La,Ce在钛镍合金中的作用

Effects of Rare Earth Elements La and Ce on Ti-Ni Alloy

以近等原子比钛镍形状记忆合金为研究对象,通过向其分别添加微量第三元素稀土La,Ce,利用示差扫描热分析法、X射线衍射法分析研究了稀土元素La和Ce对Ti Ni形状记忆合金相变类型、相变温度、物相组成的影响,利用透射电子显微镜观察和分析了马氏体相的形貌1和结构。加入微量稀土元素能提高Ti Ni合金相变程度,但是合金的物相组成无明显变化,仍为B2母相和畸变单斜马氏体相B19′。结果表明,可以通过添加第三元素La,Ce得到一定工作条件下性能优良的Ti Ni形状记忆合金,提高Ti Ni合金在实际中的应用价值。

Rare earth elements Ce and La were added into the near-equal atomic titanium-nickel alloy. Differential scanning calorimetry and X-ray diffraction were applied to study the effect of the Ce and La. The results show that adding a small amount of Ce into (TiNi) alloy can improve the phase transformation obviously, but the phases in TiNi alloy do not change. The results show that adding a small amount of Ce or La can improve the properties of titanium-nickel alloy.