超硬AlMgB14薄涂层的结构和摩擦性能
Dmitrii Tkachev1, Ilya Zhukov1, Pavel Nikitin1
1Laboratory of Metallurgy Nanotechnologies, National Research Tomsk State University, Lenin Avenue 36, 634050 Tomsk, Russia.
Nanomaterials (Basel, Switzerland)
|May 27, 2023
概括
射频等离子喷射在WC-Co合金上产生了AlMgB14陶涂层. 最佳偏向电压提高了硬度,显著减少了摩擦和磨损,改善了基于WC的硬合金性能.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 部落学 (tribology) 是一个学科.
背景情况:
- 碳化- (WC-Co) 硬合金广泛使用,但受高摩擦和磨损影响.
- 开发先进的陶涂层对于提高WC-Co基板的性能至关重要.
- 酸 (AlMgB14) 显示出作为一种高性能涂料材料的前景.
研究的目的:
- 研究基于AlMgB14的陶涂料的结构,相位组成和机械性能.
- 为了确定喷雾模式,特别是偏向电压对涂层特性的影响.
- 评估这些涂料在WC-Co硬合金基板上的tribological性能.
主要方法:
- 使用射频 (RF) 等离子喷雾来沉积基于AlMgB14的涂层.
- 进行了微结构分析,以研究涂层形态.
- 构成和结构特征利用能量分散X射线光谱 (EDS),X射线衍射 (XRD) 和拉曼光谱.
- 测量了纳米硬度,摩擦系数 (COF) 和耐磨性.
主要成果:
- 偏差电压显著影响了涂层形态.
- 涂层由无形的Al,Mg,B和O矩阵中的纳米晶体B12电组成.
- 纳米硬度在24GPa至37GPa之间.
- 最佳涂层 (100V偏差) 的COF为0.12和磨损率为7.5 × 10^-5 mm3/N·m.
- 与赤裸的WC-Co基板 (0.31) 相比,COF减少了两倍以上.
结论:
- 通过射频等离子喷射沉积的AlMgB14基涂层有效地增强了WC-Co硬合金的性能.
- 优化偏移电压对于实现优越的硬度和 Tribological 性能至关重要.
- 这些涂层可显著降低摩擦和磨损,证明了它们对苛刻应用的潜力.
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