【摘 要】
：
采用高能球磨-冷压-真空烧结工艺制备了Ti-16.28Si、Ti-15.46Si-5Cu和Ti-14.65Si-10Cu三种合金,并在900℃下空气中对其进行了高温氧化试验.通过SEM、EDS及XRD对烧结和氧化后样品的表面形貌、横截面形貌及物相组成进行分析,以研究Cu含量对Ti-16.28Si合金在900℃下的氧化机制.结果表明:三种样品烧结之后主要含有Ti、Ti5Si3、Ti5Si4相,加Cu
【机 构】
：
江苏大学,先进制造与现代装备技术工程研究院,江苏镇江212013
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采用高能球磨-冷压-真空烧结工艺制备了Ti-16.28Si、Ti-15.46Si-5Cu和Ti-14.65Si-10Cu三种合金,并在900℃下空气中对其进行了高温氧化试验.通过SEM、EDS及XRD对烧结和氧化后样品的表面形貌、横截面形貌及物相组成进行分析,以研究Cu含量对Ti-16.28Si合金在900℃下的氧化机制.结果表明:三种样品烧结之后主要含有Ti、Ti5Si3、Ti5Si4相,加Cu后的样品中出现了Cu3Si相且致密度随Cu含量升高而升高.900℃氧化80h后,合金样品表面的主要物相为TiO2,同时还含有少量的SiO2、Ti3O5、CuO或Cu2O等相.三种合金中,Ti-16.28Si合金的氧化膜表层基本上都是TiO2,抗氧化性能最好;其余两种合金的抗氧化性能稍低,Cu元素的加入降低了合金在900℃下的抗氧化性能.钛硅化合物含量的提升可以改善合金的抗氧化性能.
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