Subsolidus phase relations in the La2O3–Fe2O3–Al2O3 system

2001 ◽  
Vol 16 (3) ◽  
pp. 822-827
Author(s):  
Danjela Kuščer ◽  
Slavko Bernik ◽  
Marko Hrovat ◽  
Janez Holc
Keyword(s):  
Electron Microscopy ◽  
Phase Diagram ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Solid Oxide ◽  
Phase Relations ◽  
Oxide Fuel ◽  
Subsolidus Phase ◽  
X Ray ◽  
Scanning Electron

The subsolidus phase relations in the La–Fe–Al–O system were investigated for solid oxide fuel cell (SOFC) applications. Five compounds, LaAlO3, LaAl11O18, LaFe12O19, AlFeO3, and LaFeO3, coexist in the La–Fe–Al–O system at 1380 °C in air. The microstructure and composition of the samples were studied by x-ray diffractometry and scanning electron microscopy. Based on experimental evidence, a phase diagram of the La2O3–Al2O3–Fe2O3 system has been proposed.

scholarly journals PENGARUH SUHU SINTERING TERHADAP KEKERASAN PADUAN MIKRO Fe-Cr HASIL METODE ULTRASONIK

2018 ◽  
Vol 3 (2) ◽  
pp. 89-97
Author(s):  
Kusdi Prijono ◽  
Amin Suhadi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Ultrasonic Method ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alloy Particles ◽  
Scanning Electron

AbstrakFe-Cr      merupakan  paduan yang memiliki ketahanan pada suhu tinggi dan kemampuan yang dapat digunakan sebagai interkonek pada sel bakar Solid Oxide Fuel Cell (SOFC). Pada penelitian ini telah dilakukan sintesis bongkah paduan Fe-Cr dengan menggunakan serbuk paduan mikro Fe-Cr hasil sintesis dengan metode ultrasonik. Metode ultrasonik dimanfaatkan untuk sintesis paduan mikro Fe-Cr melalui penggunaan gelombang suara ultrasonik. Langkah yang dilakukan adalah memadatkan partikel paduan mikro Fe-Cr dengan  kompaksi tanpa lubrikan, hasil kompaksi dimasukan kedalam kapsul kaca kuarsa selanjutnya dilakukan  proses variasi sintering 11000C, 12000C dan 13000C pada kondisi suhu maximal ditahan selama 1 jam , lalu didinginkan secara normal dalam tungku. Karakterisasi strukturmikro dilakukan dengan Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (SEM-EDS), X-Ray Diffraction (XRD) disertai analisis dengan metode MAUD (Material Analisys Using Diffraction ) dan pengukuran Nilai kekerasan sesungguhnya. Partikel paduan mikro Fe-Cr lebih stabil dan konsisten dalam pembentukan fasa bongkah paduan Fe-Cr melalui variasi sintering. Diperoleh bongkah paduan Fe-Cr homogen tanpa oksida.Kata kunci: Paduan mikro Fe-Cr, Ultrasonik, Kapsul Kuarsa, Sintering AbstractFe-Cr is an alloy that has a high temperature resistance and is potential to be used as an interconnect on Solid Oxide Fuel Cell (SOFC) fuel cells. In this research, Fe-Cr alloys have been synthesized using Super Fe-Cr micro alloy powder with ultrasonic method. The ultrasonic method is utilized for the synthesis of Fe-Cr micro alloys through the use of ultrasonic sound waves. The steps taken were the consolidation of the Fe-Cr micro alloy particles through compaction without lubricant, then in a quartz glass capsule a sintering process variation of 11000C, 12000C and 13000C at maximum temperature conditions retained for 1 hour, then cooled normally in the furnace. Characterization of microstructure was performed by Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (SEM-EDS), X-Ray Diffraction (XRD) with analysis by MAUD method (Material Analisys Using Diffraction) and actual density measurement. The Fe-Cr micro alloy particles are more stable and consistent in the formation of the Fe-Cr alloy phase via sintering variations. The alloys of Fe-Cr are homogenous without oxide.Keyword : Micro-alloy Fe-Cr, Ultrasonic, Capsule Quartz, Sintering

scholarly journals PENGARUH PADUAN MIKRO Fe Cr DENGAN METODE ULTRASONIK PADA PEMBENTUKAN BONGKAH Fr Cr MELALUI VARIASI SUHU SINTERING

2019 ◽  
Vol 9 (1) ◽  
pp. 1-7
Author(s):  
Kusdi Prijono ◽  
Amin Suhadi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Fe-Cr merupakan paduan yang memiliki ketahanan pada suhu tinggi dan kemampuan yang dapat digunakansebagai interkonek pada sel bakar Solid Oxide Fuel Cell (SOFC). Pada penelitian ini telah dilakukan sintesisbongkah paduan Fe-Cr dengan menggunakan serbuk paduan mikro Fe-Cr hasil sintesis dengan metode ultrasonik.Metode ultrasonik dimanfaatkan untuk sintesis paduan mikro Fe-Cr melalui penggunaan gelombang suaraultrasonik. Langkah yang dilakukan adalah memadatkan partikel paduan mikro Fe-Cr dengan kompaksi tanpalubrikan, hasil kompaksi dimasukan kedalam kapsul kaca kuarsa selanjutnya dilakukan proses variasi sintering11000C, 12000C dan 13000C pada kondisi suhu maximal ditahan selama 1 jam ,lalu didinginkan secara normaldalam tungku. Karakterisasi strukturmikro dilakukan dengan Scanning Electron Microscopy (SEM), EnergyDispersive X-Ray Spectroscopy (SEM-EDS), X-Ray Diffraction (XRD) disertai analisis dengan metode MAUD(Material Analisys Using Diffraction ) dan pengukuran Nilai kekerasan sesungguhnya. Partikel paduan mikro Fe-Crlebih stabil dan konsisten dalam pembentukan fasa bongkah paduan Fe-Cr melalui variasi sintering. Diperolehbongkah paduan Fe-Cr homogen tanpa oksida.

Growth of Copper Nanowires by Using Thermal Oxidation for Solid Oxide Fuel Cell

2017 ◽  
Vol 268 ◽  
pp. 234-238
Author(s):  
N.A.A. Rahman ◽  
Rosnita Muhammad ◽  
Zuhairi Ibrahim ◽  
Yussof Wahab
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Copper Nanowires ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Cu Foil ◽  
Scanning Electron

Tuning high density nanostructures by simple and economic method may contribute towards the development of solid oxide fuel cells. Copper oxide nanowires grown on Cu foil by thermal oxidation at relative low operating temperature from 400°C are characterized by using x-ray diffraction (XRD), energy dispersive x-ray spectroscopy (EDX), atomic force morphology (AFM), conductive-AFM (C-AFM), and field emission scanning electron microscopy (FESEM). The role of oxidizing temperature and time on structural and electrical properties are studied. The formation of nanowires is confirmed by X-Ray diffraction pattern with the presence of copper oxide. The electrical conductivity of the nanowires was ranging from 0.2x105 S m-1 to 0.8x105 S m-1are determined from conductive atomic force microscopy. The oxidation time strongly influence the morphology and chemical composition of the nanowires. Field emission scanning electron microscopy reveals the growth mechanism of copper nanowires formation is based on vapour-solid (VS) mechanism. Herein, the successfully growth of CuO nanowire are directly from Cu foil to overcome the mismatching stress between the substrate and the oxide layer. Optimum parameters are studied to make better electrolyte performance in the applications of solid oxide fuel cell (SOFC).

scholarly journals Preparation and Phase Relations in the CuSbSe2 – CuInSe2 System

2016 ◽  
Vol 1735 ◽  
Author(s):  
Barys V. Korzun ◽  
Valery R. Sobol ◽  
Marin Rusu ◽  
Ruben M. Savizky ◽  
Alena A. Fadzeyeva ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Microscopy ◽  
Mole Fraction ◽  
Powder Diffraction ◽  
Room Temperature ◽  
Phase Relations ◽  
X Ray ◽  
Ternary Compounds ◽  
Scanning Electron

ABSTRACTThe CuInSe2 and CuSbSe2 ternary compounds and alloys of the (CuSbSe2)1-x·(CuInSe2)x system with the mole fraction of CuInSe2 (x) equal to 0.05, 0.15, 0.25, 0.375, 0.50, 0.625, 0.75, 0.85, and 0.95 were prepared and the phase relations in this system were investigated by X-ray powder diffraction, optical microscopy, and scanning electron microscopy. It was shown that the alloys of the CuSbSe2-CuInSe2 system are biphasic at room temperature in the whole range of compositions, and the limits of solubility for CuSbSe2 in CuInSe2 and for CuInSe2 in CuSbSe2 do not exceed 0.001 mole fraction.

An Al13Co4 phase in the Al–Cu–Co alloy system

1992 ◽  
Vol 7 (5) ◽  
pp. 1100-1103 ◽  
Author(s):  
B. Grushko ◽  
Ch. Freiburg
Keyword(s):  
Electron Microscopy ◽  
Phase Diagram ◽  
Scanning Electron Microscopy ◽  
Liquid Phase ◽  
Alloy System ◽  
Homogeneity Region ◽  
X Ray ◽  
Decagonal Phase ◽  
Scanning Electron

A part of the Al–Cu–Co phase diagram adjacent to the Al13Co4 composition was studied at 800 °C by scanning electron microscopy and x-ray diffractometry. The homogeneity region of the Al13Co4 phase was found to extend up to 6 at. % Cu. At 800 °C this phase is in equilibrium with Al(Co, Cu), Al5Co2, Al9Co2, the decagonal phase, and a liquid phase. The existence of the Y-phase and Al3Co was not confirmed at this temperature.

scholarly journals Investigation of solidification behavior of the Sn-rich ternary Sn–Bi–Zn alloys

10.30544/259 ◽  
2017 ◽  
Vol 23 (1) ◽  
pp. 11-20
Author(s):  
S Mladenović ◽  
D Manasijević ◽  
M Gorgievski ◽  
D Minić ◽  
Silvana Branislav Dimitrijević
Keyword(s):  
Electron Microscopy ◽  
Phase Diagram ◽  
Scanning Electron Microscopy ◽  
Calphad Method ◽  
Solidification Behavior ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Solidification Simulation ◽  
Zn Alloys ◽  
Scanning Electron

Solidification properties and microstructure of six as-cast Sn–Bi–Zn alloys with 80 at.% of Sn and variable contents of Bi and Zn were experimentally investigated using the scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS) and differential scanning calorimetry (DSC). The experimentally obtained results were compared with predicted phase equilibria according to the calculation of phase diagram (CALPHAD) method and by the Scheil solidification simulation. 

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