Alternative TitlePreparation and Properties of Alumina Ceramic Film on Ti-alloy Surface
姜冬雪1; 付颖3; 张峻巍1; 张伟2; 辛丽2; 朱圣龙2; 王福会5
Source Publication中国腐蚀与防护学报
Abstract采用多弧离子镀技术在TC4钛合金表面制备了厚度约40μm的纯Al层,然后在恒流模式下对其进行不同时间的微弧氧化处理,以获得耐磨的Al2O3陶瓷膜。采用扫描电镜、X射线衍射仪、显微硬度计、摩擦磨损试验机和拉伸试验机对钛合金镀铝层微弧氧化膜的微观组织结构、显微硬度、耐磨性和结合力进行了观察和测量。结果表明:微弧氧化陶瓷层主要由γ-Al2O3和α-Al2O3以及少量的非晶相SiO2组成,膜层均匀、致密。随着微弧氧化时间的延长,Al2O3陶瓷层厚度增加,镀铝层厚度减小。微弧氧化3 h时,Al2O3膜致密层硬度达到1261 HV。氧化4 h,Al2O3陶瓷层厚达60~70μm,镀铝层几乎全部氧化,钛合金基材亦发生轻微氧化;但是,基体钛合金的氧化反而导致Al2O3膜层内形成贯穿裂纹等缺陷,膜层硬度下降,膜层与钛合金基材的结合强度降低。Al2O3陶瓷膜的摩擦系数较钛合金基材的有所降低,磨损量明显降低。Al2O3陶瓷膜/镀铝层/钛合金体系结合强度大于40 MPa,最高可达68 MPa。
Other AbstractThe application of Ti-alloys is restricted to its low hardness and poor wear resistance. In this paper, a pure Al-fim of 40 μm in thickness was deposited on the surface of TC4 Ti-alloy by multi-arc ion plating, and then micro-arc oxidation(MAO) in constant current mode was carried out to obtain wearresistant ceramic films. The microstructure, microhardness, wear resistance and bonding strength of MAO films were characterized by mean of SEM, XRD, micro hardness tester etc. The results show that the ceramic film is mainly composed of γ-Al2O3, α-Al2O3 and a small amount of amorphous SiO2, and the film is uniform and compact. With the increase of the MAO time, the thickness of alumina ceramic film increases. The hardness of the dense portion of MAO coating is 1261 HV after micro-arc oxidation for 3 h.For the case of micro-arc oxidation for 4 h, the thickness of the generated alumina ceramic film is 60~70 μm, while almost the entire pre-deposited Al-film is oxidized, and the substrate Ti-alloy is slightly oxidized. At the same time, some penetration cracks in the oxide film was found, therefore, the hardness of the film and the bonding strength between the film and substrate all decrease. The friction coefficient of MAO ceramic film is lower than that of Ti-alloy substrate, and the wear rate is also obviously reduced. In sum, the bonding strength of MAO ceramic films with the substrate is higher than 40 MPa, whereas, the maximum bonding strength can reach 68 MPa.
Keyword钛合金 离子镀铝 微弧氧化 微观结构 耐磨性 结合强度
Indexed ByCSCD
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Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
姜冬雪,付颖,张峻巍,等. 钛合金表面Al2O3陶瓷膜制备及性能研究[J]. 中国腐蚀与防护学报,2019,39.0(006):469-476.
APA 姜冬雪.,付颖.,张峻巍.,张伟.,辛丽.,...&王福会.(2019).钛合金表面Al2O3陶瓷膜制备及性能研究.中国腐蚀与防护学报,39.0(006),469-476.
MLA 姜冬雪,et al."钛合金表面Al2O3陶瓷膜制备及性能研究".中国腐蚀与防护学报 39.0.006(2019):469-476.
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