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A new method for production of bimetallic rods, utilizing the equal channel angular extrusion (ECAE) process has been introduced before by previous researchers, but no attempt has been made to assess the effect of different temperatures and holding times in order to achieve a diffusional bond between the mating surfaces. In present research copper sheathed aluminum rods have been ECAEed at room temperature and subsequently held at a constant ECAE pressure, at different temperatures and holding times to produce a diffusional bond between the copper sheath and the aluminum core. The bonding quality of the joints was examined by shear strength test and a sound bonding interface was achieved. Based on the results, a bonding temperature of 200 °C and holding time of 60–80 min yielded the highest shear strength value.

Novel magnetic titanium dioxide nanoparticles decorated with methyltrimethoxysilane (Fe 3 O 4 @TiO 2 -MTMOS) were successfully fabricated via a sol-gel method at room temperature. The synthesized material was characterized using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and vibrating sample magnetometry. The removal efficiency of the adsorbent was evaluated through the adsorption of methylene blue (MB) dye from water samples. The adsorption isotherm and kinetics were evaluated using various models. The Langmuir model indicated a high adsorption capacity (11.5 mg g −1 ) of Fe 3 O 4 @TiO 2 -MTMOS. The nanocomposite exhibited high removal efficiency (96%) and good regeneration (10 times) compared to Fe 3 O 4 and Fe 3 O 4 @TiO 2 at pH = 9.0. Based on the adsorption mechanism, electrostatic interaction plays a main role in adsorption since MB dye is cationic in nature at pH = 9, whereas the adsorbent acquired an anionic nature. The newly synthesized Fe 3 O 4 @TiO 2 -MTMOS can be used as a promising material for efficient removal of MB dye from aqueous media.KEYWORDS adsorption isotherm and kinetics, Fe 3 O 4 @TiO 2 nanoparticles, Fe 3 O 4 @TiO 2 -methyltrimethoxysilane nanocomposite, methylene blue dye

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