Advances in Surface Engineering IV: Poster Session
Sponsored by: TMS Materials Processing and Manufacturing Division, TMS: Surface Engineering Committee
Program Organizers: Arif Mubarok, PPG; Bharat Jasthi, South Dakota School of Mines & Technology; Tushar Borkar, Cleveland State University; Mary Lyn Lim, PPG Industries; Rajeev Gupta, North Carolina State University
Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center
Session Chair: Mohammad Umar Farooq Khan, Texas A&M University
F-23: Plasma Functionalization of Packaging Waste Derived Sustainable Carbon for Composite Reinforcement: Vijaya Rangari1; Zaheeruddin Mohammed1; Shaik Jeelani1; 1Tuskegee University
The carbon obtained through pyrolysis is generally limited in their use due to their hydrophobic and inert surfaces. The nature of functional groups introduced across the surface of carbon materials is critical to the development of advanced materials for applications where surface-specific interactions or reactions determine performance. Semicrysllaine carbon was synthesized from sustainable starch based waste packaging material using a simple high-pressure/temperature pyrolysis reaction. Thus, obtained carbon was further modified using ultra sonication method. The surface energies of the biochar carbon were altered using low temperature plasma treatment processes in presence of Sulphur Hexafluoride (SF6) gas. Plasma treated carbon was characterized for surface functionality changes. It was found that plasma treatment was effective in incorporating fluorine related functionalities on carbon surface and can be used as fillers for polymer composite application.
F-24: Role of Surface Mechanical Attritions Processing Conditions on the Corrosion Behavior of Aluminum 7075 Alloys: Vikrant Beura1; Kiran Solanki1; 1Arizona State University
In this work, a gradient nano-grained layer was induced on the aluminum 7075 alloys by surface mechanical attrition treatment (SMAT). Microstructure variations through SMAT processing were characterized through X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. A gradient nano-grain layer with precipitation of the Al-Cu-Si phases has been observed near the SMAT surface. In addition, the surface close to the SMAT layer was also found to be deprived of inherent Mg2Si and Al7Cu2Fe phases. The potentiodynamic polarization showed a decrease in anodic and cathodic reaction rates through the SMAT processing. Furthermore, the electrochemical impedance spectroscopy (EIS) demonstrated a stable and coherent oxide layer on the SMAT surface. The oxide layer and corrosion film formed on the surface were further analyzed through various surface spectroscopy techniques such as X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS).