ABSTRACT Electrolytic codeposition is a promising alternative low-cost process for fabricating MCrAlY coatings. In this process, CrAlY particles are codeposited with the (Ni,Co) to form an (Ni,Co)-CrAlY composite coating, which is subsequently heat treated at elevated temperatures to be transformed to the MCrAlY coating containing phases of β-NiAl, γ-(Ni,Co), etc. A permeable rotating barrel was utilized in the present electro-codeposition process, which offered the benefit to apply uniform coatings on the entire sample surface. Such codeposition configuration allowed exchange of electrolyte between the barrel and the plating tank while keeping the specimen and powder inside the barrel. Two types of CrAlY-based particles (made by ball milling and gas atomization) were employed. The effects of several key processing parameters, such as current density, particle loading, and barrel rotational speed, on the CrAlY(Ta) particle incorporation in the electrodeposited Ni-CrAlY(Ta) coatings were studied. The influence of particle geometry/shape was also investigated. Higher CrAlY particle incorporation was observed for the spherical gas-atomized particles than the ball-milled particles with irregular shapes.

中文翻译：

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电共沉积参数对 Ni-CrAlY(Ta) 涂层中颗粒掺入的影响

摘要 电解共沉积是一种有前途的替代低成本制造 MCrAlY 涂层的工艺。在此过程中，CrAlY 颗粒与 (Ni,Co) 共沉积形成 (Ni,Co)-CrAlY 复合涂层，随后在高温下进行热处理，转变为含有 β-NiAl 相的 MCrAlY 涂层， γ-(Ni,Co) 等。在目前的电共沉积过程中使用了一个可渗透的旋转桶，这提供了在整个样品表面施加均匀涂层的好处。这种共沉积配置允许在桶和电镀槽之间交换电解液，同时将样品和粉末保持在桶内。采用两种类型的 CrAlY 基颗粒（通过球磨和气体雾化制成）。几个关键加工参数的影响，研究了电沉积 Ni-CrAlY(Ta) 涂层中 CrAlY(Ta) 颗粒掺入的电流密度、颗粒负载和机筒转速等因素。还研究了颗粒几何形状/形状的影响。观察到球形气体雾化颗粒比具有不规则形状的球磨颗粒具有更高的 CrAlY 颗粒掺入量。