Hydroxyapatite (HA) has been used clinically to treat bone defects. However, modifications of the surface properties of HA could improve and control bone matrix deposition and localized host tissue integration. The aim of this study was to investigate the effect of developing a surface charge on HA discs with respect to osteoblast activity in vitro. HA discs (12 mm x 2 mm) were sintered in eith...

Incidents in the Swedish railway have been observed where a significant and sudden loss of brake performance occurs winter conditions, on trains equipped with composite tread blocks (CBB). There is necessity to establish test methods that can be used for evaluation materials under well-controlled laboratory facilitate an understanding friction mechanisms between block steel wheel. This work sou...

Abstract Image analysis is used to study the effect of sintering atmosphere and sintering times on the pores morphology of Astaloy CrM. The pores morphology was described by means of some parameters, Circular Diameter (DC)- which shows the diameter of equivalent circle for comparing the pore size, FElongation and FShape- which have different geometrical meanings. The results have been interpret...

Steel composites reinforced with alumina nanoparticles were prepared by powder metallurgy process. Samples containing two different amounts of carbon (0.35 and 0.55 wt.%) and 0-5 wt.% Al2O3 nanoparticles were fabricated by mixing, compacting and sintering of diffusion bonded Distaloy AE powder. The density, hardness and wear tests were performed on the prepared samples. Fu...

The realization of the first wall (FW), which is composed a protective tungsten (W) armor covering structural steel material, critical challenge in development future fusion reactors. Due to different coefficients thermal expansion (CTE) W and steel, direct joining them results cyclic stress at their bonding seam during operation reactor. To address this issue, study benchmarks two concepts. co...

Magnesium is potentially useful for orthopedic and cardiovascular applications. Magnesium and its alloys are light, biodegradable, biocompatible metals that have promising applications as biomaterials. However, the corrosion rate of this metal is so high that its degradation occurs before the end of the healing process. One of the ways to improve the corrosion rate is to compose it with ceramic...

Magnesium is potentially useful for orthopedic and cardiovascular applications. Magnesium and its alloys are light, biodegradable, biocompatible metals that have promising applications as biomaterials. However, the corrosion rate of this metal is so high that its degradation occurs before the end of the healing process. One of the ways to improve the corrosion rate is to compose it with ceramic...

Cobalt ferrite is a ferrimagnetic magnetostrictive ceramic that has potential application in magnetoelastic and magnetoelectric transducers. In this work, CoFe(2)O(4) was obtained using a conventional ceramic method and Bi(2)O(3) was used as additive in order to obtain liquid-phase sintered samples. Bi(2)O(3) was added to the ferrite in amounts ranging from 0.25 mol% to 0.45 mol% and samples we...

Sintered Halon G-80, a polytetrafluoroethylene (PTFE) resin available commercially in powdered form, is a superb diffuse reflector. Sintered Halon has > 96% absolute reflectance at wavelengths between 300 nm and 380 nm, and about 98% absolute reflectance above 380 rim. It is chemically inert, is mechanically strong, does not fluoresce, and the high reflectance is e&~y to maintain over time. We ...

Graphite-bearing polycrystalline olivine and polycrystalline clinopyroxene with submicron to micron grain size were successfully sintered from a single crystal of naturally occurring olivine (Fo88–92Fa12–8: Mg1.76–1.84Fe0.16–0.24SiO4) and a single crystal of naturally occurring clinopyroxene (Di99Hed1: Ca0.92Na0.07Mn0.01Mg0.93Fe0.01Al0.06Si2O6). The milled powders of both these crystals were si...