Relationship Between the Trace Elements and Graphite Growth Morphologies in Cast Iron
2014 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 45, no 13, 6187-6199 p.Article in journal (Refereed) Published
The graphite morphology transition was studied using various techniques and additives in ultra-pure binary and ternary alloys with hypo- and hypereutectic compositions. Some of the trace elements were observed to stabilize the flake growth morphology of graphite, while others did not. The distance between the graphite basal planes of spheroidal, flake, and undercooled fine graphite was measured and the lattice fringes were studied using high resolution transmission electron microscope, after preparing a thin lamella of graphite using focused ion beam. Latent heat measurement was performed using differential scanning calorimeter on the pure binary alloy with and without sulfur and oxygen additions. The substitution of various elements under study in a monolayer of graphene was analyzed by considering the binding energies of the elements with C and their bonding nature. Simulations were performed using a molecule editor program and visualizer (Avogadro software), which considers various types of interatomic forces to optimize a monolayer of graphene to a minimum energy. The effect of the type of cyclic C-ring structure and energy of the basal plane of graphite with a connection to the addition of trace elements individually in the monolayer of graphene was studied and simulated to understand the resulting bulk graphite growth morphology.
Place, publisher, year, edition, pages
2014. Vol. 45, no 13, 6187-6199 p.
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-155674DOI: 10.1007/s11661-014-2589-2ISI: 000344334900036ScopusID: 2-s2.0-84919665589OAI: oai:DiVA.org:kth-155674DiVA: diva2:761709
QC 201411072014-11-072014-11-072014-12-05Bibliographically approved