After a facile pretreatment of graphite, nickel-coated graphite
powderswere prepared by electroless platingwithNaBH4. The influences
of distinct agitation modes on the surface morphology, phase composition,
adhesion, deposition rate, and growth mechanism of Ni–B coatings
were investigated. The conclusions are as follows:
1. The facile pretreatment improves the wettability and activity of
graphite.
2. Continuous and uniformamorphous Ni–B coatingswere achieved on
graphite by electroless plating under mechanical or ultrasonic
agitation.
3. Formechanical agitation process, the coating exhibits a sesame-seed
slice-like structure which is composed of large spherical grains.
4. The ultrasonic agitation process results in a faster deposition rate and
a well-knit membrane-like structure coating free of voids.
5. The easier nucleation and fine particle distribution of nickel nuclei
under the ultrasonic agitation process leads to high quality coating.
 
After a facile pretreatment of graphite, nickel-coated graphitepowderswere prepared by electroless platingwithNaBH4. The influencesof distinct agitation modes on the surface morphology, phase composition,adhesion, deposition rate, and growth mechanism of Ni–B coatingswere investigated. The conclusions are as follows:1. The facile pretreatment improves the wettability and activity ofgraphite.2. Continuous and uniformamorphous Ni–B coatingswere achieved ongraphite by electroless plating under mechanical or ultrasonicagitation.3. Formechanical agitation process, the coating exhibits a sesame-seedslice-like structure which is composed of large spherical grains.4. The ultrasonic agitation process results in a faster deposition rate anda well-knit membrane-like structure coating free of voids.5. The easier nucleation and fine particle distribution of nickel nucleiunder the ultrasonic agitation process leads to high quality coating.
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