Effects of Ce in novel bronze and its plasma sprayed coating

Li, Wensheng, Liu, Yi, Wang, Zhiping, Ma, Chao and Wang, S.C. (2012) Effects of Ce in novel bronze and its plasma sprayed coating. Transactions of Nonferrous Metals Society of China, 22 (9), 2139-2145. (doi:10.1016/S1003-6326(11)61440-4).

Abstract

A novel aluminum bronze over the Cu?Al binary alloy eutectoid Cu?14Al?4.5Fe was prepared by a jointly-charging one-melting technique and conventional sand casting. The bronze coatings were atmospherically plasma sprayed on the 45# medium carbon steel substrate. The effect of rare earth Ce on the microstructures and Vickers hardness of the cast alloy and coatings were characterized by scanning electron microscopy, X-ray diffraction, electronic probe microanalysis, transmission electron microscopy and microhardness measurements. The results indicate that the hardness of both as-cast alloy and coating are enhanced by the addition of 0.6% Ce due to the refinement of ? phases which are well distributed in the matrix. The rapid solidification in the plasma spray processing retains Fe-supersaturated in the Al-bronze alloy coatings, which avoids the formation of eutectoid (?+?2) phase and stacking faults are found in the coatings with Ce added, accordingly improves the mechanical properties.

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