Multilayered (Ti, Al) ceramic coating for high-speed machining applications

Citation
Xt. Zeng et al., Multilayered (Ti, Al) ceramic coating for high-speed machining applications, J VAC SCI A, 19(4), 2001, pp. 1919-1922
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
ISSN journal
0734-2101 → ACNP
Volume
19
Issue
4
Year of publication
2001
Part
2
Pages
1919 - 1922
Database
ISI
SICI code
0734-2101(200107/08)19:4<1919:M(ACCF>2.0.ZU;2-M
Abstract
A multilayered (Ti, Al) ceramic hard coating was deposited on tunsten-carbi de ball-nose end mills for high-speed machining using an unbalanced magnetr on- sputtering system. The process parameter dependence of the coating prop erties was studied. X-ray diffractometry, x-ray photoelectron spectroscopy, nanoindentation. and scratch tests were used to characterize the structura l, compositional. and mechanical properties of the coatings. High hardness, up to 40 GPa; good adhesion strength, up to 100 N in scratch critical load ; and high-oxidation resistance were achieved, leading to excellent perform ance in high-speed milling on hardened tool steel at a speed of 260 in min( -1). The results show that the tool life with this coating is improved by a factor of 4 or better under the testing conditions used compared to the un coated tools. The surface finish of the machined steel achieved with this c oating is also significantly better. (C) 2001 American Vacuum Society.