Mechanical Properties of Epoxy/Clay Composite Coatings on an X65 Steel Substrate

• DOI: 10.1080/23311916.2021.1944015
• Publication Date: 2021-07-19T15:56:41Z
• Authors: Odette F. Ngasoh; Vitalis C. Anye; Emeso B. Ojo; Tido T. Stanislas; Abdulhakeem Bello; Benjamin Agyei-Tu...; Kingsley Orisekeh; Oluwaseun K. Oyewole; Nima Rahbar; Winston O. Soboyejo
• Keywords: Indentation

This paper presents the results of a combined experimental and theoretical study interfacial mechanical properties epoxy/clay composites coatings on mild steel substrate. was studied using nano-indentation Brazil Disk techniques to determine Young's moduli, hardness values mode mixity characteristics composite coatings. The moduli reinforced comprising 1, 3, 5 wt. % montmorillonite clay particles are shown improve, respectively, by about 23%, 58%, 50% while respective increased 46%, 80%, 88%, relative those pristine epoxy. measured have also compare favorably with predictions from theories (rule-of-mixture shear lag theories). toughness between X65 increases increasing mixity. is associated crack-tip shielding crack deflection bridging. trends in mode-mixity dependence fracture consistent simplified zone, normal row models (at lower mixity). insights observations profiles incorporated into zone for estimation shielding. implications discussed design attractive combinations properties.