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通过冷喷涂技术在350、450和550℃条件下将机械混合的Ti/Al粉末进行沉积获得3种Ti/Al涂层,通过扫描电子显微镜、X射线衍射表征Ti/Al涂层的微观组织形貌和物相结构,采用显微硬度计测量涂层硬度值,并对涂层的耐磨粒磨损性能进行研究。结果表明,3种涂层组织致密,其中以550℃喷涂温度条件下所制备涂层孔隙率最低(0.98%),且Ti颗粒不均匀地分布在变形的Al相中;冷喷后3种涂层物相与粉末相同,仍为Ti和Al两相;3种Ti/Al涂层的硬度值分别为(81.58±17.42)HV0.3,(82.4±28.15)HV0.3和(128.4±36.98)HV0.3。3种Ti/Al涂层的磨损机制为犁沟切削形式,其中以喷涂温度为550℃所制备的涂层磨损失量最小(13.93±1.21)mg。
Three Ti / Al coatings were deposited by mechanical spraying of Ti / Al powders at 350, 450 and 550 ℃ by cold spray technique. The microstructure of Ti / Al coatings was characterized by X-ray diffraction (XRD) Appearance and phase structure, the hardness of the coating was measured by microhardness tester, and the abrasion resistance of the coating was studied. The results showed that the three coatings were dense with the lowest porosity (0.98%) at 550 ℃, and the Ti particles were unevenly distributed in the deformed Al phase. After cold spraying, the three coatings The hardness of the three Ti / Al coatings were (81.58 ± 17.42) HV0.3, (82.4 ± 28.15) HV0.3 and (128.4 ± 36.98) HV0.3, respectively. HV0.3.3 kinds of Ti / Al coating wear mechanism for the furrow cutting form, in which the spray temperature of 550 ℃ prepared coating wear loss minimum (13.93 ± 1.21) mg.