Advanced Functional and Structural Thin Films and Coatings: Coating Technologies and Surface Structuring for Tools
Sponsored by: TMS: Thin Films and Interfaces Committee
Program Organizers: Ramana Chintalapalle, University of Texas at El Paso; Adele Carrado, University of Strasbourg; Gerald Ferblantier, University of Strasbourg - IUT LP / ICube Laboratory - CNRS; Karine Mougin, Cnrs, Is2m; Heinz Palkowski, Clausthal University of Technology; Nuggehalli Ravindra, New Jersey Institute of Technology

Wednesday 4:00 PM
March 2, 2022
Room: 252B
Location: Anaheim Convention Center

Session Chair: Heinz Palkowski, TU-Clausthal IMET; Karine Mougin, CNRS- IS2M

4:00 PM Introductory Comments

4:10 PM
Performance of nc-AlTiN/Si3N4 and ZrO2/Al2O3 Coated Carbide Inserts in Dry Turning of AlSI304 Stainless Steel: Kaushik V Prasad¹; Sharma SC²; Adarsha H¹; Deepak J¹; ¹Jain University; ²Director,National Assessment and Accreditation Council
    Austenitic stainless steel is a “hard to cut” material. The refractory ceramic coatings like nc-AlTiN/Si3N4 and ZrO2/Al2O3 can be used as a functional coating on cemented carbide insert to improve performance in machining. In present work we deposit the mentioned coatings using physical vapour deposition. We characterize the coatings for its microstructure, micro vickers hardness, nanoindentation. nc-AlTiN/Si3N4 coatings showed equiaxed dense grain structure while ZrO2/Al2O3 coatings had predominantly columnar grained structure. We perform cutting test with a speed range of 175 m/min – 250 m/min. It was found that nc-AlTiN/Si3N4 coatings exhibited a hardness of 28GPa and showed highest elastic recovery of 400nm in nanoindentation test while ZrO2/Al2O3 coatings showed hardness of 24 GPa and elastic recovery during nanoindentation test was found to be around 700nm. It was observed that nc-AlTiN/Si3N4 coated inserts showed flank wear of around 1200痠

4:30 PM
In-air Polymerization and Crosslinking of Monomers during Electrospray Deposition: Catherine Nachtigal¹; Michael Grzenda¹; Jonathan Singer¹; ¹Rutgers University
    Electrospray deposition (ESD) is a coating technique in which a solution is passed through a charged capillary, causing the solution to disperse into child droplets through a series of Coulomb fissions until the droplets reach a grounded target. This process is advantageous due to its ability to create nanostructured self-limiting electrospray deposition (SLED) coatings with certain solutions. A large disadvantage is its use of a large amount of solvent. This is wasteful and causes sprays to take a long time to deposit a film. To alleviate this, this study focuses on spraying monomers, which can be sprayed at a much higher weight percentage than their corresponding polymers, blended with a photoactivated polymerizing agent and crosslinker under ultraviolet light to create polymers mid-spray. It was found that the spray, using methyl methacrylate as the monomer, deposited a film consisting of oligomeric polymers that could be optionally crosslinked.

4:50 PM
Polymeric Coatings Embedded with Green Anti-corrosive Pigment for Corrosion Inhibition of Steel: Muddasir Nawaz¹; Abdul Shakoor¹; Ramazan Kahraman¹; M. F. Montemor²; ¹Center for Advanced Materials, Qatar University; ²Universidade de Lisboa
    Natural Gum Arabic (GA) used as a corrosion inhibitor and loaded into cerium oxide nanoparticles (CONPs) to develop an environment-friendly anti-corrosive pigment used in the epoxy formulation for corrosion protection of steel in the marine environment. Epoxy coatings containing CONPs, without GA, were also prepared as reference. High-Resolution Transmission Electron Microscopy (HR-TEM) and Fourier Transform infrared spectroscopy (FTIR) revealed the successful loading of GA into the CONPs. Thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET) techniques confirmed approximately ⁓30.0 wt. % loading of GA into the CONPs. Electrochemical impedance spectroscopy (EIS) demonstrated the anticorrosion properties of the epoxy coatings modified with the GA loaded CONPs when compared to reference coatings. Corrosion protection mechanism demonstrates that GA loaded CONPs (anti-corrosive pigment) act as a filler material for epoxy coating and it can also aid the recovery of the protective properties of the epoxy coating leading to the formation of a stable protective layer.

5:10 PM Concluding Comments