|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||Effect of Titanium Addition on Microstructure and Oxidation Behaviour of Nb-Si-Mo Alloys at 1300˚C
||Kasturi Sala, Rahul Mitra
|On-Site Speaker (Planned)
The present study deals with microstructure and high temperature oxidation resistance of arc melted Nb-Si-Mo alloys with Ti as the alloying element. Studies on microstructures using XRD and SEM primarily reveal the presence of Nbss and (Nb, Ti)5Si3. The nature, morphology and the amount of phases, as well as the eutectic domains, are found to vary with the composition of the investigated alloys. Isothermal oxidation experiments have been carried out in dry air at 1300˚C for 12 hours and the kinetics has been examined by the power-law equation. The studies show that the quaternary hypereutectic Nb-Si-Mo-Ti alloys undergo less mass gain compared to those having the hypoeutectic composition. The results of XRD and SEM analysis have shown that the oxide scales of all the alloys are made of Nb2O5, TiO2 and SiO2. The hypo or hypereutectic character of the alloys controls the oxidation behavior at 1300˚C, and will be discussed.
||Planned: Supplemental Proceedings volume