tailieunhanh - New Tribological Ways Part 2

Tham khảo tài liệu 'new tribological ways part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Study of CrAlN Multilayred Thin Films 19 To study the influence of the operational parameters on the removed matter quantity after each tribological test the voluminal fraction is represented according to the applied normal load Fn fig. 13-b . The found results show that the beneficial effect of films to resist wear is detected for applied loads Fn 5N high this value one brings closer more and more the tribological behavior of the two antagonists in contact alumine substrat from where the beneficial effect of films is detected for the weak applied loads. 4. Conclusion We synthesized coatings having a composition report of N Cr close to 1 with a dual magnetron for 20 of nitrogen in plasma. These coatings are well crystallized. Analyses XPS and SIMS showed that the multi-layer coatings carried out by pulverization magnetron present quite clear interfaces between the mono-layers and who do not present interdiffusion substrate-coating. A good homogeneity of the layers on all their depth was highlighted. In addition the oxygen contamination of the multi-layer coatings is minimal less than 5 at in volume on a few ten nanometer of depth. The analyses by x-rays diffraction highlighted the strong texture of the multi-layer deposits CrN CrAlN and Cr CrN CrAlN which is the consequence of the high residual stresses in the mono-layers. These constraints are decreased in the multi-layers under the effect of the interfaces presented in film. Moreover the thermal properties of multi-layer are refined under the presence of the surface layer CrAlN which plays the role of a thermal barrier. In addition all the multi-layers developed in this work have a good adherence with steel 42CrMo4 and adhesion is better in the case of presence of an underlayer Cr PT in film. 5. References 1 . Jehn . Baumggartner Surf. Coat. Technol. 108 54-55 1992 2 M. Panjan S. Sturm P. Panjan M. Cekada Surf. Coat. Technol. 202 815-819 2007 3 . Dobrzahski M. Polok M. Adamiak Journal of Materials .