中频-直流磁控溅射铝涂层微米压入特性及低温循环性能

发布时间：2018-04-15 03:18

本文选题：中频-直流磁控溅射 + 铝涂层　；参考：《中国表面工程》2017年01期

【摘要】：为预防TC4钛合金紧固件与机身铝合金之间产生电偶腐蚀,采用中频-直流磁控溅射技术在钛合金表面制备铝涂层,利用SEM、EDS进行微观形貌和成分分析,采用拉伸和划痕法评价涂层结合性能,使用微米压痕法研究涂层硬度、压痕蠕变和循环力学行为,并对涂层进行低温循环性能测试。结果表明:涂层的拉伸结合强度为61.75 MPa,划痕结合力为(2.46±0.37)N,70 m N下硬度为(0.348±0.015)GPa。压痕蠕变加载时间由5 s增加到30 s,蠕变位移从87.0 nm减小至49.3 nm,保载时间由5 s增加到30 s,位移从27.8 nm增大到92.9 nm,硬度随加载及保载时间增加均下降,随循环保载时间和循环次数增加均降低。当保温时间从1 h增加到6 h,划痕形貌由耕犁状向切削状转变,边缘剥离程度加大,末端堆积增加;涂层结合力下降,硬度先升高后降低。
[Abstract]:In order to prevent galvanic corrosion between TC4 titanium alloy fastener and fuselage aluminum alloy, aluminum coating was prepared on the surface of titanium alloy by intermediate frequency direct current magnetron sputtering technique.The bonding properties of the coatings were evaluated by tensile and scratch methods. The hardness, creeping and cyclic mechanical behavior of the coatings were studied by micron indentation method. The low temperature cycling properties of the coatings were tested.The results show that the tensile bonding strength of the coating is 61.75 MPa and the scratch adhesion is 2.46 卤0.37NnnnnnnnnngPa. the hardness is 0.348 卤0.015 GPa. the tensile bonding strength of the coating is 61.75 MPa.The creep loading time of indentation increased from 5 s to 30 s, the creep displacement decreased from 87.0 nm to 49.3 nm, the loading time increased from 5 s to 30 s, and the displacement increased from 27.8 nm to 92.9 nm. The hardness decreased with the increase of loading and loading time.With the increase of cycle loading time and cycle times, the cycle time decreased.When the holding time was increased from 1 h to 6 h, the scratch morphology changed from plow shape to cutting shape, the edge peeling degree increased, the end accumulation increased, the adhesion force decreased, the hardness first increased and then decreased.
【作者单位】：中国民航大学中欧航空工程师学院;贵州航天精工股份有限公司;
【基金】：国家自然科学基金(11502285) 中央高校基本科研业务费专项资金(ZXH2011C011)~~
【分类号】：TG174.444

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