Yazar "MÜ, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü" için Metalurji ve Malzeme Mühendisliği Bölümü Koleksiyonu listeleme
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3d transition-metal high-entropy Invar alloy developed by adjusting the valence-electron concentration
Rao, Ziyuan; Çakır, Aslı; Özgün, Özge; Ponge, Dirk; Raabe, D.; Li, Zhiming; Acet, Mehmet (American Physical Society, 2021)By considering the valence-electron concentration of 3d transition-metal alloys and compounds, we develop 3d high-entropy alloy Mn12.1Fe34.2Co33.5Ni12.3Cu7.9 with 8.7 electrons per atom, which is identical to that of ... -
Artificial neural network investigation of injectability and percolation of highly filled β -Tricalcium phosphate suspensions
Kulakoğlu, Serdar; Yalamaç, Emre; Şahin, Erdem (Elsevier Ltd, 2022)Over the past few decades, calcium phosphate cement has been used successfully for bone reconstruction applications. As percutaneous surgical methods have developed, there is an increased interest in calcium phosphate ... -
Characterization of 1–3 piezocomposites from PNN-PZT piezoceramics
Yalçın, Ezgi; Gözüaçık, Namık Kemal; Alkoy, Sedat; Sarı, Hüseyin Alptekin; Kaya, Mustafa Yunus; Öncel, Çınar; Menşur, Ebru (Elsevier B.V., 2023)Piezocomposite materials combine best properties of components while minimizing their disadvantages to provide desired properties. This study reports on piezocomposites with 1–3 connectivity prepared from 0.5Pb(Ni1/3Nb2/ ... -
Compositional, microstructural and mechanical effects of NaCl porogens in brushite cement scaffolds
Şahin, Erdem; Çiftçioğlu, Muhsin (Elsevier, 2021)Modification of the setting process of brushite cements by varying the concentration of ions that alter calcium phosphate crystallization kinetics, is known to enable control on the monetite conversion extent and the ... -
Computer-assisted teaching and assessment of disabled students in higher education: the interface between academic standards and disability rights
Konur, Özcan (Blackwell Publishing, 2007)Computer-assisted teaching and assessment has become a regular feature across many areas of the curriculum in higher education courses around the world in recent years. This development has resulted in the 'digital divide' ... -
DEVELOPMENT OF HYDROGEN PURIFICATION MEMBRANE BASED ON Pd-Mn-Ag TERNARY SYSTEM
Köse, Mehmet Mert; Pişkin, Fatih; Öztürk, Tayfur (International Association for Hydrogen Energy, IAHE, 2022)In this paper, we investigate Pd-Mn-Ag ternary system for potential alloys as separation membranes. For this purpose, thin film membranes of varying compositions were produced via magnetron sputtering. These were evaluated ... -
A dual-doping strategy of LaCoO3 for optimized oxygen evolution reaction toward zinc-air batteries application
Hilal, Mohamed Elhousseini; Şanlı, Seyfettin Berk; Dekyvere, Sander; Çakmak, Gülhan; Younus, Hussein A.; Pişkin, Fatih; Pişkin, Berke; Verpoort, Francis (WILEY, 2022)Perovskite-based electrocatalysts are extensively investigated as a replacement for noble metals electrocatalysts for energy storage and conversion devices. Their interesting catalytic activity, low cost, and diversity are ... -
Effect of B-site Al substitution on hydrogen production of La0.4Sr0.6Mn1-xAlx (x=0.4, 0.5 and 0.6) perovskite oxides
Şanlı, Seyfettin Berk; Pişkin, Berke (Elsevier Ltd, 2021)Thermochemical water splitting using perovskite oxides as redox materials is one of the important way to use solar energy to produce green hydrogen. Thus, it is hence important to discover new materials that can be used ... -
Effect of different hydrogen Fugacities on the microstructure of additively manufactured Ti-6Al-4V
Kaya, Ali Arslan; Metalnikov, Polina; Ben-Hamu, Guy; Eliezer, Dan (Elsevier Inc., 2023)In this study we compared the microstructural changes in the presence of hydrogen of Ti-6Al-4V alloy prepared by two different additive manufacturing (AM) methods: electron beam melting (EBM) and selective laser melting ... -
Emergence of net magnetization by magnetic field biased diffusion in antiferromagnetic L10 NiMn
Çakır, Aslı; Josten, Nicolas; Noorzayee, Sakia; Miroshkina, Olga; Zingsem, Benjami (AMER PHYSICAL SOC, 2023)NiMn is a collinear antiferromagnet with high magnetocrystalline anisotropy (K = -9.7 x 105 J m-3). Through magnetic annealing of NiMn with excess Ni, strongly pinned magnetic moments emerge due to an imbalance in the ... -
Enhanced injectability of aqueous β-tricalcium phosphate suspensions through PAA incorporation, gelling and preshearing
Şahin, Erdem (Elsevier Ltd, 2023)The major shortcoming of aqueous calcium phosphate suspensions used in biomedical applications is their unstable flow during delivery by mechanical means. In this study, microstructural changes and the resulting flow ... -
Fabrication of BaZr0.80Y0.20O3-delta Sputtering Target for Thin-Film Proton Conducting Oxides
Pişkin, Fatih (MAIK NAUKA/INTERPERIODICA/SPRINGER, 2022)A systematic work was carried out to fabricate a phase-pure sputter target for thin film deposition of BaZr0.80Y0.20O3 - delta. The current study mainly involves two parts; i.e. determination of the ideal parameters for ... -
Formation of precipitates in off-stoichiometric Ni-Mn-Sn Heusler alloys probed through the induced Sn-moment
Eggert, Benedikt; Çakır, Aslı; Günzing, Damian; Josten, Nicolas; Scheibel, Franziska; Acet, Mehmet (Royal Society of Chemistry, 2023)The shell-ferromagnetic effect originates from the segregation process in off-stoichiometric Ni-Mn-based Heusler alloys. In this work, we investigate the precipitation process of L21-ordered Ni2MnSn and L10-ordered NiMn ... -
Influence of two-step austempering at different temperatures on mechanical and microstructural properties of AISI 9254 high silicon steel
Nalcacı, Burak; Baysun, Meltem; Bahador, Abdollah; Umeda, Junko; Münstermann, Sebastian; Kaya, Ali Arslan; Erdoğan, Mehmet (Taylor and Francis Ltd., 2023)This study was undertaken to understand the effects of two-step austempering treatment on an AISI 9254 high silicon steel towards tailoring the properties as desired while simultaneously employing the benefits of high and ... -
Investigation into Ca-Doped LaMnCoO3 Perovskite Oxides for Thermochemical Water Splitting
Yiğiter, İhsan Emre; Pişkin, Berke (Springer, 2022)Two-step thermochemical water splitting (II-TWS), involving concentrating sunlight, has become prominent for green hydrogen production that does not require H2/O2 separation steps at high temperatures. The kinetics and ... -
Investigations of the Friction and Wear Resistance of the Natural Fiber-Reinforced Polyamide Composites
Doğru, Alperen; Can Kaymaz, İbrahim; Kandemir, Miray Batikan; Seydibeyoğlu, Mehmet Özgür (wiley, 2023)The search for natural and biobased materials to create a sustainable future has led many scientists to conduct research on natural-fiber-reinforced composites. Natural fibers have been used for thousands of years, but in ... -
Magnetic properties of fcc and ? phases in equiatomic and off-equiatomic high-entropy Cantor alloys
Özgün, Özge; Koch, David; Çakır, Aslı (AMER PHYSICAL SOC, 2023)The equiatomic face-centered-cubic (fcc) high-entropy alloy CrMnFeCoNi has a valence electron concentra-tion of 8 electrons per atom, equivalent to that of Fe. Its ground-state properties are similar to that of fcc-Fe and ... -
Magnetic properties of the FCC and BCC phases of (MnFeCoNi)(80)Cu(20_x)Z(x()Z(1)& nbsp;Al, Ga) high-entropy alloys
Orbay, Yaşar; Rao, Ziyuan; Çakır, Aslı; Tavşanoğlu, Tolga; Farle, Michael; Acet, Mehmet (PERGAMON-ELSEVIER SCIENCE LTD, 2023)In this work, the FCC-BCC phase transition in (MnFeCoNi)80Cu20 (Al, Ga) high entropy alloys were investigated on the basis of structural, magnetic, hardness and thermal expansion properties. It is found that the equiatomic ... -
Mechanical and microstructural evaluation of solid-state foamed Ti6Al4V-ELI alloy
Guglielmi P.; Piccininni A; Cusanno A.; Kaya, Ali Arslan (Elsevier B.V., 2022)Metallic materials adopted in biomedical applications play a key role in the replacement of so-called "hard tissues" (the human bone). Titanium (Ti) alloy prostheses are considered the best among all metallic implants due ... -
Mechanical characterization of highly porous beta-Si3N4 ceramics fabricated via partial sintering & starch addition
Kalemtaş Ayşe; Topateş, Gülsüm; Özçoban, Hüseyin; Mandal, Hasan; Kara, Ferhat; Janssen, Rolf (Elsevier Sci Ltd, 2013)In this study, porous beta-Si3N4 ceramics containing limited amount of Sm2O3 and CaO as sintering aids were produced by addition of potato starch (10 and 20 vol.%) and partial sintering. Two different Si3N4 powders, alpha- ...