Matthews, Coatings Tribology, Elsevier, Amsterdam, 1998 Troczynski, Correlations Between Microstructural Parameters, Micromechanical Properties and Wear Resistance of Plasma Sprayed Ceramic Coatings, Wear, 2001, 250, p 569–575 John, Nanocomposites with Unique Properties and Applications in Medicine and Industry, InTech, Croatia, 2011 Savenko, Thin TaC Layer Produced by Ion Mixing, Surf. Fahrenholtz, Densification and Mechanical Properties of TaC-Based Ceramics, Mater.
Vickrs photoplan mode norm crack#
The fracture toughness of TaC ceramic layer is 6.63 ± 0.34 MPa m 1/2, and the toughening mechanism is mainly crack deflection. Indentation fracture toughness calculated by the indentation method is independent of the indentation load on the specimen. The critical indentation load for Vickers crack initiation in TaC ceramic layer lies between 1 and 2 N and the cracks show typical intergranular fracture characteristics.
The results reveal that K IC evaluation of TaC ceramic layer by the Vickers indentation method strongly depends on the selection of crack system and K IC equations. A Niihara approach was chosen to assess the fracture toughness of TaC ceramic layer under condition of the Palmqvist mode in the experiment. Indentation fracture toughness in TaC ceramic layer was determined by the Vickers indentation test for various loads. A tantalum carbide (TaC) ceramic layer was produced on gray cast iron matrix by in situ technique comprising a casting process and a subsequent heat treatment at 1135 ☌ for 45 min.
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