Department of Metallurgical and Materials Engineering

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Ünalan, Hüsnü Emrah (158)
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Recent Submissions

Tungsten oxide filled nanofibers for optical limiting in near infrared region PEPE, YASEMİN; AKKOYUN, ŞERİFE; Asci, Nurcan; Cakır, Onuralp; Tutel, Yusuf; Emrah Unalan, Husnu; KARATAY, AHMET; ELMALI, AYHAN (2024-09-01) In this study, tungsten trioxide (WO3) nanoparticles synthesized by a slightly modified reduction method were used as nanofillers in polyvinylpyrrolidone (PVP) nanofibers produced via electrospinning. SEM images revealed w...
Search for carbon additives in Co-free Ni(OH)2 cathodes for NiMH batteries Darıcıoğlu, Necdet Özgür; Öztürk, Tayfur (2024-06-15) In this study, carbon black and plasma black are used as conductive additives solely or in combination to explore the possibility of replacing cobalt based compounds as additive in NiMH cathodes. Two production methods, na...
Lightweight, flexible, and antimicrobial X-ray shielding composites with liquid metal-derived bismuth-tin core-shell particles Dincer, Orcun; Şeyda, Doğu; AKCA, GÜLÇİN; Cengiz, Burak; Gorur, Mustafa Caner; Doğanay, Doğa; Ünalan, Hüsnü Emrah; Çınar, Simge (2024-06-01) The extensive use of low-energy X-rays in clinical diagnostics increased radiation exposure, growing concerns for the health of patients and healthcare professionals. Lead has long served as a traditional material for radi...
Laser powder bed fusion of oxide dispersion-strengthened IN718 alloys: A complementary study on microstructure and mechanical properties Yalçın, Mehtap; Gokbayrak, A.A.; Duygulu, O.; Derin, Cevat Bora; Poplawsky, J.D.; El-Atwani, O.; Aydoğan Güngör, Eda (2024-06-01) In this study, two new grades of oxide dispersion strengthened (ODS) Inconel 718 (IN718) alloys were designed by the thermochemical CALPHAD method and produced by laser powder bed fusion (LPBF) technique. Alloys designated...
Heat activated VO2 (R) cathodes for high-performance aqueous zinc ion batteries Aydogdu, Busra; Aydin, Selay; Sasikala, Suchithra Padmajan; Ünalan, Hüsnü Emrah; Kim, Sang Ouk; YÜKSEL, RECEP (2024-05-10) We introduce a novel approach for design and production of vanadium dioxide (VO2) cathodes activated by heat, specifically tailored for use in aqueous zinc-ion batteries (ZIBs). Our cathodes exhibit distinctive metal-insul...
Cutting-edge advancements in MXene-derived materials: Revolutionary electrocatalysts for hydrogen evolution and high-performance energy storage Khan, Muhammad; Hussain, Amjad; Saleh, Muhammad Tahir; Ibrahim, Mohammad; Attique, Faisal; Sun, Xiaohui; Ünalan, Hüsnü Emrah; Shafi, Muhammad; Khan, Yaqoob; Khan, Idrees; Ragab, Ahmed H.; Hassan, Abeer A.; Ali, Rawaid; Ali, Zafar; Khan, Abdul Jabbar; Zada, Amir (2024-05-01) MXenes belong to a set of 2-dimensional (2D) materials composed of transition metals, carbides, nitrides, and carbonitrides demonstrated unique properties in several fields including catalysis and energy storage. This revi...
Residual Stress Gür, Cemil Hakan (ASM International, 2024-05-01) This article examines residual stresses in quenched and surface-hardened steels by focusing on its theoretical background, formation mechanisms of residual stress, effects of tempering and cryogenic cooling on residual str...
Effect of microwave heating on the interdiffusion in BaTiO3–SrTiO3 binary ceramic system Süer, Başar; Dericioğlu, Arcan Fehmi (2024-04-15) An investigation on the effect of microwave heating (2.45 GHz) on the interdiffusion process was carried out and compared with conventional heating for BaTiO3–SrTiO3 binary system in the temperature range of 1200–1400 °C. ...
Flow mechanisms and their influence on the properties of EGaIn-graphene-poly(ethylene) oxide composites during material extrusion-based additive manufacturing Tandel, Ruchira; Sargın, Irmak; Gozen, B. Arda (2024-03-25) Polymer composites featuring room temperature liquid alloy particles complimenting other conductive fillers enable unique thermal and electrical properties. Direct-ink-writing approach is an intriguing processing path for ...
Development and directed energy deposition of high strength Hf5Mo15Nb35Ta25Ti20 refractory high entropy alloys Özalp, Ali; Okuyucu, Can; Koc, B.; El-Atwani, O.; Aydoğan Güngör, Eda (2024-03-01) In this study, a novel HfMoNbTaTi refractory high entropy alloy was designed by empirical calculations and CALculation of PHAse Diagram (CALPHAD) method by using ThermoCalc software. Directed energy deposition (DED) based ...
The effects of SLM process parameters on the relative density and hardness of austenitic stainless steel 316L Bakhtiarian, Mohammadamin; Omidvar, Hamid; Mashhuriazar, Amirhossein; Sajuri, Zainuddin; Gür, Cemil Hakan (2024-03-01) Selective Laser Melting (SLM) process parameters significantly influence the microstructure and mechanical properties of the final product. Using the Taguchi optimization method, this investigation refined 316L austenitic ...
Determination of the anisotropy in mechanical properties of laser powder bed fusion Inconel 718 by ultrasonic testing Alay, Tugce Kaleli; Cagirici, Mehmet; Yagmur, Aydin; Gür, Cemil Hakan (2024-02-01)
Enhanced nonlinear absorption and photoluminescence properties of Zn, Fe, Cu, V and Ni doped MoO<sub>3</sub> transition metal oxide thin films PEPE, YASEMİN; Tutel, Yusuf; Ucar, Ali Deniz; Cevik, Eda; KARATAY, AHMET; Ünalan, Hüsnü Emrah; ELMALI, AYHAN (2024-02-01) In this study, the effect of the dopant element on the linear, nonlinear absorption and optical limiting properties of ultrasonically sprayed MoO3 thin films is presented. The linear optical results showed an increase with...
Synergistic effect of nanostructured topography and CNF incorporation into silk fibroin films enhances mouse neuroblastoma cell functions MİMİROĞLU, DİDEM; Tufan, Yiğithan; Yanık, Tülin; Ercan, Batur (2024-02-01) Neural guidance channels (NGCs) are tubular structures placed between distal and proximal ends of a damaged nerve to support nerve regeneration process. Although there are numerous studies focusing on investigation of the ...
Microstructure, mechanical properties, and bone cell interactions of ZTA composites reinforced with BN Buyuker, Gokce Ata; Tufan, Yiğithan; Kayan, Gizem Ozge; Ercan, Batur; Akın Karadayı, İpek; Göller, Gültekin (2024-01-01) Due to their remarkable mechanical properties and biocompatibility, zirconia toughened alumina (ZTA) based composites are preferred materials for dental and orthopedic uses. This study focuses on the production and charact...
Visible-light optical limiting of vanadia–polyvinylpyrrolidone nanofibers PEPE, YASEMİN; Tutel, Yusuf; AKKOYUN, ŞERİFE; Asci, Nurcan; Cevik, Eda; KARATAY, AHMET; Ünalan, Hüsnü Emrah; ELMALI, AYHAN (2024-01-01) In this work, vanadium pentoxide (V2O5) nanoparticles-filled electrospun polyvinylpyrrolidone (PVP) nanofibers were investigated systematically at various nanofiller weight percentages (8 and 10 wt%) and input intensities ...
Exploiting Saturation Regimes and Surface Effects to Tune Composite Design: Single Platelet Nanocomposites of Peptoid Nanosheets and CaCO3 Uçar, Şeniz; Nielsen, Anne R.; Mojsoska, Biljana; Dideriksen, Knud; Andreassen, Jens-Petter; Zuckermann, Ronald N.; Sand, Karina K. (2024-01-01) Mineral-polymer composites found in nature exhibit exceptional structural properties essential to their function, and transferring these attributes to the synthetic design of functional materials holds promise across vario...
"Characterization of Minerals, Metals, and Materials 2023" Zhang, Mingming; Peng, Zhiwei; Li, Bowen; Hwang, Jiann-Yang; Monteiro, Sergio Neves; Soman, Rajiv; Kalay, Yunus Eren; Escobedo-Diaz, Juan P.; Carpenter, John S.; Brown, Andrew D.; Ikhmayies, Shadia; Hatton, Gareth (2024-01-01)
Size and morphology controlled polyol synthesis of LiFePO4 nanoparticles with addition of organic acid combinations Coşkun, Elif; Kurşun, Ekin; Yıldız, Bayram; Aşkar, Yasemin; Bahtiyar, Doruk; Aydınol, Mehmet Kadri; MAVİŞ, BORA; Çınar, Simge (2024-01-01) A mutual extension of an increasing demand for LiFePO4 (LFP) is the need to develop a synthesis technique that enables improved particle morphology and size control at different scales. In this study, the polyol method was...
The Effect of B-site Doping on NdBaCoaFe2-aO6 (a= 1.8, 1.6, 1.4, 1.2) for Enhanced OER/ORR Activity and Rechargeable Zinc- Air Battery Performance Özgür, Çağla; Toparlı, Çiğdem (2023-12-30)

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