Browsing Metalurji ve Malzeme Mühendisliği Bölümü Koleksiyonu by Issue Date
Now showing items 1-20 of 79
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A study of compaction of metal powders
(1996)This paper is a summary of an investigation of the compaction of metal powders. Two types of irregular atomized iron powders, a spherical copper powder and a bronze powder were uniaxially compacted in a floating-action die ... -
Metal ve seramik tozlarının bilgisayar kontrollü tek eksenli kalıpta preslenmesi
(1999)This study is about the investigation of the mechanical properties of metal and ceramic powders pressed by a uniaxial die. The bronze powders have spherical particles, copper powders are of oval, iron powders are of porous ... -
Synthesis of Si3N4 using sepiolite and various sources of carbon
(Kluwer Academic Publ, 2001)Sepiolite of Turkish origin was used as Si precursor in the syntheses of silicon nitride (Si3N4) powders by carbothermal reduction-nitridation (CRN) by mixing with several reducing agents i.e. charcoal, carbon black and ... -
Sepiolite-PAN intercalation used as Si3N4 forming precursor
(Kluwer Academic Publ, 2001)Silicon nitride (Si3N4) formation was investigated using sepiolite and polyacrylonitrile as silicon and carbon source, respectively. It was found that purified sepiolite could readily adsorb a sufficient amount of acrylonitrile ... -
Computer-assisted teaching and assessment of disabled students in higher education: the interface between academic standards and disability rights
(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' ... -
The influence of nitridation time on the structural properties of GaN grown on Si (111) substrate
(Springer Heidelberg, 2009)In the present paper, the effect of in-situ substrate nitridation time on crystalline quality of GaN films grown on Si (111) substrates by metal organic chemical vapor deposition (MOCVD) were investigated. A thin buffer ... -
Development of rolling technology for twin roll casted 1500MM wide magnesium AZ31 alloy
(Minerals, Metals & Materials Soc, 2009)Magnesium alloy AZ31 sheets of 4.5-6.5mm thick and 1500mm width were produced by twin roll strip casting first time in Turkey. Afterwards, sheets were hot and cold rolled down to less than 1mm both by laboratory and ... -
Corrosion of magnesium alloy AZ31 screws is dependent on the implantation site
(Elsevier Science Bv, 2011)The corrosion of biodegradable materials is a crucial issue in implant development. Among other materials, magnesium and magnesium based alloys are one of the most promising candidates. Since the corrosion of biodegradable ... -
Mechanical characterization of highly porous beta-Si3N4 ceramics fabricated via partial sintering & starch addition
(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- ... -
Fundamentals of magnesium alloy metallurgy: A volume in Woodhead Publishing Series in Metals and Surface Engineering
(Elsevier Inc., 2013)Magnesium and magnesium alloys offer a wealth of valuable properties, making them of great interest for use across a wide range of fields. This has led to extensive research focused on understanding the properties of ... -
Large magnetocaloric effects in magnetic intermetallics: First-principles and Monte Carlo studies
(E D P Sciences, 2015)We have performed ab initio electronic structure calculations and Monte Carlo simulations of frustrated ferroic materials where complex magnetic configurations and chemical disorder lead to rich phase diagrams. With lowering ... -
Characteristics of 5M modulated martensite in Ni-Mn-Ga magnetic shape memory alloys
(Amer Inst Physics, 2015)The applicability of the magnetic shape memory effect in Ni-Mn-based martensitic Heusler alloys is closely related to the nature of the crystallographically modulated martensite phase in these materials. We study the ... -
Magnetic proximity effect and shell-ferromagnetism in metastable Ni50Mn45Ga5
(Amer Inst Physics, 2016)The present study on magnetic and structural properties of Ni(50)Mn(45)G(a)5 confirms that structural metastability is an inherent property of Ni50Mn50-xXx Heusler alloys with X as In, Ga, and Sn. The ternary alloy transforms ... -
Ab initio Prediction of Martensitic and Intermartensitic Phase Boundaries in Ni-Mn-Ga
(Amer Physical Soc, 2016)Despite the importance of martensitic transformations of Ni-Mn-Ga Heusler alloys for their magneto-caloric and shape-memory properties, the martensitic part of their phase diagrams is not well determined. Using an ab initio ... -
Shell-ferromagnetism of nano-Heuslers generated by segregation under magnetic field
(Nature Publishing Group, 2016)We report on a new functional property in an AF martensitic Heusler Ni50Mn45In5, which when annealed at high temperatures under a magnetic field, segregates and forms Ni50Mn25In25 Heusler precipitates embedded in a Ni50Mn50 ... -
Exchange bias caused by field-induced spin reconfiguration in Ni-Mn-Sn
(Amer Physical Soc, 2016)Exchange bias is observed in ferromagnetic/antiferromagnetic (FM/AF) layered stacks and in materials with neighboring ferromagnetic and antiferromagnetic granules. The latter is commonly observed in Ni-Mn-based martensitic ... -
Investigation of temperature dependent magnetization and elastic modulus in Si-doped Fe65Ni35 invar alloys
(Elsevier Science Sa, 2017)Fe-65 Ni-35 invar is a prominent nickel steel alloy exhibiting low coefficient of thermal expansion around room temperature. The present work deals with the temperature dependence of the elastic modulus and magnetization ... -
Synthesis of c-axis oriented AlN thin films at room temperature
(Taylor & Francis Ltd, 2017)In this study, aluminium nitride (AlN) thin films were synthesised by plasma-enhanced reactive DC magnetron sputtering on glass and Si (100) substrates and the effect of bias voltages on the structural, optical and ... -
The rheological behavior of a fast-setting calcium phosphate bone cement and its dependence on deformation conditions
(Elsevier Science Bv, 2017)Calcium phosphate cements are osteoconductive biomaterials that are widely used for bone repair and regeneration applications, including spinal fusion, vertebroplasty, khyphoplasty, cranioplasty and periodontal surgeries. ... -
Room-temperature five-tesla coercivity of a rare-earth-free shell-ferromagnet
(American Institute of Physics Inc., 2017)Ni2MnX-based Heusler (X: main group element), when enriched with Mn, will decompose into ferromagnetic Ni2MnX and antiferromagnetic NiMn when temper-annealed around 650 K. When the starting material is chosen such that the ...
