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a study of making iron aluminide alloy powders with new rotating electrode technology

厦门大学学报（自然科学版） 2002年第S1期41卷 107-108页

作者： S S LIAN M L SHI Department of Materials Science & Engineering National Taiwan UniversityDepartment of Materials Science & Engineering National Taiwan University Taipei ChinaTaipei China

A new process was used for producing FeAl alloy pow de rs with double consumable rotating electrodes and the powders made in this appar atus were analyzed. In this new technology, tungsten rod serves as a cathode ele ctrode, while the alloy rod as an anode electrode. The conventional rotating ele ctrode process must have an anode with pre-melting alloys; however, in this new process, using pure iron as cathode electrode and pure aluminum as anode electr ode can eliminate the step of pre-melting. The effects of process variables, which include electrode rotational speed, a nd electrode diameter of the mean particle diameter were determined. Results showed that both the rotational speed and diameter of electrodes would a ffect the mean diameter of particles. There are three kinds of powders with diff erent composition produced in this study and the possible mechanisms are discuss ed. The process parameters and volume mean diameter of the powders have been cor related to find an experimental equation. The results show that when the rotational speed and the diameter of the anode el ectrode are increased, the powders size will decrease. However, the powders size will increase with cathode electrode.

关键词： a study of making iron aluminide alloy powders with new rotating electrode technology

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