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The interyarn friction properties of fabrics can be enhanced by appropriate surface treatment of fibers. This study focuses on evaluating the interyarn friction properties of Kevlar and Glass fabrics that were coated with ZnO nanowires through different growth cycles. ZnO nanowires were coated onto woven Kevlar and Glass fabrics through a low temperature hydrothermal solution method. Longer growth time coupled with periodic refreshing of growth solution and washing of fabrics was found to be a favorable condition for uniform and precipitate free growth of ZnO nanowires. The effects of ZnO nanowire coating on the tensile and interyarn friction properties of fabrics were measured. In general, after ZnO nanowire coatings, Kevlar fabrics remained equally flexible as that of bare fabric while Glass fabrics became relatively stiff and brittle. The interyarn friction properties of Kevlar fabrics were found to be high under 100 N transverse tension while the transverse tension was found to have negligible or insignificant effect on the interyarn friction properties of Glass fabrics that were used in this research. Compared to bare fabric, Kevlar fabric coated with ZnO nanowires for extended duration showed 266% and 293% increase in yarn pull out load and energy, respectively under 100 N tension. Compared to bare fabric, Glass fabric coated with ZnO nanowires for extended duration showed 517% and 376% increase in yarn pull out load and energy, respectively under 5 N tension. These significant improvements in interyarn friction properties were attributed to mechanical interlocking and accumulation of ZnO nanowires at the intersection of yarns.

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The microstructure of a polycrystalline binary alloys has offers a critical effect over the creep behavior and its characteristics, due to its vital role over the diffusion behavior of various atoms through the grain boundaries which leads to alter its mechanical and creep characteristics. In this study, the creep behavior of nickel-chromium binary alloy has been computed under compression mode under varying grain size (4.5 nm, 3.7 nm and 2.9 nm), pressure (1 GPa, 2 GPa and 3GPa) and the temperature (600 K and 900 K) to examine its influence over the creep characteristics of nickel-chromium binary alloy. Through this examination, it is found that the temperature has offer greater influence over the creep characteristics followed by the grain size and the pressure, owing to its superior influence over the diffusion behavior of nickel-chromium binary alloy. Additionally, the analysis of vacancy formation and the displacement of nickel and aluminum atoms have confirmed that the diffusion characteristic plays a vibrant role on the creep mechanism of nickel-chromium polycrystalline alloy.

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