|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P1-124: Novel Solid Lubricants for Use in Multifarious Environments at High Load and Sliding Speeds
||Aditya Venkata Ayyagari, Kalyan C. Mutyala, Anirudha V Sumant
|On-Site Speaker (Planned)
||Aditya Venkata Ayyagari
Existing solid lubricants such as MoS2 and Graphite lack the adaptability to dynamically changing atmospheres. This study presents results of novel 2D materials based solid lubricant developed at Argonne National Laboratory that overcame this drawback, showing exceptional performance in multifarious environments namely, ambient, dry nitrogen and vacuum. Solution processed 2D-MoS2 and Graphene-oxide were sonixed and deposited on stainless steel substrate using spray-coating technique. The tribological performance of the coatings showed very low friction and wear, at 0.03 (dry nitrogen); 0.05 (vacuum); 0.08 (ambient) compared to steel-on-steel (0.78). Raman spectroscopy of the tribolayers showed increased MoS2 peak intensity with normal load and sliding velocity. This in conjunction with absence of MoOx peaks indicates a strong resistance to intercalation with moisture and oxygen. TEM revealed highly aligned MoS2 packets were sandwiched between graphene-oxide layers which may help in preventing oxidation of MoS2 and led to the excellent tribological performance in all environments.