United Nations has estimated that 130 million people would suffer from osteoarthritis worldwide by 2050. This disease require patients to undergo a surgery known as Total Hip Replacement (THR) which failure rate of approximately 1 % with lifespan 20 years. The biomaterials used manufacture this total hip artroplasty are mainly made Zirconia-Toughened Alumina. In work, Zirconia Toughened Alumina...

Abstract As for many ion conductors, the electrical conductivity of polycrystalline Na- β ″-alumina reported in literature varies by over two decades at a given temperature. This is often ascribed to combination variable effects related grain size, composition, phase content, porosity and impurities, but dominating factors are rarely identified. Based on an extensive set Li2O-stabilized ”-alumi...

Objective: This study investigated the effect of different sintering temperatures and times on the flexural strength and grain size of zirconia. Material and methods: Zirconia specimens (In-Coris ZI, In-Coris TZI, 120 samples) were prepared in a partially sintered state. Subsequently, the specimens were randomly divided into three groups and sintered at different final sintering temperatures an...

Transparent alumina ceramics were fabricated using an extrusion-based 3D printer and post-processing steps including debinding, vacuum sintering, polishing. Printable slurry recipes printing parameters optimized to fabricate quality green bodies of varying shapes sizes. Two-step sintering profiles found increase density while reducing grain size thus improving the transparency sintered over sin...

Oxygen vacancies in WO2.9 yield to formation of easy shear planes and they can potentially be applied boundary lubrication conditions for reducing friction. Mechanical tribological properties pulsed electric current sintered monolithic were studied by nanoindentation nanoscratch, the composites ZrO2 + with reciprocating wear tests. Hardness at 25 °C was ~11 GPa reduced elastic modulus ~150 GPa....