Abstract: The composition,
microstructure and wear resistance of electroless deposited
nickel-phosphorus alloy coatings were studied. The results
showed that the alloys containing phosphorus lower than 7.0 wt%
were super-satureated solid solution which precipitated Ni3P and
was hardly effected by composite SiC, amorphous alloys
containing phosphorus more than 7.0 wt% crystallized and formed
the microstructure of Ni3P-matrix during heat treatment. The
wear volume of high phosphorus alloys was higher than that of
low phosphorus coatings in as-deposited state, and lower in
as-heated. The wear resistance of low phosphorus SiC composite
coating with high hardness was superior to nickel phosphorus
alloy coatings.
Key words:
Nickel-phosphorus alloys SiC
composite coating microstructure Wear resistance
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