An in situ study of sintering behavior and phase transformation Kinetics in NiTi using neutron diffraction

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dc.contributor.authorChen, Gen_AU
dc.contributor.authorLiss, KDen_AU
dc.contributor.authorCao, Pen_AU
dc.date.accessioned2017-07-03T00:37:39Zen_AU
dc.date.available2017-07-03T00:37:39Zen_AU
dc.date.issued2015-09-15en_AU
dc.date.statistics2017-06-03en_AU
dc.description.abstractThe powder sintering behavior of NiTi from an elemental powder mixture of Ni/Ti has been investigated, using an in situ neutron diffraction technique. In the sintered alloys, the overall porosity ranges from 9.2 to 15.6 pct, while the open-to-overall porosity ratio is between 8.3 and 63.7 pct and largely depends on the sintering temperature. In comparison to powder compacts sintered at 1223 K and 1373 K (950 °C and 1100 °C), the powder compact sintered at 1153 K (880 °C) shows a much smaller pore size, a higher open-to-overall porosity ratio but smaller shrinkage and a lower density. Direct evidence of eutectoid transformation in the binary Ni-Ti system during furnace cooling to ca. 890 K (617 °C) is provided by in situ neutron diffraction. The intensities of the B2-NiTi reflections decrease during the holding stage at 1373 K (1100 °C), which has been elaborated as an extinction effect according to the dynamical theory of neutron diffraction, when distorted crystallites gradually recover to perfect crystals. The analysis on the first five reflections clarifies the non-existence of any order–disorder transition in the NiTi phase from B2-to-BCC structure.Copyright © 2015, Springer Natureen_AU
dc.identifier.citationChen, G., Liss, K.-D., & Cao, P. (2015). An In situ study of sintering behavior and phase transformation kinetics in NiTi using neutron diffraction. Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, 46A(12), 5887-5899. doi: 10.1007/s11661-015-3156-1en_AU
dc.identifier.govdoc8382en_AU
dc.identifier.issn1543-1940en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleMetallurgical and Materials Transactions A - Physical Metallurgy and Materials Scienceen_AU
dc.identifier.pagination5887-5899en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s11661-015-3156-1en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8838en_AU
dc.identifier.volume46Aen_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectNeutron diffractionen_AU
dc.subjectAlloysen_AU
dc.subjectPorosityen_AU
dc.subjectSinteringen_AU
dc.subjectSuperlatticesen_AU
dc.subjectNickelen_AU
dc.subjectTitaniumen_AU
dc.titleAn in situ study of sintering behavior and phase transformation Kinetics in NiTi using neutron diffractionen_AU
dc.typeJournal Articleen_AU
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