(大连理工大学 材料工程系， 大连 116023)
摘 要: 通过直接集气法和X射线衍射分析， 研究了TiH2在空气中加热氧化处理前后的释氢行为。 结果表明： 经高于450 ℃空气中加热处理后TiH2于Ar气氛中释氢， TiH1.97和TiH1.92向TiH1.5转变的相变开始温度有明显的升高趋势， 表明氧化产物对TiH2有较好的缓释效果； 氧化温度对TiH2缓释效果的影响程度明显大于保温时间的影响。 TiH2在氧化过程中随温度和保温时间的变化有明显的颜色变化， 呈灰色→金绿色→金黄色→紫色→蓝色的变化趋势； 颜色的变化不仅表明了氧化产物厚度和相的变化， 而且还表明氧化是一个渐进的过程。
关键字: TiH2； 发泡剂； 泡沫铝； 氧化处理
gas release behavior of TiH2
（ Department of Material Engineering, Dalian University of Technology,
Dalian 116023, China）
Abstract: The releasing hydrogen behavior of TiH2 was studied by collecting gas directly and XRD analysis when TiH2 was heated in the atmosphere. The results show that TiH2 releases hydrogen in Ar atmosphere when the heating temperature is above 450 ℃. The starting temperature of phase change from TiH1.97 and TiH1.92 to TiH1.5 increases obviously, indicating that the oxides can slow the release of H2 obviously. Furthermore, the effect of heating temperature on the release of H2 is bigger than that of the heat preservation time. There is an obvious color change from grey to golden green, yellow, purple, and then to blue with the temperature and heat preservation time changing when heating TiH2 in the atmosphere, which shows the change of thickness of oxide and phase, and presents a gradual oxidation process.
Key words: TiH2; foaming agent; aluminum foam; oxidation treatment
