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RESEARCH PRODUCT
Thermal oxidation of the intermetallic phases Al 8 Mo 3 and AlMo 3
Angela MöllerJ. TappAlexander HagenowMichael Ostersubject
010302 applied physicsThermal oxidationMaterials scienceInorganic chemistryAnalytical chemistryIntermetallicInfrared spectroscopy02 engineering and technologyAtmospheric temperature range021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic MaterialsInorganic ChemistryThermogravimetryPhase (matter)0103 physical sciencesOxidizing agentMaterials ChemistryCeramics and CompositesPhysical and Theoretical Chemistry0210 nano-technologyThermal analysisdescription
Abstract The thermal oxidation reactions of the intermetallic phases Al8Mo3 and AlMo3 were investigated and analyzed by ex-situ powder-x-ray diffraction (XRD), difference thermal analysis (DTA), thermogravimetry (TGA), and infrared spectroscopy (IR). The initial oxidation reactions in air were found to yield Al2O3 and AlMo3 in the case of Al8Mo3 (Tonset =725 °C), and MoO3 as well as Al8−xMo3 (Tonset =435 °C) for the pure intermetallic phase AlMo3, respectively. Thus, both intermetallic phases are coexisting in an equilibrium within a temperature range of 300 °C under oxidizing conditions. The formation of β-Al2(MoO4)3 followed the second oxidizing process of the respective minority component at elevated temperatures. Decomposition and evaporation of the volatile MoO3 yielded α-Al2O3 as the residue at 1000 °C.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-07-01 | Journal of Solid State Chemistry |