Yazar "Yaşar, Mustafa" seçeneğine göre listele

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  • Küçük Resim
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    The effect of aging heat treatment on the sliding wear behaviour of Cu-Al-Fe alloys
    (Elsevier Sci Ltd, 2009) Yaşar, Mustafa; Altunpak, Yahya
    Aluminium bronze is one of the versatile wear resisting engineering materials that work under a corrosive environment with high stress. Alloys were produced by casting of C95200 and C95300 aluminium bronzes and aged. Wear behaviors, friction coefficient, and microstructure were investigated. The results indicated that a suitable aging treatment resulted in the formation of smaller alpha grains than their cast condition. These small alpha grains could improve the hardness and wear resistance of Cu-Al-Fe alloys. But with increasing aging temperature, the wear rate of the aged Cu-Al-Fe alloys initially decreased and then began to increase. (C) 2008 Elsevier Ltd. All rights reserved.
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    Effect of changing of filling materials in NR-SBR type elastomer based rubber materials on mechanical properties
    (Polymer Soc Korea, 2014) Bülbül, Şaban; Yaşar, Mustafa; Akçakale, Nurettin
    The effects of different filling materials and stabilizers in polymer based materials that are used as shoe soles in the shoemaking industry on the mechanical properties (strength, failure, tensile, tearing, bending etc.) of the final products have been examined in this study. Natural rubber (NR RSS3) and styrene-butadiene rubber (SBR 1502) were used as the main matrix material. New compounds were formed by replacing the fillings in the general compound of the existing factory (SiO2, CaCO3) with 40% (1200 g) blast furnace flue dust, rice husk, reclaimed rubber (recycled) and wood ash. Comparison of the new compounds with the existing compounds revealed a decrease in hardness, density, dimension stability, bending, tearing, % elongation and failure strength and an increase in wearing.
  • Küçük Resim
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    The effect of wood ash on the mechanical properties of rubber compounds
    (Inst Za Kovinske Materiale I In Tehnologie, 2019) Bülbül, Saban; Akçakale, Nürettin; Yaşar, Mustafa; Gökmeşe, Hakan
    In this study, the effect of adding wood ash (oak tree) on the mechanical properties (tensile, abrasion, tearing, elongation %, etc.) of NR/SBR-type elastomer materials was investigated. Five different compounds were prepared by adding 16 %, 32 %, 48 % and 64 % wood ash to the filler and additive materials in the general composition (G). The mechanical test results and production costs of the new compounds composed were compared between themselves and with the G compound. The fracture surfaces of the compounds as well as the shape and morphological distribution of the fillers in the rubber matrix were examined using a Scanning Electron Microscope (SEM). As a result of the experimental studies, it was found that the new compounds composed had an increased tensile and tearing strength. abrasion amounts, bending capability, unit elongation amounts and densities in comparison to the G compound. A decrease was observed in the hardness values and material costs (production cost) of the compounds.
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    Investigation of Yield and Yield Components of Some Flax (Linum usitatissimum L.) Varieties in Ankara Ecological Conditions
    (2023) Bağci, Muhittin; Arslan, Yusuf; Yaşar, Mustafa; Işler, Berfin; Ünal, Sefa
    This study was carried out to determine the effects of some flax varieties on yield and yield components in Ankara ecological conditions in 2021. The study was established with 10 flax varieties 3 replications according to the Randomized Complete Block Design. In the study, plant height (cm), first branch height (cm), number of branches per plant (pieces), number of seeds in the capsule (seed capsule-1), 1000 seed weight (g), number of encapsulated branches per plant (pieces), oil yield (kg ha-1), protein ratio (kg ha-1) and seed yield (kg ha-1) traits were examined. As a result of the research; There were statistically significant differences at the level of 1% between varieties in terms of yield and yield components. In the study, the highest seed yield, oil yield and protein yield (1806 – 599.7 – 428.5 kg ha-1) were obtained from Clli-1412 variety.