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Effects of rare earth yttrium on microstructure of Ni–16Mo–7Cr–4Fe alloy were examined by optical microscopy, scanning electron microscopy, transmission electron microscopy and X-ray fluorescence. M6C phase was observed in the alloys with and without yttrium addition, and Ni17Y2 phase existed in the alloys containing 0.05–0.43wt.% yttrium simultaneously. The amount of Ni17Y2 phase increased as yttrium...
The deposits of electroless nickel-phosphorus fabricated in different process were studied by means of OM, XRD and DTA. Three different kinds of microstructure, such as nano-crystalline, amorphous and co-existence of both, could be obtained by adjusting the process. Moreover, the hardness of the deposit changed according to the different microstructure. The hardness of deposit had a great increasing...
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