<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Crack propagation behavior was studied for aluminium/aluminum adhesive joints bonded with two epoxy adhesives: pure and reinforced with clay nanoparticles. The focus was also on the novel use of the constant displacement rate test to study adhesion/adhesives efficiency. The epoxy systems studied were: Epidian E6 produced from bisphenol A and epichlorohydrin, ("Organika -Sarzyna" Poland); pure or strengthened with montmorillonit nanoparticles (MMT). Crack growth rate was estimated for two displacement rates. The nanoparticle reinforced epoxy showed advantage over pure epoxy adhesive (Figs. 4,5). This effect was more pronounced at low deflection rates. The constant displacement rate test was found promising to study microstructural effects in adhesive joints.</abstract>

Materials Science & Engineering Department, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland

Laboratoire de Mecanique Physique, Universite Bordeaux 1, 351 Cours de la Liberation, 33-405 Talence-Cedex, France

Polymer Institute, West Pomeranian University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland

Fracture of Aluminium Joints Bonded with Epoxy Adhesive Reinforced by MMT Nanoparticles

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The paper presents results of tests on fouling of titanium and stainless steel in sea water. Specimens of stainless steel were more susceptible to fouling than specimens of titanium. Chlorine dosing prevents fouling of titanium.</abstract>

Fouling of Titanium and Stainless Steel in Sea Water

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The materials being in use in medicine require some improvement, as well as new materials are needed. One of the newest trends in the development of implants, is applying the porous structures - scaffolds, which are expected to produce vesseled bone tissue at a quicker rate and a stable joining of implant with the body. The aim of the paper is the review of porous materials in the latest literature.</abstract>

Porous Materials Used as Inserted Bone Implants

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">TiN nanocrystalline coatings of various thicknesses deposited on austenitic stainless steel, X6CrNiTi18-10, by means of the cathodic arc evaporation method were investigated in a cavitation tunnel with a slot cavitator. The estimated cavitation resistance parameters of the coatings were the incubation period and total mass loss. It was found that the incubation periods of the 4 μm and 7.8 μm-thick TiN coatings were over two and half times longer than that of the uncoated X6CrNiTi 18-10 steel and the total mass losses of these coatings were approximately half lower than of the uncoated specimen. The scanning electron microscope analysis indicated that the damage process of the TiN-4 coating originates from the micro-folding and coating fracture arises on the top of the micro-folds, whiles the TiN-8 and TiN-12 coatings were removed in the form of thin flakes. The factors mainly responsible for cavitation resistance of the TiN coatings are ability to plastic deformation of the coating and coating adhesion.</abstract>

Cavitation Resistance of TiN Nanocrystalline Coatings with Various Thickness

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">To improve bioactivity of titanium and titanium, the implant surface modification by formation of self-organized TiO2 nanotube arrays with electrochemical techniques is presented. The influence of electrolyte composition and deposition parameters during anodization is characterized. The enhancement of phosphates deposition by titanium nanotubular structure is discussed. The calcium phosphate ceramics is shown to be uniformly deposited on anodized titanium surface of a nanotubular oxide layer.</abstract>

Self-Organized Nanotubular Oxide Layers on Ti and Ti Alloys

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