Durkaya, Göksel

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Profile URL
https://hdl.handle.net/20.500.14411/8000
Name Variants
Durkaya, G.
Durkaya, Goksel
Durkaya, Göksel
G., Durkaya
D., Goksel
D.,Göksel
D.,Goksel
Göksel, Durkaya
G.,Durkaya
Goksel, Durkaya
Durkaya,G.
Job Title
Doktor Öğretim Üyesi
Email Address
goksel.durkaya@atilim.edu.tr
Main Affiliation
Department of Metallurgical and Materials Engineering
Status
Former Staff
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID

Sustainable Development Goals

SDG data is not available
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Scholarly Output

8

Articles

3

Views / Downloads

26/114

Supervised MSc Theses

1

Supervised PhD Theses

0

WoS Citation Count

10

Scopus Citation Count

15

WoS h-index

1

Scopus h-index

1

Patents

0

Projects

0

WoS Citations per Publication

1.25

Scopus Citations per Publication

1.88

Open Access Source

4

Supervised Theses

1

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JournalCount
8th International Advances in Applied Physics and Materials Science Congress and Exhibition (APMAS) -- APR 24-30, 2018 -- Fethiye, TURKEY3
20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016 -- 20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016 -- 9 October 2016 through 13 October 2016 -- Dublin -- 1260471
BOR DERGİSİ1
Ceramics International1
International Journal of Mechatronics and Manufacturing Systems1
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COAR Resource Type: text::journal::journal article

Scholarly Output Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    Article
    Citation - WoS: 10
    Citation - Scopus: 14
    The Adhesion and Tribological Properties of C-Bn Films Deposited by High Power Impulse Magnetron Sputtering
    (Elsevier Sci Ltd, 2019) Efeoglu, Ihsan; Totik, Yasar; Keles, Aysenur; Gulten, Gokhan; Ersoy, Kivilcim; Durkaya, Goksel
    Nitride based films are very important for industrial applications due to their mechanical and tribological properties. Among the nitride based films, c-BN films have superior properties. But, the adhesion properties of c-BN films deposited using magnetron sputtering with different power sources are inadequate generally. Recently, High Power Impulse Magnetron Sputtering (HiPIMS) power sources have been used to increase the adhesion of coatings and there is no open literature about c-BN deposited using HiPIMS. From this point, c-BN films were coated on 4140 steels using HiPIMS with closed-field unbalanced magnetron sputtering (CFUBMS). In the process, two B4C, two Ti targets and Ar + N-2 gas mixture were used to synthesize c-BN films. The amount of N-2 was altered as 2.5, 3.5 and 4.5sccm. The characteristic properties of c-BN films were analyzed using SEM, XRD and FT-IR. The mechanical properties were tested using a microhardness and scratch testers. The tribological properties were performed by a pin-on-disc tribotester under atmosphere, argon, and oil test conditions. The results showed that the properties of c-BN films deposited by HiPIMS are interesting. The hardness values were obtained above 36 GPa and the maximum critical load was reached to 80 N. Also, the minimum CoFs were observed as expected from the oil condition, in that case, the lowest CoF (mu congruent to 0.06) was noted from the hardest coating.
  • Thumbnail Image
    Article
    Citation - Scopus: 1
    Wear Resistance Performance of Boron Nitride Coatings on End Milling Cutters
    (Inderscience Publishers, 2017) Çetin,B.; Durkaya,G.; Kurtuldu,H.; Hacaloglu,T.; Gurbuz,M.; Kaftanoǧlu,B.
    For defence industry applications, the machining of ultra-high strength steels or aluminium with ballistic temper grades is a widely-used operation. Therefore, it is a great challenge to find an optimum solution for tool wear. In that sense, tool coatings provide various solutions for machining of hard materials or improving wear resistance. A cost-effective tool coating provides longer tool life, hence decreases the tool cost contribution in production. Boron nitride (BN) coating could be thought as a new generation coating method compared to titanium nitride (TiN), aluminium titanium nitride (AlTiN) or silicon aluminium oxy-nitride (SiAlON). BN coating material has a great strength, toughness and chemical stability whereas it has an important disadvantage of high intrinsic stress. In this industrial study, standard end mill cutters are coated with BN material by physical vapour deposition (PVD) method. The coated and uncoated milling tools are compared according to their wear resistance and the obtained workpiece surface roughness. First results of the study are presented in this paper. © 2017 Inderscience Enterprises Ltd.
  • Thumbnail Image
    Article
    Synthesis and Investigation of Structural-Mechanical Properties of C-Bn Based Bn Thin Films
    (2017) Efeoğlu, İhsan; Totik, Yaşar; Keleş, Ayşenur; Ersoy, Kıvılcım; Durkaya, Göksel
    C-BN films are candidate material to diamond due to their promising properties. Although some properties of c-BN films are better than diamond, adhesion properties between the substrate and the film are very poor. In this study, c-BN films were deposited by closed-field unbalanced magnetron sputtering system onto 4140 steels in Ar/N2 atmosphere. The c-BN films coated in three different N2flow rates. The coated specimens were characterized by SEM and X-ray diffraction techniques. The bonding state of B, N and C elements were obtained using XPS. The mechanical properties of the c-BN films were tested by micro-indentation. The adhesion properties between substrate and the film were investigated by using scratch test. The tribological properties were carried out using pin-on-disc in atmospheric conditions. Our results showed that the c-BN films exhibited very dense and columnar microstructure. The maximum critical load was read 23 N in the softest c-BN film. The maximum and minimum hardness were measured 69 GPa and 33 GPa, respectively. When the hardness was increased the friction coefficient was decreased. The lowest friction coefficient (0.15) was obtained from the hardest film and the highest friction coefficient (0.65) was obtained from the lowest hardness