Synthesis and Tribological Performance of Different Particle-Sized Nickel-Ion-Exchanged α-Zirconium Phosphates
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Nickel-ion-exchanged α-zirconium phosphate (Ni-α-ZrP) was synthesized by a mild hydrothermal synthesis method. Different raw material ratios (NaF/H3PO4/Ni(CH3COO)2·4H2O) influence the particle size of the Ni-α-ZrP samples. The grain size could be controlled and distributed from 20 to 600 nm. Ni-α-ZrP was evaluated as an additive in lithium grease in a four-ball test. A 3.0 wt.% addition of Ni-α-ZrP to lithium grease yielded maximum non-seizure load values of 1235 N, and the wear scar diameter on the lower balls is 0.42 mm at 294 N. Compared with smaller particles, the addition of Ni-α-ZrP with a larger particle size to grease yields a better load-carrying capacity.
Keywordsadditive manufacturing hydrothermal synthesis lithium grease nickel-ion-exchanged α-zirconium phosphate particle size tribological properties
This work was financially supported by the Key Program of National Natural Science Foundation of China (Grant No. 21436008), the General Program of National Natural Science Foundation of China (Grant No. 51372162), Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 21506145) and the Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant No. 2015021032).
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