3 results listed
Boron nitride (BN) utilizes a wide range of industrial applications (e.g. ceramic composites, lubricants,
surface coatings, etc.) because of its low density, high thermal conductivity and superb oxidation resistance
[1-4]. For this reason, BN nanoplates were synthesized by arc discharge method. Tungsten electrodes were
used as both anode and cathode. The cathode were drilled and filled with boron nitride powder. The synthesis
was done under liquid nitrogen environment under 50A DC current and 30V. The synthesized boron nitride
nanoparticles with nanoplate morphology have a diameter ∼250 nm with thickness ∼50 nm. After BNNP
had been synthesized, it was functionalized. Firstly, BNNP which were fabricated by arc discharge oxidized
with H2SO4 solution. Subsequently, oxidized BNNP added (3-Aminopropyl) triethoxysilane (APTES)
solution and dried at 100 °C for 2 h. As a result, functional BNNP was characterized by FT-IR and SEM.
International Iron & Steel Symposium
UDCS
Tugay ÜSTÜN
Safa POLAT
Ahmet Avcı
Iron oxide nanoparticles have been reported to be widely used in many biological applications such as
magnetic resonance imaging, anticancer agents, contrast enhancement, tissue repair, and detoxification of
biological fluids. The nanoscale size of the iron oxide particles synthesized for use in such applications gives
them super magnetic properties. Arc discharge method is one of the simplest methods to be used in
nanoparticle production in terms of both feasibility and efficient results. Therefore, arc discharge method
has been used in the synthesis of iron oxide nanoparticles for use in such applications. In this method, which
simply consists of an anode, cathode and a power source, tungsten electrodes were used to obtain iron oxide
nanoparticles. The cathode was drilled and filled with iron powder. The synthesis was carried out in deionize
water under 50A DC current and 30V. The synthesized powders were characterized by fourier transform
infrared spectroscopy (FTIR), transmission electron microscope (TEM), scanning electron microscope
(SEM) electron dispersive X-ray analysis (EDX).
International Iron & Steel Symposium
UDCS
Safa POLAT
Tugay ÜSTÜN
Ahmet Avcı
Drilling operation is one of the most frequently used process in manufacturing industry.
Especially in machine manufacturing sector, drilling operations take one third of the total
production time. Drilling operation cost a lot, not only because of taking some serious time of total
production time, but also because of the drill usage for this process. In this study, the cost
comparison of three different methods evaluated for drilling operation in CNC machines. These
methods are drilling cycle (G81), high-speed peck drilling cycle (G73) and deep hole peck drilling
cycle (G83). The experiments were performed according to the cutting parameters suggested by
the cutting tool company and the machining times measured in these three different methods. A
novel program coded on Microsoft Visual Studio 2017 C#, which is able to calculate from machine
amortization to workmanship, the whole process cost. Process costs can be calculated according
to the number of holes in these different methods, through this program. Furthermore, drilling
operation costs can be calculated for different cutting parameters too.
International Data Science & Engineering Symposium
IDSES
Tugay ÜSTÜN
Yakup TURGUT