Effect of carbon on interstitial ordering and magnetic properties of epsilon-Fe-2(N,C)(1-z)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00473572" target="_blank" >RIV/61389005:_____/17:00473572 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jallcom.2016.09.317" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2016.09.317</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2016.09.317" target="_blank" >10.1016/j.jallcom.2016.09.317</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of carbon on interstitial ordering and magnetic properties of epsilon-Fe-2(N,C)(1-z)

Popis výsledku v původním jazyce

Hexagonal epsilon-iron nitride and e-iron carbonitride phases are formed on nitriding and nitrocarburizing of iron and steel surfaces and can exist in broad compositional ranges. Long-range nitrogen ordering and magnetic properties for epsilon-iron nitrides and their dependence on composition have been the focus of several studies. So far, limited attention has been paid to the carbonitrides. In the current work, the effects of substitution of nitrogen by carbon on the interstitial ordering and magnetic properties in Fe-2(C,N)(1-z) are explored using neutron diffraction, Mossbauer spectroscopy and vibrating sample magnetometry. Neutron diffraction patterns showed 001 and 301 superstructure reflections, confirming a previously proposed structural model in space group P (3) over bar1 m (compared to P6(3)22 for the pure nitrides). On partial substitution of nitrogen by carbon in epsilon-iron nitride the Curie temperature, the saturation magnetization and the hyperfine fields of the iron atoms are increased, while isomer shifts are decreased. The effects on the a and c lattice parameters indicate a change in interstitial ordering, which is related to more favorable interactions between a nitrogen and carbon atom than among nitrogen atoms. This interaction leads to additional interstitial (short-range) ordering and a decrease in the c lattice parameter, while the a lattice parameter is largely unaffected.

Název v anglickém jazyce

Effect of carbon on interstitial ordering and magnetic properties of epsilon-Fe-2(N,C)(1-z)

Popis výsledku anglicky

Hexagonal epsilon-iron nitride and e-iron carbonitride phases are formed on nitriding and nitrocarburizing of iron and steel surfaces and can exist in broad compositional ranges. Long-range nitrogen ordering and magnetic properties for epsilon-iron nitrides and their dependence on composition have been the focus of several studies. So far, limited attention has been paid to the carbonitrides. In the current work, the effects of substitution of nitrogen by carbon on the interstitial ordering and magnetic properties in Fe-2(C,N)(1-z) are explored using neutron diffraction, Mossbauer spectroscopy and vibrating sample magnetometry. Neutron diffraction patterns showed 001 and 301 superstructure reflections, confirming a previously proposed structural model in space group P (3) over bar1 m (compared to P6(3)22 for the pure nitrides). On partial substitution of nitrogen by carbon in epsilon-iron nitride the Curie temperature, the saturation magnetization and the hyperfine fields of the iron atoms are increased, while isomer shifts are decreased. The effects on the a and c lattice parameters indicate a change in interstitial ordering, which is related to more favorable interactions between a nitrogen and carbon atom than among nitrogen atoms. This interaction leads to additional interstitial (short-range) ordering and a decrease in the c lattice parameter, while the a lattice parameter is largely unaffected.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LM2015056" target="_blank" >LM2015056: Centrum urychlovačů a jaderných analytických metod</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

694

Číslo periodika v rámci svazku

FEB

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

282-291

Kód UT WoS článku

000390622900040

EID výsledku v databázi Scopus

2-s2.0-84991474914