Tungstenin elektrokimyasal metotlarla doğrudan üretimi

Liquid phase sintering of tungsten-nickel-cobalt heavy alloys Dinçer, Onur; Kalkanlı, Ali; Karakaya, İshak; Department of Metallurgical and Materials Engineering (2014) The aim of this thesis study was to investigate the effects of composition and sintering variables on the microstructural characteristics of W-rich W-Ni-Co heavy alloys. W-Ni-Co alloys containing 90 to 97 wt% W and different Ni/Co ratios were investigated in the study. The alloys studied were produced by applying conventional powder metallurgy methods and subjected to microstructural and mechanical characterization by using suitable techniques. All of the alloys investigated reached almost full density when...
Recovery of tungsten from tungsten bearing compounds Erdoğan, Metehan; Karakaya, İshak; Department of Metallurgical and Materials Engineering (2013) Extensive research in recent years has failed to develop any essentially new method of large scale tungsten production. A new tungsten powder production technique from calcium tungstate (CaWO4) has recently been reported. In this thesis, this technique was further explored from the aspects of electrochemical reduction mechanism and kinetics, applicability to scheelite concentrates and industrial production. Cyclic voltammetry, constant potential and constant current electrochemical reduction tests were perf...
Simultaneous determination of bismuth and tellurium using tungsten coil atom trap with inductively coupled plasma mass spectrometry / Bora, Selin; Ataman, Osman Yavuz; Department of Chemistry (2016) Atom traps such as slotted quartz tube, quartz plate and tungsten coil have been used in atomic spectrometry in order to preconcentrate analyte hydrides and then detection was done by atomic absorption or fluorescence spectrometry. In this study, tungsten coil atom trap was used for the first time with plasma spectrometry. A novel method, which is called Hydride Generation Tungsten Trap Inductively Coupled Plasma Mass Spectrometry (HG-W-Trap-ICPMS), was developed in the first part of this study. Then as a s...
Tungstofosforik Asit Yüklü Mezogözenekli Alümina Katalizörlerin DME Üretimi İçin Sentezlenmesi Şener, M İlker; Sezgi, Naime Aslı; Doğu, Timur; Doğu, Gülşen; Oktar, Nuray (null; 2016-08-23)
Fuzzy approach in preliminary design of weak rock slopes for lignite mines Yardımcı, Ahmet Güneş; Karpuz, Celal; Department of Mining Engineering (2013) Slope mass rating (SMR) system, which is an enhanced version of rock mass rating (RMR), is a useful tool to be utilized for the preliminary stability analysis of rock slopes. Parameter scoring systems of both conventional RMR and SMR systems are based on crisp set theory. Common problems of conventional classification systems are assigning sharp boundaries for ranges, the same values for both upper and lower limits of ranges and presence of uncertainties as a result of complex nature of rock. These problems...

Citation Formats

İ. Karakaya, T. Öztürk, M. K. Aydınol, and M. Erdoğan, “Tungstenin elektrokimyasal metotlarla doğrudan üretimi,” 2008. Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/95765.