| Original Articles |
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X-Ray Photoelectron Spectroscopy Study of the Metal/Cermet Interface |
| LU Hua 1;SHEN Dian-Hong 1;XUE Qi-Kun 1;M. Polak 2;N. Froumin 2 |
| Department of Materials Engineering, Ben-Gurion University of the Negev, Israel |
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| Cite this article: |
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LU Hua, SHEN Dian-Hong, XUE Qi-Kun et al 2001 Chin. Phys. Lett. 18 94-96 |
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Abstract Interfacial reactions between aluminium and polycrystalline cermet TiC0.6 were investigated using x-ray photoelectron spectroscopy, Auger electron spectroscopy and x-ray diffraction. It was found that titanium exists in two chemical states. The carbide and oxide of titanium can be detected simultaneously, and the atomic ratio of Ti:C:O is 5:3:2. This suggests that TiC0.6 is a Ti-oxycarbide or oxygenated TiC composite: Ti5C3O2(TiO2+4TiC0.75). When Al is deposited in vacuum on the Ti-oxycarbide surface, the active Al atoms react chemically only with TiO2at room temperature, but not with Tic0.75 in Ti-oxycarbide. The reaction products are Al2O3 and the intermetallic compound Al3Ti. Annealing the Al/TiC0.6 interface at 750°C Al reacts also with TiC0.75 to form a brittle Al4C3 phase.
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| Keywords:
68.35.-p
79.60.-i
73.20.-r
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Published: 01 January 2001
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| PACS: |
68.35.-p
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(Solid surfaces and solid-solid interfaces: structure and energetics)
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79.60.-i
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(Photoemission and photoelectron spectra)
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73.20.-r
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(Electron states at surfaces and interfaces)
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