An Al62.5Cu25Fe12.5 quasi-crystalline alloy was prepared by are melting. X-ray diffraction and scanning electron microscopy were used to study the microstructure of the quasi-crystalline alloy. Isothermal weight gain ...An Al62.5Cu25Fe12.5 quasi-crystalline alloy was prepared by are melting. X-ray diffraction and scanning electron microscopy were used to study the microstructure of the quasi-crystalline alloy. Isothermal weight gain of the Al-Cu-Fe quasi-crystal at elevated temperature in dry air was measured by means of a thermal balance and the oxidation behavior was evaluated by oxidation kinetic curves, from which it was deduced that the quasi-crystal exhibits good oxidation resistance. The surface morphologies of the Al-Cu-Fe quasi-crystal after isothermal oxidation at 700°C and 800°C for different times were observed. The oxidation resistance of quasi-crystalline powder and normal crystalline powder in the Al-Cu-Fe system was also quantitatively compared in quantity.展开更多
文摘An Al62.5Cu25Fe12.5 quasi-crystalline alloy was prepared by are melting. X-ray diffraction and scanning electron microscopy were used to study the microstructure of the quasi-crystalline alloy. Isothermal weight gain of the Al-Cu-Fe quasi-crystal at elevated temperature in dry air was measured by means of a thermal balance and the oxidation behavior was evaluated by oxidation kinetic curves, from which it was deduced that the quasi-crystal exhibits good oxidation resistance. The surface morphologies of the Al-Cu-Fe quasi-crystal after isothermal oxidation at 700°C and 800°C for different times were observed. The oxidation resistance of quasi-crystalline powder and normal crystalline powder in the Al-Cu-Fe system was also quantitatively compared in quantity.
