The objectives of this study are to explore the high energy ball milling combined with ultrasonic treatment to develop smaller crystallite size, finer surface morphology, higher thermal stability and more homogenous nanocrystalline FesoCr20 alloys. The process that combined both is not hlly investigated. They are carried out by high energy ball milling with milling time of 60 h and ultrasonic t…
The aim of this study is to investigate the effect of depth implantation of lanthanum on the oxidation of Fe80Cr20 alloys. Intermetallic FeCr was developed by mechanical alloying technique with milling time 40 h and 60 h respectively and followed by hot compaction process at a temperature of 1273 K and pressure of 25 MPa. The specimens were implanted with Lanthanum dopant with doses of 10…
The oxidation behaviour of newly developed process of Fe80Cr20Fe80Cr20 alloy was studied as a function of temperature in the range 1173‐1273 K for up to 100 h in flowing air, which corresponds to the Solid Oxide Fuel Cell (SOFC) environment operating conditions. The effects of rare earth element implantation and depth profile on the oxidation behaviour of specimens were analyzed based on oxid…
The γ-alumina powder is a potential material for washcoat application. This paper shows the preparation of γ-alumina using ultrasonic technique in order to obtain nanocrystalline of γ-alumina powder. The 50 gr of the γ-alumina powders was treated in the 250 gr ethanol solution using ultrasonic technique within 10, 20, 30, and 60 minutes, respectively. The process of sonication was set at th…
The oxidation behaviour of developed Fe80Cr20 alloy and commercial ferritic steel at 1173 - 1373 K in air is studied. Effects of crystallite size and titanium implantation on the oxidation behaviour of specimens were analyzed based on oxide morphologies and microstructures. Oxide scales characterisations of specimen after oxidized were identified by X-ray diffraction (XRD). The surface morpholo…