The Effect of Ultrasonic Treatment on the Oxidation Resistance and Microstructure of Fe80Cr20 Alloy Powder at High Temperature Oxidation Process

Abstract

Effect of ultrasonic treatment on the oxidation kinetics and microstructure of Fe80Cr20alloy is investigated. The aim of this study is to improve the surface morphology and oxidation resistance of the Fe80Cr20alloy powder as a raw material. Ultrasonic technique is very promise technology and not yet fully explored. The Fe80Cr20material was treated by ultrasonic technique (UT) at various times of 3.5 h, 4.5 h, 5 h and followed by cold compaction with force of 13 Newton. The oxidation test was carried out using tube furnace under argon gas environment with 5 cycles, which has been considered. It was found that the UT has improved the surface morphology of the material effectively. Ultrasonic was revealed that the good interparticle bonding when experimented with ultrasonic treatment at 4.5 h. In the oxidation test, the lowest mass gain of 68 mg/cm2was found at the oxidation time of 100 h. Meanwhile, the lowest parabolic rate constant of 6.8198 x 10-14g2cm-4s-1was revealed when ultrasonic for 4.5 h sample.