Corrosion Characterisation of Al-Cu Reinforced In-Situ TiB₂

Abstract

Abstract. Aluminium (Al) based in-situ metal matrix composites (MMCs) have better properties and performance compared to ex-situ MMCs. In this research, aluminium-copper (Al-Cu) alloy was reinforced with 3 and 6wt.% titanium diboride (TiB 2 ). Al-MMCs has been fabricated with salt route reaction process at 800 °C via potassium hexafluorotitanate (K 2 TiF 6 ) and potassium tetrafluoroborate (KBF 4 ) salts. Hardness vickers tester and Gamry-Electrod Potentiometer were used to characterize the hardness properties and to determine the corrosion rate of Al-Cu alloys. From results obtained, increased TiB 2 contents will increase the hardness of Al-Cu alloys. Increased of TiB 2 contents also will increase the corrosion rate of Al-Cu alloys. Al-Cu with 3wt.%TiB 2 gave the good properties of corrosion when the wear rate recorded the lowest value compare to Al-Cu alloy itself and 6 wt.% TiB 2 . The corrosion rate of Al-Cu with 3wt.TiB 2 was 16.15, while Al-Cu and Al-Cu-6wt%TiB 2 were 22.5 and 58.7 mm/y respectively.

Corrosion Behaviour of Al-Si Cast Alloy Reinforced with Titanium diboride (TiB2) and Scandium (Sc)

“…al. [7] used GamryElectrode Potentiometer for measuring the corrosion rate of Al-Cu alloys. From their experiment, anodic and cathodic polarization curves were plotted with the presence of the reference sample and Al-Cu alloys in 0.1 M HCl solution in current density range from 2 to 6 mA/cm2.…”

Characterization of in Situ Zirconium Diboride (Zrb2) Reinforced by Aluminium-Copper (Al-Cu) Metal Matrix Composites

“…The advancement of microhardness connected to multistrength mechanism which is ZrB 2 diffused into Cu lattice together with enhances the load transfer from matrix to reinforcement. All along the development solidification in cast composites, ZrB 2 constituents are going to manage to gain in dislocation density[27]. Since, in situ fabrication is endorsed; homogeneous connection among matrix along with reinforcement prevails in alloys.…”