Formation of Ti-Al-ZrO₂ Film on the Surface of Mechanical Alloying Ball

Abstract

Mechanical alloying(MA) for the mixture of Ti-34mass%Al powder, dried zirconia sol powder and stearic acid was performed by a vibrational ball mill for 720ksec in Ar gas atmosphere under pressure of 35kPa.
The Ti-Al-ZrO₂ film was obtained on the surface of a stainless steel ball after MA and this coating film was 8μm thickness. The surface of this ball was smoothed by polishing with fine ceramic particles. The formation of this film occured in the stable adhesion of MA powder on the surface of MA balls during MA process and was promoted by stearic acid and crystal water of the dried zirconia sol.