In situ neutron diffraction study on the effect of aluminium fluoride on phase transformation of mullite from alumina/clay

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dc.contributor.authorTezuka, Nen_AU
dc.contributor.authorLow, IMen_AU
dc.contributor.authorDavies, IJen_AU
dc.contributor.authorAlecu, Ien_AU
dc.contributor.authorStead, Ren_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorMehrtens, EGen_AU
dc.contributor.authorLatella, BAen_AU
dc.date.accessioned2021-08-02T05:03:40Zen_AU
dc.date.available2021-08-02T05:03:40Zen_AU
dc.date.issued2007-09-16en_AU
dc.date.statistics2021-07-05en_AU
dc.description.abstractThe effect of aluminium fluoride (AIF3) on the phase transformation sequence of mullite (3AI2032Si02) from two different types of kaolin (kaolinite and halloysite) (AI2Si20s(OH)4-2H20) within an alumina (A1203) matrix for a temperature range of 20 - 1500 C was investigated using in situ neutron diffraction. Samples containing a mixture of A1F3 (0 - 5 wt%), AI203 and kaolin were heated up to 1500 C and then furnace cooled. During the heating procedure, one hour neutron diffraction scans were conducted at 600, 900, 1100, 1200, 1300 and 1400 C, followed by six consecutive one hour scans at 1500 C and finally a one hour scan at room temperature upon cooling. The diffraction patterns collected between 1100 and 1500 C were analyzed by Rietveld analysis. The observed phase transformations exhibited a typical sequence found inclay/alumina ceramics. Corundum, mullite and cristobalite were observed. A common feature among the specimens containing different amounts of AIF3 and kaolin was that the content of corundum decreased as the amount of mullite increased, whilst the cristobalite content tended to peak near the temperature where the amounts of corundum and mullite were approximately equal. The mullitization temperature was reduced as the AIF3 content increased for both kaolinite and halloysite. The presence of AIF3 appeared to reduce the onset temperature for mullite nucleation, which is at a much lower temperature compared to that of grain growth. However, AIF3 also seemed to lower densification. Likewise mechanical properties of the resulting specimens were determined. © MS&T07en_AU
dc.identifier.citationTezuka, N., Low, I., Davies, I., Alecu, I., Stead, R., Avdeev, M., Mehrtens, E., & Latella, B. (2007). In situ neutron diffraction study on the effect of aluminium fluoride on phase transformation of mullite from alumina/clay. Paper presented at International Symposium on Ceramic Matrix Composites September 16-20, Detroit, Michigan. In Materials Science and Technology, 4, pp. 2224-2233.en_AU
dc.identifier.conferenceenddate20 September 2007en_AU
dc.identifier.conferencenameInternational Symposium on Ceramic Matrix Compositesen_AU
dc.identifier.conferenceplaceDetroit, Michigan.en_AU
dc.identifier.conferencestartdate16 September 2007en_AU
dc.identifier.isbn1118000447en_AU
dc.identifier.isbn9781118000441en_AU
dc.identifier.journaltitleMaterials Science and Technologyen_AU
dc.identifier.paginationp 2224-2233en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11224en_AU
dc.identifier.volume4en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley & Sons Incen_AU
dc.subjectMulliteen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectFluoridesen_AU
dc.subjectAluminiumen_AU
dc.subjectPhase transformationsen_AU
dc.subjectKaolinen_AU
dc.subjectCristobaliteen_AU
dc.subjectCorundumen_AU
dc.subjectOxide mineralsen_AU
dc.titleIn situ neutron diffraction study on the effect of aluminium fluoride on phase transformation of mullite from alumina/clayen_AU
dc.typeConference paperen_AU
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