论文部分内容阅读
将Ti-33Nb-4Sn钛合金置于箱式电阻炉中,分别在600、650、700、750、800℃的静态空气中进行高温氧化获得表面氧化层。用扫描电镜和XRD对氧化层进行分析。结果表明:随温度的增加,氧化程度加剧,氧化层的厚度随之增加,导致氧化层与金属的内应力增加,结合力下降,氧化膜有脱落现象。在600~700℃,Ti(Nb)O的峰随温度升高先增强后减弱;在650℃时,出现了新的Ti_xNb_yO相。当温度达到700℃时出现了金红石相,随氧化温度的升高,在700~800℃时,金红石相的峰值强度逐渐增强,Ti Nb相的峰值强度逐渐减弱。
The Ti-33Nb-4Sn titanium alloy was placed in a box-type resistance furnace and subjected to high-temperature oxidation in static air at 600, 650, 700, 750 and 800 ° C respectively to obtain a surface oxide layer. Oxide layers were analyzed by scanning electron microscopy and XRD. The results show that with the increase of temperature, the oxidation degree aggravates and the thickness of the oxide layer increases, which leads to the increase of the internal stress of the oxide layer and the metal, the decrease of the bonding force and the loss of the oxide film. At 600-700 ℃, the peak of Ti (Nb) O first increases and then decreases with increasing temperature. At 650 ℃, a new Ti_xNb_yO phase appears. The rutile phase appeared when the temperature reached 700 ℃. With the increase of the oxidation temperature, the peak intensity of rutile phase gradually increased and the peak intensity of Ti Nb phase gradually decreased at 700-800 ℃.