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首页> 外文期刊>Nanotechnology >Pulsed co-electrodeposition and characterization of Ni-based nanocomposites reinforced with combustion-synthesized, undoped, tetragonal-ZrO2 particulates
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Pulsed co-electrodeposition and characterization of Ni-based nanocomposites reinforced with combustion-synthesized, undoped, tetragonal-ZrO2 particulates

机译：燃烧合成未掺杂四方ZrO2颗粒增强的Ni基纳米复合材料的脉冲共电沉积和表征

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摘要

Nanostructured nickel matrix composites reinforced with nanosized, undoped, tetragonal zirconia has been synthesized by cathodic pulsed electrodeposition. The reinforcement is synthesized by the aqueous combustion synthesis route with glycine as the fuel and zirconyl nitrate as the oxidizer. The reinforcement and composite have been characterized by XRD, TEM and SEM coupled with EDS. The microhardness and thermal stability (Kissinger method) of the composite are evaluated. These values are compared with those of pure nickel deposited under the same conditions. The results show that the microhardness of the nickel matrix is enhanced by the presence of the reinforcement from 450 to 575 VHN. Also the strengthening due to grain size effects and dispersion strengthening effect are evaluated individually and the interparticle separation is estimated to be around 85 nm. The volume fraction of the reinforcement is estimated to be 12-15% and the particles are uniformly distributed and monodispersed in the nickel matrix. The thermal stability of the composite is better than that of pure nickel in contrast to some of the reported literature.
机译：通过阴极脉冲电沉积合成了纳米结构，未掺杂的四方氧化锆增强的纳米结构镍基复合材料。补强物是通过以甘氨酸为燃料，硝酸氧锆为氧化剂的水相燃烧合成路线合成的。通过XRD，TEM和SEM结合EDS对增强材料和复合材料进行了表征。评价了复合材料的显微硬度和热稳定性（Kissinger方法）。将这些值与在相同条件下沉积的纯镍的那些值进行比较。结果表明，从450 VHN到575 VHN的增强，镍基体的显微硬度得以提高。此外，还分别评估了由于晶粒尺寸效应和分散强化效应而引起的强化，颗粒间的分离度估计为85 nm左右。增强物的体积分数估计为12-15％，并且颗粒均匀分布并单分散在镍基体中。与一些已报道的文献相比，该复合材料的热稳定性优于纯镍。

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