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.

Ni-P涂层具有良好的耐腐蚀性；但是，它们尚未用于需要高韧性和耐磨性的应用中。因此，为了增强Ni-P涂层的韧性和耐磨性，将超弹性NiTi颗粒掺入到Ni-P涂层中。然而，由于与Ti粉末相比，超弹性NiTi的成本较高，因此将Ti与Ni-P共沉积，然后进行退火以生产Ni-P-NiTi涂层。涂层的断裂韧性和耐刮擦性通过刮擦测试来测量。利用XRD和激光共聚焦显微镜研究了Ti含量和退火对涂层组织的影响。还研究了显微组织与断裂韧性和耐划伤性之间的关系。发现在退火的Ni-P-Ti涂层内形成超弹性NiTi颗粒可显着改善涂层的断裂韧性和耐划伤性。Ni和Ni的平均晶粒尺寸₃ P随着Ti含量的增加以及退火温度和时间的减少而降低。晶粒尺寸的减小同时改善了断裂韧性和硬度（或强度），从而提高了耐刮擦性。