Cubic boron nitride coatings are under development for a variety of applications but stabilization of the pure CBN form and adhesion of films deposited by PVD and ion-based methods have been difficult. An alternate two-stage process comprising of ESC (electrostatic spray coating) and CVI (chemical vapor infiltration) has been developed for depositing CBN-TiN composite coatings for wear related applications. The process optimization yields fully dense films of CBN particles evenly dispersed in a continuous TiN matrix. Metal cutting tests (turning–4340 steel), using CBN-TiN composite coating thus developed, have shown an increase in tool life of three to seven times, depending on machining parameters, in comparison with CVD deposited TiN films.
CBN-TiN Composite Coating Using a Novel Combinatorial Method—Structure and Performance in Metal Cutting
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received September 2001; Revised October 2002. Associate Editor: S. Kapoor.
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Russell, W. C., Malshe, A. P., Yedave , S. N., and Brown, W. D. (July 23, 2003). "CBN-TiN Composite Coating Using a Novel Combinatorial Method—Structure and Performance in Metal Cutting ." ASME. J. Manuf. Sci. Eng. August 2003; 125(3): 431–435. https://doi.org/10.1115/1.1581886
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