TY  - JOUR
T1  - Effects of Natural Rock and Nano-TiO<sub>2</sub> Additives on Al<sub>2</sub> O<sub>3</sub> Layer 
Deposited on Al Alloys by Micro-Arc Oxidation (MAO)
AU - Murad, Farqad Saleem AU - Abdalmajeed, Elham AU - Awad, Samir Hamid 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 5
SP  - 1201
EP  - 1209
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.1201.1209
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.1201.1209
KW  - rock additive and wear resistance
KW  -hardness
KW  -micro arc oxidation
KW  -Aluminium alloy
KW  -structure
KW  -Iraq
AB  - Ceramic coatings on Al alloys were prepared via. micro arc oxidation process using natural
rock (10 g/L fired and unfired porcelanite) and (2.4 g/L) nano-TiO<sub>2</sub> additives. The phase composition, 
microstructure (SEM and EDX), micro hardness, thickness, roughness and wear resistance of the coatings were
studied. The results showed that the thick and hard (&gamma;-Al<sub>2</sub> O<sub>3</sub> ceramic coatings can be deposited by MAO
process on Al alloys using electrolytes contained fired porcelanite with modified tribological properties and
less porosity and its non-uniform distribution in the structure. The addition of nano-TiO<sub>2</sub> recorded the highest 
hardness and reduced the pore size and tunnels in coatings structure.
ER  -