Metallographic examination is a critical step in the assessment of thermal spray coating characteristics. This article discusses the major steps involved in metallographic examination: sectioning, mounting, grinding, polishing, optical microscopy, and image analysis. It provides a discussion on etching to reveal grain structure. The article also provides recommendations for metallographic examination of some standard coatings.
Walter Riggs, Dana Rucker, Metallography and Image Analysis, Thermal Spray Technology, Vol 5A, ASM Handbook, Edited By Robert C. Tucker, Jr., ASM International, 2013, p 188–213, https://doi.org/10.31399/asm.hb.v05a.a0005729
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