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This paper investigates the reinforcement of rigid polyurethane foams with carbon nanotubes or graphite in order to improve their mechanical and thermal properties as well as fire resistance. A small addition of carbon nanotubes (up to 0.05wt.%) improves the mechanical strength by about 20%, which was attributed to the strengthening effect of nanotubes and the change in the foam structure, i.e. the...
In the last decade a great interest has been observed in the field of nanoscale materials. Commercially pure titanium as well as titanium alloys have become predominant in implantology. Low hardness and poor tribiological properties of titanium alloys may become critical factor when wear phenomena are involved. One of the methods that allow the change of properties of Ti alloys is the production of...
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