A study of low energy high dose nitrogen ion implantation in iron – Effect of ion energy and current density

Sanghera, H.K.; Sullivan, J.L.

doi:10.1016/s0168-583x(98)00958-6

Cited by 14 publications

(11 citation statements)

References 25 publications

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“…A variety of different nitride phases can be formed, depending upon the experimental conditions. A survey of the literature related to the synthesis of iron nitrides using ion energies (2−5 keV) comparable to those employed in the present investigation suggests that the dominant nitride phase is probably Fe 16 N 2 …”

Section: Methodsmentioning

confidence: 60%

“…Figure shows the evolution of the Fe(2p) and O(1s) XPS regions of a nitrided iron surface during exposure to oxygen at a substrate temperature of 125 K and following subsequent annealing. Before exposure to oxygen, the Fe(2p) region consisted of two peaks located at 706.8 and 719.9 eV corresponding to the Fe(2p 3/2 ) and Fe(2p 1/2 ) transitions of Fe/Fe x N y , respectively. , Upon oxidation, new peaks appeared in the Fe(2p) region centered at 710 and 723 eV indicative of iron oxide(hydroxide) production. , Prior to oxidation, the O(1s) XPS region exhibited no discernible spectral intensity. During exposure to oxygen, however, a broad peak appeared in the O(1s) region that was fitted to a combination of O 2- (≈530.0 eV), OH - (≈532.1 eV), and H 2 O (≈533.8 eV) species, the latter two a consequence of background water adsorption and decomposition. , With extended exposures ( t > 60 min), all of the O(1s) peaks increased in intensity, although the H 2 O peak became the dominant feature, indicating the buildup of a H 2 O overlayer.…”

Section: Resultsmentioning

confidence: 99%

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Low-Temperature Oxidation of Nitrided Iron Surfaces

et al. 2003

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The low-temperature (<150 K) oxidation of nitrided iron surfaces exposed to oxygen and water was probed using X-ray photoelectron spectroscopy (XPS), reflection absorption infrared spectroscopy (RAIRS), and mass spectrometry (MS). During exposure of nitrided iron surfaces to oxygen, iron oxynitride (Fe x N y O z ), nitrosonium ions (NO+), as well as nitrite/nitrito- and nitrate-type species were observed. The production of nitrite/nitrito and nitrate species is taken as evidence for the existence of oxygen insertion chemistry into the iron nitride lattice under these low-temperature oxidation conditions. No molecular nitrogen was produced during reactions with oxygen or water in contrast to oxidation studies on other transition metal nitrides. Upon annealing the oxidized overlayer, nitrogen desorbs exclusively as nitric oxide (NO) between 250 and 400 K. In contrast to oxygen, the reactivity of nitrided iron surfaces toward water was limited to the production of adsorbed N−O species.

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Section: Methodsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 99%

Low-Temperature Oxidation of Nitrided Iron Surfaces

et al. 2003

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“…In turn, Drako and Gumanskij [6] found the hexagonal ε-phase in the N and C modified layer. Sanghera and Salvani [7] proved that in the case of N implantation of iron in the low energy range (2-5 keV) nitrogen concentration increases and saturates. This feature depends only on the fluence and not on the current of the beam.…”

Section: Introductionmentioning

confidence: 99%

Positron Beam Studies of Radiation Damage Induced by Various Energy Heavy Ions of Xe²⁶⁺ in Iron

et al. 2019

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Experimental studies of pure iron exposed to Xe 26+ irradiation are reported. Implantations were made with the fluence of 5 × 10 13 ions/cm 2 using 167 MeV ions moderated to 122.5, 77.0, and 44.5 MeV. Investigations were performed with variable energy positron beam (VEP). Doppler broadening spectroscopy (DB) was applied. The analysis of obtained results gives information about the presence of various kind of open-volume defects. Two layers with different values of positron diffusion lengths were found in implanted samples. The deeper one was more defected.

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“…Implantation can cause changes in surface composition, morphology and chemical bond structure leading to the formation of new compounds and can also be an effective method to improve mechanical and chemical properties [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen ion implantation and characterization of tungsten oxide films

Tesfamichael

Bell

2005

SPIE Proceedings

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This paper implements modification of tungsten oxide film using ion implantation and a physical characterization of the film. The film was implanted with nitrogen at energies between 10 keV and 40 keV and ion dose range 10 14 -10 16 cm -2 .The surface morphology of the film after implantation has been modified as observed using electron microscopy. The transmittance of the film was found to decrease with increasing implantation energy and ion dose as measured using conventional spectrophotometer. Depth profile of nitrogen was analyzed using Secondary Ion Mass Spectroscopy (SIMS) and found a peak of nitrogen across the depth of the implanted layer. The amount of nitrogen was found to increase with increasing ion dose and energy. From electron diffraction a broader diffraction rings were revealed from both the implanted and un-implanted layers, indicating that the crystalline properties of the tungsten oxide film after ion implantation remains the same.

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A study of low energy high dose nitrogen ion implantation in iron – Effect of ion energy and current density

Cited by 14 publications

References 25 publications

Low-Temperature Oxidation of Nitrided Iron Surfaces

Low-Temperature Oxidation of Nitrided Iron Surfaces

Positron Beam Studies of Radiation Damage Induced by Various Energy Heavy Ions of Xe²⁶⁺ in Iron

Nitrogen ion implantation and characterization of tungsten oxide films

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A study of low energy high dose nitrogen ion implantation in iron – Effect of ion energy and current density

Cited by 14 publications

References 25 publications

Low-Temperature Oxidation of Nitrided Iron Surfaces

Low-Temperature Oxidation of Nitrided Iron Surfaces

Positron Beam Studies of Radiation Damage Induced by Various Energy Heavy Ions of Xe26+ in Iron

Nitrogen ion implantation and characterization of tungsten oxide films

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Positron Beam Studies of Radiation Damage Induced by Various Energy Heavy Ions of Xe²⁶⁺ in Iron