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| Abstract No.: |
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| Title: |
Characterization of CrMoBW- Fe base in-flight particles and splats fabricated by nano-structured cored wire arc spraying
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| Authors: |
MAN Tuiprae* / Rajamangala University of Technology, Thailand
Kiattisak Meekhanthong/ Advanced Surface Technology Company, Thailand
Sittichai Wirojanupatump/ Chiang Mai University, Thailand
Komsanti Chokethawai/ Chiang Mai University,
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| Abstract: |
Properties and performance of the coating fabricated by wire arc spray process strongly depend on various factors including spray parameters and characteristics of both in-flight particle and splat. In this study, relationship between in-flight particle, splat formation and microstructure of the CrMoBW-Fe based nano-structure coating fabricated by wire arc spray process were investigated. The Focus ion beam (FIB) milling was used to prepare a transversal cross-section of the in-flight particle and splat to be characterized by scanning electron microscopy (SEM) along with an energy dispersive x-ray spectroscopy (SEM-EDS). In addition, phase compositions were also analyzed by using x-ray diffractometer (XRD). The results revealed that size of the in-flight particles and splat morphology greatly influenced microstructure and properties of the coatings. In-flight particles were revealed a spherical-shape with a broad size distribution ranging from 0.8 to 115 um at the average of 26 um particle diameter. In-flight particles were well flattened on impact giving flower-shape splat with the average diameter of 100 um. Flattening degree was found to be 3.8. Arc sprayed CrMoBW-Fe base nano-structure coating showed very thin splat with fine lamella structure which implied that particles were fully molten upon impact onto substrate.
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