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Study on Atoms Diffusion of Vacuum Fusion Sintering WC-Co Composite Nano-coatings

机译:真空融合烧结烧结WC-CO复合纳米涂层的原子扩散研究

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The WC-Co composite nano-coatings bonded strongly with steel substrate has been made by vacuum fusion sintering (VFS). Diffusion plays a crucial role in VFS processes, of which the atoms diffusion nearby interface is a vital variable which influences the interfacial bond strength. The atoms diffusion during the vacuum fusion sintering (VFS) process was firstly studied by molecular dynamics and by Fick second law of diffusion. The three-dimensional MD model was built, by which the atoms diffusion, atoms migration contrail and the VFS process were simulated. The concentration distribution of some components were measured by the electrical probe, and the microstructure and morphology of VFS nano-coatings were observed and analyzed by SEM, X-ray diffraction meter and micro-hardness instrument. Combined with the experimental results, diffusion coefficient of every element was calculated in diffusion dynamics
机译:通过真空融合烧结(VFS)制成强大地用钢基材粘合的WC-CO复合纳米涂层。 扩散在VFS过程中起着至关重要的作用,其中原子扩散附近的界面是影响界面粘合强度的重要变量。 首先通过分子动力学和菲克第二扩散法研究了在真空融合烧结烧结(VFS)过程中的原子扩散。 模拟了三维MD模型,通过该模型模拟了原子扩散,原子迁移凸轮和VFS过程。 通过电探针测量一些组分的浓度分布,通过SEM,X射线衍射计和微硬度仪器观察和分析VFS纳米涂层的微观结构和形态。 结合实验结果,在扩散动力学中计算了每个元素的扩散系数

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