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    Effect of boric acid addition to seawater on wear and corrosion properties of ultrashort physical vapor deposited Ti layer on a 304 stainless steel
    (Walter De Gruyter Gmbh, 2023) Karabeyoglu, Sencer Sureyya; Eker, Bulent; Yaman, Pasa; Eksi, Olcay
    AISI 304 stainless steel specimens are deposited with Ti using physical vapor deposition method for 3, 5, and 8 min. Then, specimens are subjected to wear test with 10 and 20 N applied loads in seawater and boric acid reinforced seawater. Optical microscope and scanning electron investigations showed that ultrashort PVD process formed non-uniform Ti deposit zones on the substrate. Abrasive wear mechanism is observed for 10 N applied load and increasing the applied load to 20 N transformed the wear into adhesive which is attributed to counteract dynamic reaction of the surface. Besides, boric acid addition to seawater lowered the wear rate and coefficient of friction for all tests and stick-slip phenomenon is removed in boric acid addition. In corrosion properties, boric acid addition improved the corrosion resistance of the specimens.
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    Investigation of mechanical and frictional properties of ulexite and colemanite filled acrylonitrile-butadiene-styrene polymer composites for industrial use
    (Sage Publications Ltd, 2024) Yaman, Pasa; Karabeyoglu, Sencer Sureyya; Moralar, Aytac
    Ulexite and colemanite filled acrylonitrile-butadiene-styrene parts are manufactured by injection molding method. Tensile and wear tests are applied to reveal specific properties of composite parts. Various characterization methods are used to confirm the filler-matrix interactions, polymer melt flow, friction mechanisms, and fracture modes. This study investigated the use of ulexite and colemanite as fillers in acrylonitrile-butadiene-styrene composite parts, focusing on their impact on mechanical and frictional properties. Results showed that the addition of ulexite and colemanite fillers significantly improved mechanical properties such as compared to pure ABS, however ulexite filler showed much better performance compared to colemanite. In terms of wear test, ulexite filled ABS specimen showed a smooth wear while pure and colemanite filled ABS provided severe wear characteristics. These findings have implications for the development of high-performance composite materials for use in industries such as automotive and aerospace. Graphical Abstract