| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
MS&T'11 Poster Session
|
| Presentation Title |
224 Erosion and Corrosion Resistance of TiAlN/TiN
Nanomultilayer and TiAlN-Si3N4
Nanocomposite Coatings in Molten Aluminum
Alloy |
| Author(s) |
Farhad Fazlalipour, Farzad Charani, Nader Shakib, Malahat Niki Nushari |
| On-Site Speaker (Planned) |
Farhad Fazlalipour |
| Abstract Scope |
In this study, erosion and corrosion resistance of TiAlN-Si<SUB>3</SUB>N<SUB>4</SUB> nanocomposite and two nanolayered TiAlN/TiN multilayer coatings, with TiN and TiAlN working layers, were investigated in molten aluminum alloy. These coatings were applied by PVD technique over plasma nitrided core pins made of H13 steel to obtain duplex coating. Surface morphology of coatings was investigated by SEM metallography. The x-ray analysis was employed to assess coatings structure and Si<SUB>3</SUB>N<SUB>4</SUB> crystal size. An accelerated experimental approach was conducted for testing erosion and corrosion resistance by dipping and rotating coated core pins in A380 aluminum alloy melt for various period of time. SEM metallographic investigation of eroded and corroded surface showed some pitting effect. EDS analyses in back scatter mode, proved formation of Fe<SUB>x</SUB>Al<SUB>y</SUB>Si<SUB>z</SUB> intermetallic phase in the corroded holes. The nanocomposite coating provides less weight loss (WL) and percentage of eroded area (PEA) than both of nanolayered multilayer coatings. |
| Proceedings Inclusion? |
Undecided |