刘庆辉,许晓静.Ti-16.28Si合金的高温抗氧化行为及添加Cu的影响[J].稀有金属材料与工程,2018,47(1):267~273.[liuqinghui,xuxiaojing.High temperature oxidation behavior of Ti-16.28Si alloy and effect of Cu addition[J].Rare Metal Materials and Engineering,2018,47(1):267~273.]
Ti-16.28Si合金的高温抗氧化行为及添加Cu的影响
投稿时间:2015-11-20  修订日期:2015-12-21
中文关键词:  球磨  烧结  高温氧化  氧化动力学  抗氧化性能
基金项目:
中文摘要:
      选用Ti、Si、Cu粉末通过高能球磨-冷压-无压烧结制备了Ti-16.28Si和Ti-15.46Si-5Cu两种合金,并在800℃、900℃、1000℃空气中对其进行高温氧化试验。利用SEM、EDS及XRD对烧结和氧化试样的表面及横截面形貌、物相组成进行分析,以研究合金的氧化机制。结果表明:两种配方试样烧结之后主要含有Ti、Ti5Si3、Ti5Si4相,加Cu配方出现Cu3Si相;加Cu后致密度升高。高温氧化80 h后,氧化试样的主要物相为TiO2,还含有少量的SiO2、Ti3O5、TiO、TiN、CuO或Cu2O相。两种合金在800℃和900℃氧化温度下都达到抗氧化等级。Ti-16.28Si合金在900?C时氧化膜表层基本上全是金红石TiO2,抗氧化性能最好。800℃下,添加Cu显著改善Ti-16.28Si合金的抗氧化性能;在Cu含量为5 wt%时其平均氧化速度仅为Ti-16.28Si合金的57.8 %;但在900℃和1000℃下,添加Cu后,Cu3Si相可降低合金的抗氧化性能。
High temperature oxidation behavior of Ti-16.28Si alloy and effect of Cu addition
英文关键词:ball milling  sintering  high temperature oxidation  oxidation kinetics  oxidation resistance
英文摘要:
      Ti-16.28Si and Ti-15.46Si-5Cu alloys were preparation by high-energy ball milling, cold-pressureless sintering using Ti, Si and Cu powder. The oxidation mechanism of alloys at high temperature oxidation test under 800℃, 900℃, 1000℃ in air were investigated by analyzing the surface and cross-section morphologies and phase composition of sintered and oxidised samples by means of SEM, EDS and XRD. The results show that two kinds of formula samples are mainly containing of Ti, Ti5Si3 and Ti5Si4 phases after sintered, and contain Cu3Si phase of the formula adding Cu; The density increased with Cu added. The main phase of the oxidised samples for 80 h is TiO2, with a small number of SiO2, Ti3O5, TiO, TiN, CuO or Cu2O phases. The oxidation resistance of two alloys reach antioxidant levels at 800℃ and 900℃. For Ti-16.28Si alloy, it possesses the best oxidation resistance at 900℃ with the single rutile TiO2 phase nearly. At 800℃, Cu significantly improves the oxidation resistance of Ti-16.28Si alloy; Compared to Ti-16.28Si alloy, the average oxidation speed is 57.8% of it when the Cu content is 5wt% . However, under 900℃and 1000℃, the oxidation resistance of Ti-16.28Si alloy reduced with Cu added duo to the existing of Cu3Si phase.
作者单位E-mail
刘庆辉 江苏大学机械工程学院 qinghui0809@126.com 
许晓静 江苏大学先进制造与现代装备技术工程研究院 xjxu67@126.com 
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