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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ståhl, Kenny
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2017The ternary Fe-C-N system: Homogeneous distributions of nitrogen and carboncitations
- 2017The ternary Fe-C-N system: Homogeneous distributions of nitrogen and carboncitations
- 2017On the elusive crystal structure of expanded austenitecitations
- 2017Effect of carbon on interstitial ordering and magnetic properties of ε-Fe2(N,C)1-zcitations
- 2017Effect of carbon on interstitial ordering and magnetic properties of ε-Fe2(N,C) 1-zcitations
- 2016Composition-dependent variation of magnetic properties and interstitial ordering in homogeneous expanded austenitecitations
- 2016Composition-dependent variation of magnetic properties and interstitial ordering in homogeneous expanded austenitecitations
- 2016On the Carbon Solubility in Expanded Austenite and Formation of Hägg Carbide in AISI 316 Stainless Steelcitations
- 2016On the Carbon Solubility in Expanded Austenite and Formation of Hägg Carbide in AISI 316 Stainless Steelcitations
- 2014Thermal expansion and phase transformations of nitrogen-expanded austenite studied with in situ synchrotron X-ray diffractioncitations
- 2014Thermal expansion and phase transformations of nitrogen-expanded austenite studied with in situ synchrotron X-ray diffractioncitations
- 2012Extended x-ray absorption fine structure investigation of annealed carbon expanded austenitecitations
- 2012Extended x-ray absorption fine structure investigation of annealed carbon expanded austenitecitations
- 2011Extended X-Ray Absorption Fine Structure Investigation of Carbon Stabilized Expanded Austenite and Carbides in Stainless Steel AISI 316citations
- 2011Extended X-Ray Absorption Fine Structure Investigation of Carbon Stabilized Expanded Austenite and Carbides in Stainless Steel AISI 316citations
- 2010Extended X-ray absorption fine structure investigation of nitrogen stabilized expanded austenitecitations
- 2010Extended X-ray absorption fine structure investigation of nitrogen stabilized expanded austenitecitations
- 2008Modelling the X-ray powder diffraction of nitrogen-expanded austenite using the Debye formulacitations
- 2008Modelling the X-ray powder diffraction of nitrogen-expanded austenite using the Debye formulacitations
- 2008EXAFS investigation of low temperature nitrided stainless steelcitations
- 2008EXAFS investigation of low temperature nitrided stainless steelcitations
- 2007Nanoscale structural characterization of Mg(NH 3 ) 6 Cl 2 during NH 3 desorption:An in situ small angle X-ray scattering studycitations
- 2007Crystal structure and phase transitions in perovskite-like C(NH<inf>2</inf>)<inf>3</inf>SnCl<inf>3</inf>citations
- 2007Devitrification and high temperature properties of mineral woolcitations
- 2007Nanoscale structural characterization of Mg(NH3)6Cl2 during NH3 desorptioncitations
- 2006Activation of a Cu/ZnO catalyst for methanol synthesiscitations
- 2006Synthesis and characterization of strontium carboxylates at room temperature and at high temperature in autoclave vesselscitations
- 2005On the determination of crystallinity and cellulose content in plant fibrescitations
- 2003Re4As6S3, a thio-spinel-related cluster system
- 2003Origin of nondetectable x-ray diffraction peaks in nanocomposite CuTiZr alloyscitations
- 2001Hardness and thermal stability of cubic silicon nitride
- 2000Pressure-induced decoupling of the order-disorder and displacive contributions to the phase transition in diguanidinium tetrachlorostannatecitations
- 2000Formation of quasicrystals in Zr46.8Ti8.2Cu7.5Ni10Be27.5 bulk glasscitations
Places of action
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article
The ternary Fe-C-N system: Homogeneous distributions of nitrogen and carbon
Abstract
Porous iron foils were used for synthesizing homogeneous samples of iron carbides and (carbo)nitrides. Homogeneous distributions of interstitial nitrogen and carbon were obtained without long treatment times due to limited required diffusion distances in the porous material. By adjustments of the nitriding and carburizing potentials, tailored nitrogen and carbon contents can be achieved, which allows assessment of a phase stability diagram for the Fe-N-C system, for which available experimental data is limited. Thermal decomposition sequences were established for the various iron carbides and (carbo)nitrides using <i>in situ </i>synchrotron X-ray diffraction. Hägg carbide (χ) and ε-carbonitride, Fe<sub>2</sub>(N,C)<sub>1-z</sub>, with high carbon content decompose to cementite (θ) above 850 K, while ferrite (α) forms above 950 K and austenite (γ) above 1025 K. For high nitrogen contents ζ- Fe<sub>2</sub>(N,C) is transformed to ε from 680 to 770 K, which decomposes to γ′-Fe<sub>4</sub>(N,C)<sub>1+x </sub>between 795 and 900 K as nitrogen is released as N<sub>2</sub>. Ferrite forms above 850 K while austenite may be briefly formed around 900 K.The two iron carbides, cementite and Hägg carbide, exhibit different coefficients of thermal expansion. Below approximately 480 K, cementite is ferromagnetic and a volumetric thermal expansion coefficient of αV = 1.5 × 10<sup>−5</sup> K<sup>−1</sup> is obtained. The average value in the paramagnetic state is αV = 4.3 (3) × 10<sup>−5 </sup>K<sup>−1</sup>. For Hägg carbide the average value is αV = 3.8 (5) × 10<sup>−5</sup> K<sup>−1</sup> and only a minor change in unit cell volume is observed at the magnetic transition temperature.