Nitrieren von Eisen mit Ammoniak: Wachstum und Mikrostruktur der Nitride und Porenbildung in ζ-Fe2N

Middendorf, C.; Mader, W.

doi:10.1002/1521-3749(200103)627:3<398::aid-zaac398>3.0.co;2-b

Cited by 6 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gressmann et al [32]). High-resolution cross-sectional TEM studies at the location of the "/ 0 interface confirm that no specific orientation relationship, as reported elsewhere [28,[41][42][43][44][45], occurs between " and 0 . TEM also showed that neither in the " layer (figure 6) nor in the 0 layer at/near the interface stacking faults are present; stacking faults could lead to special line-shift and line-broadening effects in the powder-diffraction patterns.…”

Section: Microstructure Of the E Layers As Determined By Optical Micmentioning

confidence: 91%

“…TEM on cross-sections at the "/ 0 interface region was carried out using a JEOL JEM-4000FX (400 kV) transmission electron microscope. The preparation procedure of the TEM foils is described in the literature [27,28]. For EBSD measurements, performed on cross-sections, the specimens were embedded, ground and polished (last step: colloidal silica suspension OPS, Struers GmbH, for several hours).…”

Section: Tem and Ebsdmentioning

confidence: 99%

“…The 0 phase is not oriented along a low-index zone axis (in the image only (111) planes are visible). Evidently, the orientation relationship mentioned in the literature [28,[41][42][43][44][45] is not observed.…”

Section: Microstructure Of the E Layers As Determined By Optical Micmentioning

confidence: 99%

See 2 more Smart Citations

X-ray diffraction line-profile analysis of hexagonalϵ-iron nitride compound layers: composition–and stress–depth profiles

Gressmann

Leineweber

Mittemeijer

2008

Philosophical Magazine

View full text Add to dashboard Cite

Two hexagonal "-Fe 3 N 1þx layers grown on -Fe substrates by nitriding in NH 3 / H 2 gas atmospheres were investigated by high-resolution X-ray powder diffraction using synchrotron radiation employing systematic tilting of the diffraction vector with respect to the specimen surface. Considering all recorded reflections simultaneously, the complicated diffraction profiles obtained were analyzed using a model incorporating hkl-dependent (anisotropic) and tilt angle ( )-dependent diffraction-line broadening and diffraction-line shifting. The diffraction-line broadening is mainly ascribed to the nitrogen concentrationdepth profile within the layers causing depth-dependent strain-free lattice parameters, whereas the line shifts are predominantly caused by the stressdepth profile originating from the concentration-dependence of the coefficients of thermal expansion of the " phase, with stress parallel to the surface, which is of tensile nature at the surface and of compressive nature at the "/ 0 interface. This stress gradient additionally leads to a dependence of the line broadening. Fitting of the microstructure and diffraction model led to determination of microstructure parameters, which can be related to the different sets of treatment conditions applied for the "-iron nitride layer growth.

show abstract

Section: Microstructure Of the E Layers As Determined By Optical Micmentioning

confidence: 91%

Section: Tem and Ebsdmentioning

confidence: 99%

See 1 more Smart Citation

X-ray diffraction line-profile analysis of hexagonalϵ-iron nitride compound layers: composition–and stress–depth profiles

Gressmann

Leineweber

Mittemeijer

2008

Philosophical Magazine

View full text Add to dashboard Cite

show abstract

“…As an example, the calculated lattice parameters of ζ -Fe 2 N are a = 4.3406Å, b = 5.4480Å, c = 4.7544Å, which are very close to the values (a = 4.437Å, b = 5.541Å, c = 4.843Å) found by Rechnbach and Jacobs using neutron and high-resolution synchrotron diffraction at room temperature, 14 and to the values (a = 4.425Å, b = 5.523Å, c = 4.830Å) obtained by Jack. [10][11][12] 2 X phases using the DFT-GGA method.…”

Section: A Structures and Chemical Bonds In Fe 2 X Phasesmentioning

confidence: 99%

“…2,7,8 Finally, knowledge about the role of carbon and nitrogen in Fe 2 X carbides and nitrides is very useful to understand chemical reactions, such as nitridation and carburization of iron-related materials and the related effects on surface hardening and cracking mechanisms in steels. [1][2][3][4][5] There have been many efforts by both experimentalists and theoreticians to understand the structural relationships 2,4,[8][9][10][11][12][13][14][15] and the electronic and magnetic properties of Fe 2 X carbides and nitrides as well as the differences between them. 2,8,[16][17][18][19][20][21][22][23][24] Using x-ray diffraction (XRD), Jack investigated the crystal structures of the hexagonal ε-Fe 3 X 1+x phases and their structural relationships with ζ -Fe 2 N and η-Fe 2 C. [10][11][12] Schwarz and coworkers performed high-pressure-high-temperature (HT-HP) experiments, revealing that orthorhombic ζ -Fe 2 N transforms into the hexagonal ε-Fe 3 X 1+x form at HT-HP conditions.…”

Section: Introductionmentioning

confidence: 99%

Role of carbon and nitrogen in Fe2C and Fe2N from first-principles calculations

et al. 2011

View full text Add to dashboard Cite

Although Fe 2 C and Fe 2 N are technologically important materials, the exact nature of the chemical bonding of C and N atoms and the related impact on the electronic properties are at present unclear. Here, results of first-principles electronic structure calculations for Fe 2 X (X = C, N) phases are presented. The electronic structure calculations show that the roles of N and C in iron nitrides and carbides are comparable, and that the X-X interactions have significant impact on electronic properties. Accurate analysis of the spatially resolved differences in electron densities reveals a subtle distinction between the chemical bonding and charge transfer of N and C ions.

show abstract

Iron Carbides and Nitrides: Ancient Materials with Novel Prospects

Zhang

Lei

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

Iron carbides and nitrides have aroused great interest in researchers, due to their excellent magnetic properties, good machinability and the particular catalytic activity. Based on these advantages, iron carbides and nitrides can be applied in various areas such as magnetic materials, biomedical, photo- and electrocatalysis. In contrast to their simple elemental composition, the synthesis of iron carbides and nitrides still has great challenges, particularly at the nanoscale, but it is usually beneficial to improve performance in corresponding applications. In this review, we introduce the investigations about iron carbides and nitrides, concerning their structure, synthesis strategy and various applications from magnetism to the catalysis. Furthermore, the future prospects are also discussed briefly.

show abstract

Nitrieren von Eisen mit Ammoniak: Wachstum und Mikrostruktur der Nitride und Porenbildung in ζ-Fe2N

Cited by 6 publications

References 7 publications

X-ray diffraction line-profile analysis of hexagonalϵ-iron nitride compound layers: composition–and stress–depth profiles

X-ray diffraction line-profile analysis of hexagonalϵ-iron nitride compound layers: composition–and stress–depth profiles

Role of carbon and nitrogen in Fe2C and Fe2N from first-principles calculations

Iron Carbides and Nitrides: Ancient Materials with Novel Prospects

Contact Info

Product

Resources

About