添加元素Al,La改性IP-TiN膜性能研究

PROPERTIES OF ION PLATED TiN COATING MODIFIED BY ADDING Al and La

本文在离子镀TiN(IP-TiN)膜的基础上添加了6wt-％的金属元素Al和不同微量的稀土元素La(0.1,1.0,2.0wt-％),获得了改性的IP-TiN膜(称Al,La改性IP-TiN)。通过对镀膜性能的检测发现,当La含量增加到2wt-％时,镀膜与基材的附着强度明显提高;镀膜表面显微硬度、耐磨性亦随La含量增高出现有规律变化。经电子探针及X射线衍射分析认为是添加元素在镀膜与基材界面上形成较宽的使镀膜相组成及晶粒取向改变的过渡带所致。

A modified ion-plated IP-TiN coating has been developed by adding6 wt-% elementary Al and various small amounts of La. Examination of this coat-ing shows that the adhesion between the coating and substrate may be remarkablyimproved by the La added up to 2 wt-%, and the microhardness and wear resistanceof the coating surface may regularly change with the increase of La content. EPMAand X-ray diffraction analysis showed that the Al and La added are concentratedat the interface of the coating/substrate where a thicker transition zone formedwith an alternation of phase composition and grain orientation of the coating.Thus, an improvement over the properties of coating was proposed.