周志强,郝娇山,宋文文,孙德恩,李黎,蒋永兵,张健.钛合金表面等离子喷涂Al2O3-40%TiO2陶瓷涂层的高温摩擦磨损性能[J].表面技术,2023,52(12):351-359, 368.
ZHOU Zhi-qiang,HAO Jiao-shan,SONG Wen-wen,SUN De-en,LI Li,JIANG Yong-bing,ZHANG Jian.High Temperature Tribological and Wear Properties of Plasma Sprayed Al2O3-40%TiO2 Ceramic Coating on Titanium Alloy[J].Surface Technology,2023,52(12):351-359, 368 |
| 钛合金表面等离子喷涂Al2O3-40%TiO2陶瓷涂层的高温摩擦磨损性能 |
| High Temperature Tribological and Wear Properties of Plasma Sprayed Al2O3-40%TiO2 Ceramic Coating on Titanium Alloy |
| 投稿时间：2022-10-17 修订日期：2023-05-17 |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.12.029 |
| 中文关键词: 钛合金表面 等离子喷涂 Al2O3-40%TiO2涂层 高温摩擦磨损 |
| 英文关键词:titanium alloy surface plasma spraying Al2O3-40%TiO2 coating high temperature friction and wear |
| 基金项目:国家重点研发计划项目(2018YFB2004100) |
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| Author | Institution |
| ZHOU Zhi-qiang | Chongqing Chuanyi Control Valve Co., Ltd., Chongqing 400707, China |
| HAO Jiao-shan | Chongqing Chuanyi Control Valve Co., Ltd., Chongqing 400707, China |
| SONG Wen-wen | Chongqing Chuanyi Control Valve Co., Ltd., Chongqing 400707, China |
| SUN De-en | School of Materials and Energy, Southwest University, Chongqing 400715, China |
| LI Li | Chongqing Chuanyi Control Valve Co., Ltd., Chongqing 400707, China |
| JIANG Yong-bing | Chongqing Chuanyi Control Valve Co., Ltd., Chongqing 400707, China |
| ZHANG Jian | Chongqing Chuanyi Control Valve Co., Ltd., Chongqing 400707, China |
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| 中文摘要: |
| 目的 研究温度对钛合金表面Al2O3-40%TiO2陶瓷涂层摩擦磨损性能的影响，探讨涂层在高温下的摩擦磨损机理。方法 采用大气等离子喷涂技术(APS)在TC4钛合金表面制备Al2O3-40%TiO2(AT40)陶瓷涂层。采用扫描电子显微镜(SEM)和能量分散谱仪(EDS)，对AT40陶瓷涂层中的微观形貌和物相进行定性分析。借助维氏显微硬度计，研究 AT40陶瓷涂层在常温下的截面显微硬度分布规律，以及高温下的显微硬度。采用多功能摩擦磨损试验机，测试AT40陶瓷涂层在200、350、500 ℃下的摩擦磨损性能，并进行原位在线自动3D形貌表征。结果 AT40陶瓷涂层呈典型的热喷涂层状结构，各相分布均匀，涂层结构致密，平均显微硬度相较于TC4钛合金基材提高了81%。AT40陶瓷涂层在200、350、500 ℃下的高温硬度分别为513HV0.3、463HV0.3、448HV0.3。在200、350 ℃时，AT40陶瓷涂层的平均摩擦系数分别为0.18±0.02和0.38±0.03，磨损率分别为(7.8±0.01)×10–5 mm3/(N.m)和(37.2±0.01)×10–5 mm3/(N.m)，涂层具有优异的抗高温摩擦磨损性能。500 ℃时，涂层的平均摩擦系数和磨损率分别为0.77±0.02和(134.4±0.01)×10–5 mm3/(N.m)，磨痕深度和磨损体积大幅增加，耐磨性能降低。结论 AT40陶瓷涂层在200 ℃和350 ℃的磨损机制主要为微区脆性断裂，在500 ℃时的磨损机制表现为裂纹扩展引起的分层剥落和轻微磨料磨损。 |
| 英文摘要: |
| Atmospheric plasma spraying (APS) is an advanced surface modification technology, which can improve surface properties of titanium alloy without changing the substrate material, such as wear resistance, corrosion resistance, oxidation resistance and other properties. Many researchers have studied the abrasion resistance and corrosion resistance of Al2O3-13%TiO2 coating prepared by APS on titanium alloy at room temperature. However, temperature has an important effect on the performance of oxide ceramic coatings and related researches are rarely reported. The work aims to study the effect of temperature on the friction and wear properties of Al2O3-40%TiO2 (AT40) ceramic coating and explore the friction and wear mechanism of the coating at high temperature. Commercially available HasC-276(NiMo16Cr15Fe6W4, wt.%) powders and Al2O3-40%TiO2 (wt.%) with a nominal particle size distribution of –45-+15 μm and –35-+5 μm were prepared as spray powder, respectively. Plain TC4 (Ti-6Al-4V, wt.%) titanium alloy plates (30 mm×15 mm×8 mm) were used as substrate materials. Prior to APS spraying, the substrates were sand blasted with corundum grit (50~70 mesh) in order to improve the bonding strength between coating and substrate. The coatings were deposited by atmospheric spraying equipment (PRAXAIR 3710M, America) manipulated with a robot (ABB, Sweden). The plasma deposition process was carried out with optimal process parameters. The HasC-276 layer acted as bonder coating in order to reduce the difference in mechanical properties between TC4 substrate and ceramic coating, which reduced the crack sensitivity and improved the adhesion. The spray thickness of HasC-276 layer and AT40 coating was about 100 µm and 250-300 µm, respectively. AT40 coating samples were cut with wire cutting and the cross section and surface were polished to a smooth surface with Ra of (0.15±0.02) μm. The friction and wear properties of AT40 ceramic coating were tested on a multi-function friction wear tester (MFT-5000, China) at 200 ℃, 350 ℃and 500 ℃ and as well as the in-situ online automatic 3D morphology characterization. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to qualitatively analyze the micro morphology and phase of AT40 ceramic coating. The section micro-hardness distribution of AT40 ceramic coating at room temperature and at high temperature was studied with the Vickers micro-hardness tester. The results show that the AT40 ceramic coating presents a typical thermal spraying layered structure, with uniform distribution of all phases and dense coating structure. The average micro-hardness is 81% higher than that of the TC4 titanium alloy substrate. The high temperature hardness of AT40 ceramic coating at 200, 350 and 500 ℃ is 513, 463 and 448HV0.3 respectively. At 200 ℃ and 350 ℃, the average friction coefficient of AT40 ceramic coating is 0.18±0.02 and 0.38±0.03 respectively, and the wear rate is (7.8±0.01)×10–5 mm3/(N.m) and (37.2±0.01)×10–5 mm3/(N.m) respectively and the coating shows excellent high temperature friction and wear resistance. At 500 ℃, the average friction coefficient and wear rate of the coating are 0.77±0.02 and (134.4±0.01)×10–5mm3/(N.m) respectively, the wear scar depth and wear volume increase significantly, and the wear resistance decreases. A few small holes and micro-cracks are observed on the surface morphology of AT40 as-sprayed coating, which acts as initial-cracking. During the high temperature wear process, the surface of AT40 coating under the action of friction and compressive stress will generate high local stress, which will cause these initial micro-crack to grow and expand along the oxide structure boundary and the holes of the coating and generate longitudinal through cracks, forming micro brittle fracture. The wear mechanism of AT40 ceramic coating is mainly micro brittle fracture at 200 ℃ and 350 ℃. Moreover, with the temperature increasing to 500 ℃, the thermal stress inside the coating is the major factor that promotes the crack propagation. It causes the coating to delaminate and peel off, forming peeling pits and wear debris. These peeled particles remain on the surface of the sample and will be crushed to fine debris. These pulled out debris will act as abrasive particles leading to the three-body abrasive wear. Many wear grooves, micro-cracking, wear debris and pores are obviously observed on the worn surface of the AT40 coating at 500 ℃ indicating that delamination and peeling caused by crack propagation and slight abrasive wear are the main wear mechanism. |
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