Study of Mn activities in Mn-Ni-C alloys by EMF measurements
2003 (English)In: Intermetallics (Barking), ISSN 0966-9795, Vol. 11, no 11-12, 1229-1235 p.Article in journal (Refereed) Published
The activities of manganese in Mn-Ni-C alloys have been studied by solid-state galvanic cell technique with CaF2 as the solid electrolyte. The measurements of electromotive force (EMF) have been carried out in the temperature range 920-1240 K. The main phase compositions of the alloys have been analyzed by X-ray diffraction (XRD). It was established that the substitution of Mn by Ni in the (MnNi)(23)C-6 carbide was limited, that the lattice parameter decreased slightly with increase in the Ni content and that a solid solution is formed between Mn and Ni. It was also found that the activity of manganese decreases with increase in the nickel content when the ratio of C/(Mn+C) is less than 8.3 wt.%, and that the negative effect of Ni on the activity of Mn in Mn-Ni-C ternary system decreases as the carbon content increases. However, when the ratio of C/(Mn+C) is equal to 8.3 wt.% or more, the activity of manganese is independent of the nickel content.
Place, publisher, year, edition, pages
2003. Vol. 11, no 11-12, 1229-1235 p.
A. Ternary alloy systems, B. Thermodynamic and thermochemical properties
IdentifiersURN: urn:nbn:se:kth:diva-5209DOI: 10.1016/S0966-9795(03)00163-8ISI: 000186687100020OAI: oai:DiVA.org:kth-5209DiVA: diva2:8026
QC 201009302004-10-082004-10-082010-09-30Bibliographically approved