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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Ti Content and Annealing on Fracture Toughness and Scratch Resistance of Electroless Ni-P-Ti Coatings
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Effects of Ti Content and Annealing on Fracture Toughness and Scratch Resistance of Electroless Ni-P-Ti Coatings

机译：Ti含量和退火对化学镜骨抗伤性韧性和耐刮擦性的影响

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摘要

Ni-P coatings exhibit good corrosion resistance; however, they have not been used in applications where high toughness and wear resistance are required. Therefore, to enhance the toughness and wear resistance of Ni-P coatings, superelastic NiTi particles were incorporated within the Ni-P coatings. However, due to the high cost of the superelastic NiTi compared to Ti powder, Ti was co-deposited with Ni-P and subsequently annealed to produce Ni-P-NiTi coating. The fracture toughness and scratch resistance of the coatings were measured by scratch tests. The effects of Ti content and annealing on coatings' microstructure were investigated using XRD and laser confocal microscope. The relationship between the microstructure and the fracture toughness and scratch resistance was also studied. It is found that the formation of superelastic NiTi particles within the annealed Ni-P-Ti coating significantly improves the coating's fracture toughness and scratch resistance. The average grain sizes of Ni and Ni3P decrease with an increase in Ti content and decrease in annealing temperature and time. The reduction in grain size improves both fracture toughness and hardness (or strength), which gives rise to promoted scratch resistance.
机译：Ni-P涂层表现出良好的耐腐蚀性;然而，它们未在需要高韧性和耐磨性的应用中使用。因此，为了提高Ni-P涂层的韧性和耐磨性，将超弹性NITI颗粒掺入Ni-P涂层内。然而，由于与Ti粉末相比，超弹性NITI的高成本，Ti用Ni-P共沉积并随后退火以产生Ni-P-Niti涂层。通过划伤试验测量涂层的断裂韧性和耐刮擦性。用XRD和激光共聚焦显微镜研究了Ti含量和退火对涂层的微观结构的影响。还研究了微观结构与断裂韧性与耐刮擦性之间的关系。结果发现，在退火的Ni-P-Ti涂层内形成超弹性NITI颗粒显着改善了涂层的断裂韧性和耐刮擦性。 Ni和Ni3P的平均晶粒尺寸随着Ti含量的增加和退火温度和时间的降低而降低。晶粒尺寸的降低改善了断裂韧性和硬度（或强度），这导致促进耐刮擦性。

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