strength has rarely been used as compared to yttria-stabilized zirconia, even though it excellent hydrothermal stability and high toughness. Ce-TZP-based composites were recently developed, being tough remarkably in combination transformation-induced plasticity. However, distinct from the widely applied composite ap...

Methods We reviewed data from critically ill cirrhotic patients and matched controls in whom routine therapeutic drug monitoring (TDM) of broad-spectrum b-lactam antibiotics (ceftazidime or cefepime, CEF; piperacillin/tazobactam; TZP; meropenem, MEM) was performed. Serum drug concentrations were measured twice during the elimination phase by high-performance liquid chromatography (HPLC-UV). Ant...

INTRODUCTION Sepsis is responsible for important alterations in the pharmacokinetics of antibiotics. Continuous renal replacement therapy (CRRT), which is commonly used in septic patients, may further contribute to pharmacokinetic changes. Current recommendations for antibiotic doses during CRRT combine data obtained from heterogeneous patient populations in which different CRRT devices and tec...

Degradation of yttria-stabilized zirconia dental implants abutments due to the tetragonal to monoclinic phase transformation was studied in detail by microstructural characterization using Electron Back Scatter Diffraction (EBSD). The amount and distribution of the monoclinic phase, the grain-size distribution and crystallographic orientations between tetragonal and monoclinic crystals in 3 mol...

Ceria-terbia solid solution nanobelts were prepared by an electrochemical route and tested as catalysts of high activity for CO oxidation.

Electrically conductive zirconia tungsten carbide composites are attractive materials for manufacturing precision components by electrical discharge machining due to their high strength, toughness and conductivity. In this study, nanocomposite ceramics with a ytterbia samaria co-stabilized 1.5Yb-1.5Sm-TZP matrix 24–32 vol.% dispersion were manufactured spark plasma sintering (SPS) at 1400 °C 15...

The effects of CeO2 addition on the sintering behavior and mechanical properties of Y-TZP have been investigated over a wide sintering regime by pressureless sintering. It has been revealed that small additions of CeO2 (0.3-1.0 wt%) to Y-TZP were beneficial in enhancing the mechanical properties and hydrothermal ageing resistance of Y-TZP. Sintered samples were used to evaluate the bulk density...