X-Ray Photoelectron Spectroscopy Study of the Metal/Cermet Interface

• 来源期刊: 中国物理快报(英文版)
• 学科: 物理学
• 年，卷（期）: 2001,（1）
• 页码范围: 94-96
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

Interfacial reactions between aluminium and polycrystalline cermet TiCo.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 TiCo.6 is a Ti-oxycarbide or oxygenated TiC composite: Ti5C3O2 (TiO2＋4TiCo. 75). When Al is deposited in vacuum on the Ti-oxycarbide surface, the active Al atoms react chemically only with TiO2 at room temperature, but not with Tico.75 in Ti-oxycarbide. The reaction products are Al2O3 and theintermetallic compound Als Ti. Annealing the Al/TiCo.6 interface at 750℃ , Al reacts also with TiCo.75 to form a brittle Al4C3 phase.