Mössbauer effect study of nitrogen-implanted iron foils

Longworth, G.; Hartley, N. E. W.

doi:10.1016/0040-6090(78)90335-8

Cited by 133 publications

(10 citation statements)

References 12 publications

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“…The sample implanted with N' only (figure 2, curve A), presents an additional magnetic component with Mossbauer parameters (see table 1) very similar to those previously measured for y'-Fe4N (Nozik et a1 1970). This result is consistent with the work of Longworth and Hartley (1978) in nitrogen-implanted iron.…”

Section: Resultssupporting

confidence: 92%

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Carbonitride precipitation by successive implantation of carbon and nitrogen into pure iron

Santos

Baumvol

García

et al. 1984

J. Phys. D: Appl. Phys.

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Conversion electron Mossbauer spectroscopy (CEMS) and X-ray photoelectron spectroscopy (XPS) was used to investigate the precipitation of carbonitrides by successive implantation of carbon and nitrogen into pure iron. The authors have analysed two samples, differing by the order of implantation of the two ionic species. Although the as-implanted surface compositions are rather different, thermal annealing of both samples at 300 degrees C results in the formation of the same kind of precipitate, namely epsilon -Fe3(C,N).

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Section: Resultssupporting

confidence: 92%

“…The spectrum B was fitted with four magnetic sextets and one paramagnetic doublet (see table 1). The component H I is characteristic of the martensite (Longworth and Hartley 1978). The sextets Hz and H3 and the doublet Ql can be attributed to the cementite-like carbonitride &Fe3 (C, N) (dos Santos et a1 1983).…”

Section: Resultsmentioning

confidence: 99%

Carbonitride precipitation by successive implantation of carbon and nitrogen into pure iron

Santos

Baumvol

García

et al. 1984

J. Phys. D: Appl. Phys.

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“…When the carbon concentration is low (60.2 wt%) the precipitation in the as-implanted samples is driven by the implanted dose. In this case the results are similar to those obtained in nitrogen-implanted iron (Longworth and Hartley 1978). That is to say for 2 X 1017 N+ ion cm-2, we have approximately 25 at% N in the peak concentration (Longworth 19Sl), and accordingly the CEMS spectrum shows the precipitation of a cementite-like carbonitride (figure 1, curve B).…”

Section: Surface Composition and Thermal Evolutionsupporting

confidence: 85%

Surface modifications and the mechanical properties of carbon steels implanted with nitrogen

Santos

Behar

Baumvol

1984

J. Phys. D: Appl. Phys.

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Discusses the relationships between the surface composition and the mechanical properties of carbon steels implanted with nitrogen. Conversion electron and X-ray Mossbauer spectroscopy (CEMS and CXMS) were used to investigate the surface modifications of the implanted samples. Thermal annealing was performed in high vacuum, at temperatures between 250 and 500 degrees C, in order to simulate the temperature increase in real tribological processes. It is shown that the improved performance of nitrogen-implanted carbon steels against wear and fatigue is mainly due to the action of finely dispersed iron carbonitrides ( theta - and epsilon -Fe3(C,N)). It is shown also that the persistence of the protective action at greater depths is associated with the in-diffusion of nitrogen released by thermal decomposition of the compounds formed at the surface.

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“…For this process a temperature of little more than 100 "C is sufficient. The phase Fe,N is mostly found if iron or steel are implanted with high doses of nitrogen and the sample temperature during implantation is kept low [4,11,13 to 151. It seems to be responsible for the improved wear behaviour.…”

Section: Resultsmentioning

confidence: 99%

CEMS measurements on ion implanted tool steels

Reuther¹,

Richter²,

Szücs

1990

phys. stat. sol. (a)

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Conversion electron Mössbauer spectroscopy (CEMS) is studied on two tool steels (210Cr46 and 90MnV8) which show a pronounced improved wear behaviour after ion implantation with carbon and nitrogen, respectively. The Mössbauer spectra of the untreated steels show martensitic and austenitic fractions. The martensitic fractions strongly decrease and new subspectra which may be ascribed to other phases appear.

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Mössbauer effect study of nitrogen-implanted iron foils

Cited by 133 publications

References 12 publications

Carbonitride precipitation by successive implantation of carbon and nitrogen into pure iron

Carbonitride precipitation by successive implantation of carbon and nitrogen into pure iron

Surface modifications and the mechanical properties of carbon steels implanted with nitrogen

CEMS measurements on ion implanted tool steels

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