Microhardness and toughness of the TiN coating prepared by reactive plasma spraying

The in-situ titanium nitride (TiN) coating with a great thickness was reactive plasma sprayed in a nitrogen-containing environment. The microhardness of the coating was measured, and the indentations were used to determine the fracture toughness of the coating. The toughening mechanism was character...

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Veröffentlicht in:	Applied surface science 2005-04, Vol.243 (1), p.204-213
Hauptverfasser:	Feng, Wenran, Yan, Dianran, He, Jining, Zhang, Guling, Chen, Guangliang, Gu, Weichao, Yang, Size
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Fracture toughness Materials science Mechanical and acoustical properties adhesion Methods of deposition of films and coatings film growth and epitaxy Physics Reactive plasma spraying Solid surfaces and solid-solid interfaces Spray coating techniques Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) TiN coating
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Beschreibung
Zusammenfassung:	The in-situ titanium nitride (TiN) coating with a great thickness was reactive plasma sprayed in a nitrogen-containing environment. The microhardness of the coating was measured, and the indentations were used to determine the fracture toughness of the coating. The toughening mechanism was characterized by analyzing the SEM morphologies of TiN coating's fracture surfaces. Results show that the coating possesses a high hardness and toughness. The average hardness of the coating is 1200 H V 100 g ; and the fracture toughness ( K IC) of it is 4.51 MPa·m 0.5. The cross-section of the TiN coating shows an obvious phenomenon of indentation size effect (ISE). The toughening mechanisms of the coating are crack deflection and pores, etc.
ISSN:	0169-4332 1873-5584
DOI:	10.1016/j.apsusc.2004.09.064