纳米镍微粒在耐高温陶瓷涂层中的作用

Effect of Nano-size Nickel Particles on the Wear Resistance and High-temperatureResistance of the Ultra-fine Ceramic Coating

为了提高钛及钛合金高温抗氧化能力,用流涂工艺在工业纯钛上得到含纳米镍微粒的高温超细陶瓷涂层,通过氧化动力学实验及结合力试验,纳米镍微粒在涂层中对涂层基体的结合及涂层的抗氧化性有着重大作用,试验用光学显微镜(OM)、扫锚电子显微镜(SEM)及X射线衍射(XRD)进行分析,得知纳米镍微粒在涂层中的作用机制。当加入10%(质量分数)的纳米镍微粒时,其抗氧化力及与基体的结合力最佳。

In order to improve the wear resistance and high temperature oxidation resistance of titanium and titanium alloy, the high temperature ultra-fine ceramic coating containing nano-size nickel particles is obtained by flow coat method on the industrially pure titanium TB1-0. The affection of adding nano-size nickel particles into the coating on the coating-substrate system is investigated through oxidation kinetics experiment, wear resistance test. The morphology of the specimens is examined by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that high temperature ultra-fine ceramic coating has notable protection effect on industrially pure titanium TB1-0 from oxidation. The oxidation and wear resistance properties of the coating can be effectively improved by adding nano-size nickel particles, and the coating containing 10% (mass fraction) nano-size nickel shows optimum property.