Phase relation and thermodynamics in Iron-lead-sulphur system.
Date
1992
Authors
Ozok, Hakan
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
PHASE RELATION AND THERMODYNAMICS
IN IRON-LEAD-SULFTJR dYSTBM
In this investigation, phase relations and thermodynamic
properties in the ternary system Fe-Pb-S were determined.
High temperature phase relations in the FeS-PbS binary
system were established by quenching samples equilibrated
in evacuated and sealed silicla tubes. The eutectic
temperature was found to be 842"C at 46 atomic percent
PbS. Activities of PbS in this system were measured at
1100· and 1200°C by the dew-point technique, and negative
deviations were observed.' Krupkowski solution model was
applied to the measured activities and experimentally
measured liquidus lines were verified.
Within the Fe-Pb-S ternary system, the boundaries of the
immiscibility region together with the tie-line
distributions were drawn at 1200°C. Activities of lead
were measured by the dew point technique. Furthermore,
lead, iron and sulphur activities were calculated by
modelling along the ternary miscibility gap.
Description
A dissertation submitted to the Faculty of Engineering,
University of the Witwatersrand,
Johannesburg, in fulfilment of
the requirements for the degree of Master
of Science in Engineering.
Keywords
LEAD ALLOYS--METALLOGRAPHY., PHASE DIAGRAMS, TERNARY., PHASE DIAGRAMS., THERMODYNAMICS.