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首页> 外文期刊>Journal of coatings technology and research >Electrodeposited nickel-phosphorous (Ni-P) alloy coating: an in-depth study of its preparation, properties, and structural transitions
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Electrodeposited nickel-phosphorous (Ni-P) alloy coating: an in-depth study of its preparation, properties, and structural transitions

机译：电沉积镍-磷（Ni-P）合金涂层：对其制备，性能和结构转变的深入研究

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摘要

Ni-P deposits with a phosphorous content of up to 20% (wt) were obtained on AA6061 substrates by direct current electrodeposition technique from a solution containing nickel sulfate, nickel chloride, phosphorous acid, phosphoric acid, and a wetting agent (sodium lauryl sulfate). The effect of various plating parameters like current density, concentration of phosphorous acid, concentration of phosphoric acid and plating temperature on the P content of the coating as well as the rate of deposition was investigated systematically. It has been observed that the influence of current density on the P content of the deposit is largely dependent on the concentration of phosphorous acid in the plating bath. Composition, surface morphology, microstructure, and mechanical properties of the Ni-P deposits were studied using SEM, ED AX, XRD, and nanoindentation techniques. Ni-P electrodeposits with low P content in the range of 4-7 wt% of P exhibited superior microhardness of 7.74-8.57 GPa. With increasing P content in the deposit, the structure undergoes transition from crystalline to nanocrystalline and becomes amorphous above 9.14 wt% of P. Ni-P alloys with some selected compositions were subjected to heat treatment at 400℃ for 1 h in a hot air oven and the resulting variation in mechanical properties was studied using nanoindentation technique.
机译：通过直流电沉积技术，从包含硫酸镍，氯化镍，亚磷酸，磷酸和湿润剂（十二烷基硫酸钠）的溶液中，通过直流电沉积技术在AA6061基板上获得磷含量高达20％（wt）的Ni-P沉积物。 ）。系统地研究了各种电镀参数，例如电流密度，亚磷酸的浓度，磷酸的浓度和电镀温度对涂层中P含量以及沉积速率的影响。已经发现，电流密度对沉积物中P含量的影响在很大程度上取决于镀浴中亚磷酸的浓度。使用SEM，ED AX，XRD和纳米压痕技术研究了Ni-P沉积物的组成，表面形态，微观结构和机械性能。在P的4-7 wt％范围内具有低P含量的Ni-P电沉积物表现出7.74-8.57 GPa的优良显微硬度。随着沉积物中P含量的增加，在P的9.14 wt％以上时，结构会从晶态转变为纳米晶，并变为非晶态。将具有某些选定成分的Ni-P合金在热风炉中于400℃热处理1 h。并使用纳米压痕技术研究了机械性能的变化。

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