The hot corrosion behaviour of a modified Ti3Al-based alloy under thin Na2SO4deposit film was investigated at910and950°C in air.The corrosion product was identified by XRD and its morphologies on the surface and ...The hot corrosion behaviour of a modified Ti3Al-based alloy under thin Na2SO4deposit film was investigated at910and950°C in air.The corrosion product was identified by XRD and its morphologies on the surface and cross-section were observed bySEM.The alloy suffered from considerable hot corrosion attack.The mass gain versus time curves obtained by TGA exhibited tworegions of different kinetics.The whole corroded layer consisted of loose and porous mixture oxides of TiO2,Nb2O5and Al2O3.Numerous small nodules of corrosion product were observed.An illustrative schematic was established to describe the formationprocess of such nodules.It seemed that the refractory oxides played a significantly important role in determining the development ofhot corrosion attack.展开更多
Based on Archimedes principle, the densities of Na 2WO 4 WO 3 ZnO melts at a fixed mole ratio of 3.43 of Na 2WO 4 to ZnO were measured. The results indicated that there was a linear relationship between the...Based on Archimedes principle, the densities of Na 2WO 4 WO 3 ZnO melts at a fixed mole ratio of 3.43 of Na 2WO 4 to ZnO were measured. The results indicated that there was a linear relationship between the densities and temperatures at a fixed composition. At a fixed temperature, the linear relationship between densities and compositions showed different slop within different composition regions. The reasons were explained in view of ionic composition changes.展开更多
The mechanism of electroreduction olf molybdenun in molten KF-B_(2)O_(3)-K2MoO_(4) has been sttdied byrneuns of linear sweep voltammetry.cyclic voltammetry and chronopotentiometry.
基金Projects(51271191,51571205)supported by the National Natural Science Foundation of China
文摘The hot corrosion behaviour of a modified Ti3Al-based alloy under thin Na2SO4deposit film was investigated at910and950°C in air.The corrosion product was identified by XRD and its morphologies on the surface and cross-section were observed bySEM.The alloy suffered from considerable hot corrosion attack.The mass gain versus time curves obtained by TGA exhibited tworegions of different kinetics.The whole corroded layer consisted of loose and porous mixture oxides of TiO2,Nb2O5and Al2O3.Numerous small nodules of corrosion product were observed.An illustrative schematic was established to describe the formationprocess of such nodules.It seemed that the refractory oxides played a significantly important role in determining the development ofhot corrosion attack.
文摘Based on Archimedes principle, the densities of Na 2WO 4 WO 3 ZnO melts at a fixed mole ratio of 3.43 of Na 2WO 4 to ZnO were measured. The results indicated that there was a linear relationship between the densities and temperatures at a fixed composition. At a fixed temperature, the linear relationship between densities and compositions showed different slop within different composition regions. The reasons were explained in view of ionic composition changes.
基金supported by the National Natural Science Foundation
文摘The mechanism of electroreduction olf molybdenun in molten KF-B_(2)O_(3)-K2MoO_(4) has been sttdied byrneuns of linear sweep voltammetry.cyclic voltammetry and chronopotentiometry.
