目的 提高磷酸盐粘结涂层的耐磨损性能。方法 以3-氨基丙基三乙氧基硅烷为纽带，制备氧化石墨烯-二氧化钛复合材料(GO-TiO2)，并作为增强相加入涂层中。通过SEM和FTIR，对GO-TiO2的微观结构和官能团进行表征，采用维氏硬度计对涂层显微硬度进行测量，利用摩擦磨损试验机测试涂层的摩擦学行为，采用白光干涉仪和SEM对涂层磨痕微观结构进行表征。结果 二氧化钛和氧化石墨烯通过化学键连接在一起，且由于二氧化钛的存在，氧化石墨烯表面变得粗糙，从而加强机械啮合作用，提高了涂层其他组分与氧化石墨烯的界面结合力。随着GO-TiO2的加入，涂层的显微硬度增加。未添加GO-TiO2涂层的显微硬度为207.4HV0.3，添加1.0%(质量分数)GO-TiO2时，涂层的显微硬度增加至260.4 HV0.3。涂层的摩擦因数随着GO-TiO2的加入稍微降低，而涂层的耐磨损性能显著增加。未添加GO-TiO2涂层的摩擦因数为0.51左右，磨损率为2.17′10^–4 mm³/(N.m)，当添加1.0% GO-TiO2时，涂层摩擦因数和磨损率分别降低至0.45和0.51′10^–4 mm³/(N.m)。结论 涂层磨损主要是由脆性剥落引起的，而且GO-TiO2的添加并未改变涂层磨损机制。GO-TiO2通过抑制裂纹的拓展，提高了涂层的耐磨损性能。

To improve the wear resistance of phosphate bonded coating, graphene oxide-titanium dioxide (GO-TiO2) was prepared with 3-Aminopropyltriethoxysilane as bridge and added into phosphate bonded coating as the reinforcement. SEM and FTIR was used to study the microstructure and phase of GO-TiO2. In addition, the hardness and triboligical behavior were tested with Vickers hardness tester and a tribometer, respectively. Besides, the microstructure of worn surface was studied by SEM and white light interferometer. The results show that TiO2 is grafted to GO through chemical bonds. Besides, the surface of GO becomes rough with the presence of TiO2, which can strengthen mechanical joggle and improve the interfacial adhesive between GO and the coating matrix. The hardness of the coating is improved with the introduction of GO-TiO2. The hardness of the coating without GO-TiO2 is 207.4 HV0.3, while the hardess reaches to 260.4 HV0.3 with the introduction of 1.0% GO-TiO2. In addition, the friction coefficient slightly decreases with GO-TiO2. However, the wear resistance of the coating is obviously increase. The friction coefficient and wear rate of the coating without GO-TiO2 are 0.51 and 2.17′10–4 mm3/(N.m), respectively. When added 1.0% GO-TiO2, the friction coefficient and wear rate decrease to 0.45 and 0.51′10–4 mm3/(N.m), respectively. The wear is mainly attributed to brittle delamination, and the wear resistance of coating is improved because cracks propagation is inhibited by GO-TiO2.