Mechanical properties of polymer-derived ceramic composite coatings on steel

✍ Scribed by Jessica D. Torrey; Rajendra K. Bordia

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 678 KB
• Volume: 28
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2007.05.013

✦ Synopsis

Polymer-derived ceramics have shown promise as a novel way to process low-dimensional ceramics such as fibers and coatings. A polymer-derived ceramic composite coating on steel as a barrier to oxidation and carburization has been developed using poly(hydridomethylsiloxane) as the matrix and titanium disilicide as the filler. Processing parameters have been optimized and coatings of ∼18 m thick and a density of 2.57 g/cm 3 have been produced. This paper presents the results of mechanical testing of the coating and the coating-steel interface. The hardness of the coating after pyrolysis to 800 • C was determined to be 4.8 ± 1.0 GPa and the modulus in the range of 49-54 GPa. The tensile strength of the coating was 1.9 GPa and the ultimate shear strength of the interface was found to be 2.35 GPa.