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将双层辉光离子渗铌技术应用于TiAl合金从而改善其耐磨性能。对TiAl渗铌合金层组织,室温和600℃高温摩擦学性能进行了研究。结果表明,TiAl经离子渗铌后表面形成厚度约12μm的铌合金层,渗层组织致密均匀,其组成物主要包括AlNb2、AlNb3、Ti2AlNb和Nb。铌合金层在600℃的耐磨性明显提高,并且室温耐磨和减摩性能均优于TiAl基材。
The double glow-ionized niobium technology is applied to TiAl alloy to improve its wear resistance. The tribological properties of TiAl infiltrated niobium alloy layers at room temperature and 600 ℃ were studied. The results show that the niobium alloy layer with a thickness of about 12μm is formed on the surface of TiAl by iontophoresis. The microstructure of the layer is dense and uniform. The composition of the layer mainly consists of AlNb2, AlNb3, Ti2AlNb and Nb. The wear resistance of the niobium alloy layer at 600 ℃ is obviously improved, and the room temperature wear resistance and friction reduction performance are better than the TiAl substrate.