The high pressure-high velocity oxy liquid fuel (HP-HVOLF) is a current industry-adopted thermal spraying technique for developing high melting point powder coating over surfaces. In the current manuscript, the rare earth (La2O3/CeO2/Er2O3–0.3 wt%. each) doped and without rare earth doped carbide (WC-10Co-4Cr) coatings have been deployed on stainless steel (SS410) via HP-HVOLF process. The comparison among the properties of the substrate, without rare earth coating and rare earth oxides doped coatings have been characterized by conducting mechanical, microstructural, and slurry jet erosion analysis. The results show that the hardness, modulus of elasticity, and flexural strength of the cermet coating are considerably higher for rare earth-doped coatings than those without rare earth-doped coatings and substrates (SS410). The EDX (energy dispersive X-ray spectroscopy) has recognized the occurrence of different elements on the surface together with rare earth. Moreover, its compounds such as Co3W3C and W2C were inveterate using X-ray diffraction (XRD) measurements. The porosity level of the rare earth doped, and un-doped coatings are obtained to be less than 1 % and≥1 to ≤2 % respectively. Moreover, the rare earth-doped cermet coated surface shows hydrophobic behavior with a maximum water contact angle (WCA) of ≈129.4°. Furthermore, the slurry jet behavior of rare earth doped coating shows high wear resistance as compared to without RE doped coatings, indicating its potential for robust performance under erosive conditions.

中文翻译：

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稀土掺杂陶瓷涂层：使用高压高速氧液燃料沉积分析微观结构、机械性能和浆料抗侵蚀性


高压高速氧液体燃料 （HP-HVOLF） 是当前行业采用的一种热喷涂技术，用于在表面开发高熔点粉末涂料。在目前的手稿中，稀土（La2O3/CeO2/Er2O3–0.3 wt%）掺杂和无稀土掺杂碳化物 （WC-10Co-4Cr） 涂层已通过 HP-HVOLF 工艺部署在不锈钢 （SS410） 上。通过进行机械、微观结构和浆料射流侵蚀分析，对无稀土涂层和稀土氧化物掺杂涂层的基材性能进行了比较。结果表明，稀土掺杂涂层的金属陶瓷涂层的硬度、弹性模量和弯曲强度明显高于没有稀土掺杂涂层和基材的金属陶瓷涂层 （SS410）。EDX（能量色散 X 射线光谱法）已经识别出与稀土一起在表面上存在不同的元素。此外，其化合物如 Co3W3C 和 W2C 是使用 X 射线衍射 （XRD） 测量进行根深蒂固的。掺杂稀土和未掺杂涂层的孔隙率分别小于 1 % 和 ≥1 至 ≤2 %。此外，稀土掺杂金属陶瓷涂层表面表现出疏水行为，最大水接触角 （WCA） 为 ≈129.4°。此外，与没有 RE 掺杂涂层相比，稀土掺杂涂层的浆料喷射行为表现出高耐磨性，表明其在侵蚀条件下具有强大的性能潜力。