Inviscid melt spinning (IMS) and phase identification of CaOAl₂O₃MgO fiber

CaOAl₂O₃MgO (CAM) fibers were produced using inviscid melt spinning (IMS). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to examine a fiber morphology and identify the non-equilibrium/equilibrium phases in CAM fibers. The SEM of as-spun CAM fibers showed a surface roughness indicating a crystallinity and some porosity due to a gas evolution during fiber processing. The as-spun CAM fibers showed a formation of the non-equilibrium crystalline phases of MgO·Al₂O₃, CaO·Al₂O₃ and α-Al₂O₃, whereas the CAM fibers heat treated at 1000°C for 24 h showed a formation of the equilibrium phases of 3CaO·5Al₂O₃ and α-Al₂O₃.