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https://hdl.handle.net/1822/27576
Título: | Effect of the microstructure on the cutting performance of superhard (Ti, Si, Al)N nanocomposite films |
Autor(es): | Fernandes, C. Carvalho, S. Rebouta, L. Vaz, F. Denannot, M. F. Pacaud, J. Rivière, J. P. Cavaleiro, A. |
Palavras-chave: | (Ti,Si,Al)N Microstructure HRTEM XRD |
Data: | 2008 |
Editora: | Elsevier |
Revista: | Vacuum |
Resumo(s): | A d.c. reactive magnetron sputtering technique was used to deposit (Ti,Si,Al)N coatings onto WC–Co cutting tools. The microstructure of the coatings was analysed using X-ray diffraction (XRD) and highresolution transmission electron microscopy (HRTEM) measurement. Before the cutting experiments, the XRD results revealed a structure indexed to an fcc TiN. The results obtained by the XRD tests, with detector variation in asymmetric mode (rocking curves) showed a decrease in the quality of the fiber texture in the (111) grains with the change on deposition chamber geometry (two magnetrons in place of four magnetrons). Cross-sectional HRTEM images of the (Ti,Al)N sample showed grains with a diameter between 16 and 30 nm, while for the (Ti,Si,Al)N samples grains with a diameter between 6 and 10 nm were observed. Furthermore, through the visualization of bright field images it was possible to discern a columnar structure. For samples prepared at high deposition rates (2 mm/h), HRTEM micrographs revealed the formation of the multilayer stacking of (Ti,Si)N/(Ti,Al)N. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/27576 |
DOI: | 10.1016/j.vacuum.2008.03.050 |
ISSN: | 0042-207X |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - GRF - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Effect of the microstructure on the cutting performance.pdf | 900,23 kB | Adobe PDF | Ver/Abrir |