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| 喷射参数对Ni-Co-BN(h)纳米复合镀层结构及耐磨性的影响 |
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李恒征1,2, 康敏1,3, 张银1, 牛晓飞2, 刘从虎2, 金美付1,3
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1.南京农业大学 工学院, 南京 210031;2.宿州学院 机电学院, 安徽 宿州 234000;3.南京农业大学 江苏省智能化农业装备重点实验室, 南京 210031
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| 摘要: |
| 采用喷射电沉积的方法在不同喷射电压和喷射速度参数下制备了Ni-Co-BN（h）纳米复合镀层，并利用扫描电镜、能谱仪、X射线衍射仪、显微硬度计及摩擦磨损仪等分别对镀层的表面形貌、晶相结构、显微硬度和摩擦因数进行了表征和分析。结果表明：Ni-Co-BN（h）纳米复合镀层中各元素分布均匀，除喷射速度为0.5 m/s的样本外，镀层表面无明显纳米颗粒团簇现象；Ni-Co-BN（h）镀层为晶态结构，晶粒细小，Ni（111）和Co（111）为其主要生长面，Ni原子与Co原子间形成了单一的α相固溶体；喷射电压和喷射速度参数对Ni-Co-BN（h）纳米复合镀层的表面形貌、显微硬度和自润滑性能等均有影响，且过低的喷射速度直接影响到镀层的使用寿命；当喷射电压为18 V，喷射速度为1.5 m/s时，Ni-Co-BN（h）纳米复合镀层的硬度最高，摩擦因数最低，镀层表现出较好的减摩和自润滑性能。 |
| 关键词: Ni-Co-BN(h)纳米复合镀层 喷射电沉积 显微结构 显微硬度 耐磨性 |
| DOI：10.11933/j.issn.1007-9289.20170903003 |
| 分类号:TG174.442 |
| 基金项目:安徽省高校自然科学研究重点项目（KJ2017A438）；安徽省教育厅自然科学项目（KJ2016A775） |
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| Influences of Jet Parameters on Structure and Wear Resistance of Ni-Co-BN(h) Nanocomposite Coatings |
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LI Heng-zheng1,2, KANG Min1,3, ZHANG Yin1, NIU Xiao-fei2, LIU Cong-hu2, JIN Mei-fu1,3
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1.College of Engineering, Nanjing Agricultural University, Nanjing 210031;2.College of Mechanical and Electrical Engineering, Suzhou University, Suzhou 234000, Anhui;3.Jiangsu Key Laboratory for Intelligent Agricultural Equipment, Nanjing Agricultural University, Nanjing 210031
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| Abstract: |
| Ni-Co-BN(h) nanocomposite coatings were fabricated by jet electrodeposition at different jet voltages and speeds. The surface morphology, crystal structure, microhardness and friction coefficient of the coatings were investigated and analyzed by SEM, EDS, XRD, a microhardness tester and a friction abrasion tester, respectively. The results show that each element in the Ni-Co-BN(h) nanocomposite coatings is distributed uniformly. Except for the sample fabricated at 0.5 m/s, there is no serious nanoparticles cluster phenomena on the coatings surface. The new coatings are crystalline structures with a finer grain size. Ni (111) and Co (111) are the main growth plate and a single phase (α) solid solution is transformed between Ni and Co. The parameters of jet voltage and speed both have influence on the surface morphology, microhardness and self-lubricating properties of Ni-Co-BN(h) nanocomposite coatings. If the jet speed is too low, the service life of the coatings will be reduced signiticantly. When the parameters are at 1.5 m/s and 18 V, the Ni-Co-BN(h) nanocomposite coatings have the highest microhardness, the lowest friction coefficient and better self-lubricating properties. |
| Key words: Ni-Co-BN(h) nanocomposite coating jet electrodeposition microstructure microhardness wear resistance |