Nano-Coating Texture on the Shear Slip Surface in Rocky Materials

Abstract:

Through SEM observation from natural and experimental examples of rocky materials, nanocoating texture was found on the shear slip surface (plane, lamellae). Our researching suggested that the nanocoating possesses some textural characteristics including granular, delaminating and rheological one. In general, single nano-sized grain (40-80 nm in diameter) with moderate roundness and sphericity could aggregate into the compound grain, and thickness of the nanocoating (thin shell, film) might reach from μm to cm scale in different rocky materials. Development of the nanocoating textures of shear slip surface could be subdivided into three stages, i.e. strain hardness, strain softening and strain decaying stage, and its forming mechanism is quite similar to the “tribological white layer” which is very common phenomena in metallography. Furthermore, it is determined that the nanocoating lamellae in rocky materials might be capable to constitute a shelter for a reservoir.

• Periodical: Advanced Materials Research (Volume 669)
• Pages: 108-114
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.669.108
• Online since: March 2013
• Authors: Yan Sun, Shao Yong Jiang, Zhou Wei, Xian Cai Lu
• Keywords: Nanocoating, Rheology, Rocky Material, Shear Slip, Smear Efficiency

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