中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 Special 3 December 2012 |
（1. National Core Research Center for Hybrid Materials Solution, Pusan National University, Busan 609-735, Korea;
2. School of Materials Science and Engineering, Pusan National University, Busan 6）
Abstract:Ternary Ti-B-N coatings were synthesized on AISI 304 and Si wafer by plasma-enhanced chemical vapor deposition (PECVD) technique using a gaseous mixture of TiCl4, BCl3, H2, N2, and Ar. By virtue of X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscope, and high-resolution transmission electron microscope, the influences of B content on the microstructure and properties of Ti-B-N coatings were investigated systematically. The results indicated that the microstructure and mechanical properties of Ti-B-N coatings largely depend on the transformation from FCC-TiN phase to HCP-TiB2 phase. With increasing B content and decreasing N content in the coatings, the coating microstructure evolves gradually from FCC-TiN/a-BN to HCP-TiB2/a-BN via FCC-TiN+HCP-TiB2/a-BN. The highest microhardness of about 34 GPa is achieved, which corresponds to the nanocomposite Ti-63%B-N (mole fraction) coating consisting of the HCP-TiB2 nano-crystallites and amorphous BN phase. The lowest friction-coefficient was observed for the nanocomposite Ti-41%B-N (mole fraction) coating consisting of the FCC-TiN nanocrystallites and amorphous BN phase.
Key words: Ti?B?N coating; plasma-enhanced chemical vapor deposition (PECVD); nanocomposite coating; hardness; friction coefficient
