Microwave cladding is one of the latest surface engineering techniques, which has been used to improve the surface properties of a material. This technique overcomes almost all limitations of the existing methods. In this study, Ni-based+10% Cr₃C₂ composite clads have been developed in domestic microwave oven of 2.45-GHz frequency and 900-W power. The developed composite clads have been characterized using various standard mechanical and metallurgical techniques like SEM/EDS, XRD and Vickers microhardness tester. Cavitation erosion resistance of developed composite clads has also been examined at different parametric conditions. The microstructure analysis exhibits that the developed composite clads of 730-μm thickness are free of cracks (solidification and interfacial) and less porous. The presence of various intermetallic and hard carbide phases like FeNi₃, CrSi₂, Cr₃Ni₂SiC, SiC and NiC is confirmed from the XRD analysis. The Vickers microhardness study reveals that the average microhardness of clad region is 430±65 HV0.3. The cavitation erosion study (at different parametric conditions using vibratory cavitation erosion testing) reveals that the developed composite clads perform much better under cavitation erosion environment than the SS-316 substrate. The stand-off distance is found to be the most dominating factor followed by amplitude and immersion depth.

中文翻译：

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SS-316 的表面改性以通过复合微波包层提高抗气蚀性

微波熔覆是最新的表面工程技术之一，已被用于改善材料的表面性能。该技术克服了现有方法的几乎所有限制。本研究开发了Ni基+10% Cr ₃ C ₂复合包层，用于家用微波炉，频率为2.45GHz，功率为900W。已使用各种标准机械和冶金技术（如 SEM/EDS、XRD 和维氏显微硬度测试仪）对开发的复合材料包层进行了表征。开发的复合材料包层的抗气蚀性也在不同的参数条件下进行了检查。显微组织分析表明，开发的 730-μm 厚度无裂缝（凝固和界面）且孔隙较少。XRD分析证实了各种金属间化合物和硬质碳化物相如FeNi ₃、CrSi ₂、Cr ₃ Ni ₂ SiC、SiC和NiC的存在。维氏显微硬度研究表明，复合区的平均显微硬度为430±65高压0.3. 气蚀研究（在不同参数条件下使用振动气蚀测试）表明，开发的复合材料包层在气蚀环境下的性能比 SS-316 基材好得多。发现间隔距离是最主要的因素，其次是幅度和浸入深度。