研究了TC4钛合金阳极氧化及与PTFE制备的复合涂膜的耐摩擦磨损性能,结果表明,采用恒电位阳极氧化法,在H2SO4电解液体系中影响TC4钛合金氧化多孔膜孔径尺寸、均匀性及膜厚的主要因素是H2SO4浓度、氧化电压和温度;时间对膜孔影响较小,氧化到一定时间后膜厚不再增大;当H2SO4浓度为0.5~0.8 mol/L、电压120~130 V、温度-5~5℃条件下,氧化120 min,膜厚约为12μm,孔径约150~400 nm,膜孔分布均匀;试验结果表明,钛合金阳极氧化-PTFE复合涂层摩擦系数约为0.22,而TC4钛合金基体摩擦系数约为0.44,比钛合金基体降低了约50%,磨损量比TC4钛合金基体降低约70%,显著提高了自润滑减摩、耐磨性能.
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