Phase analyses of the Co-Fe-Pd ternary alloys

Conference of the South African Advanced Materials Initiative 2018

Dyal Ukabhai, K.^1,2 ; Mwamba, I.A.^2,3 ; Cornish, L.A.^1,2

School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa^1

DST-NRF Centre of Excellence in Strong Materials, Hosted by University of the Witwatersrand, Johannesburg, South Africa^2

Advanced Materials Division, Mintek, Randburg, South Africa^3

关键词: Arc furnaces;    Argon atmospheres;    As-cast;    Composition ranges;    Energy dispersive X ray spectroscopy;    Phase analysis;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/430/1/012023/pdf
DOI  :  10.1088/1757-899X/430/1/012023

来源: IOP

【 摘 要 】

Samples of different compositions of Co-Fe-Pd were made in a button arc furnace, under an argon atmosphere on a water-cooled copper hearth. They were sectioned and a half was kept in the as-cast state. The samples were analysed in a scanning electron microscope with energy dispersive X-ray spectroscopy, and in an X-ray diffractometer to derive the microstructures and to determine the overall and phase compositions. Coring occurred in many samples, which was expected due to the wide composition range of the main solid solution in the system. The microstructures were not similar to any of the work of sixty years ago when the Co-Fe-Pd phase diagram was studied. Some of the phases were too fine to be analysed with EDS in the as-cast samples.