论文标题
CR2ALC中的Yttrium掺入：在（CR，Y）2ALC最大相薄膜的亚稳相形成和分解上
Yttrium incorporation in Cr2AlC: On the metastable phase formation and decomposition of (Cr,Y)2AlC MAX phase thin films
论文作者
论文摘要
本文中，我们通过在室温下从复合cr-al-c和元素y靶标共同分解亚稳态（CR，Y）2ALC最大相固体溶液的合成，然后退火。虽然直接的高温合成导致多相膜，如X射线衍射分析，室温下沉积所证明的那样，随后退火至760°C，导致形成了相纯（CR，Y）2ALC，通过扩散形成。较高的退火温度导致亚稳态相分解为CR2ALC，Y5AL3和CR碳化物。与纯CR2ALC相反，含Y的相位直接在最大相结构中结晶，而不是首先形成无序的实心溶液。此外，与CR2ALC相比，结晶温度显示为Y含量依赖性，并且在。％y时增加了5°C。预测（CR，Y）2ALC及其分解的亚稳态相的计算与实验发现非常吻合。
Herein we report on the synthesis of a metastable (Cr,Y)2AlC MAX phase solid solution by co-sputtering from a composite Cr-Al-C and elemental Y target, at room temperature, followed by annealing. While direct high-temperature synthesis resulted in multiphase films, as evidenced by X-ray diffraction analyses, room temperature depositions, followed by annealing to 760 °C led to the formation of phase pure (Cr,Y)2AlC by diffusion. Higher annealing temperatures caused decomposition of the metastable phase into Cr2AlC, Y5Al3 , and Cr-carbides. In contrast to pure Cr2AlC, the Y-containing phase crystallizes directly in the MAX phase structure instead of first forming a disordered solid solution. Furthermore, the crystallization temperature was shown to be Y-content dependent and was increased by ~200 °C for 5 at.% Y compared to Cr2AlC. Calculations predicting the metastable phase formation of (Cr,Y)2AlC and its decomposition are in excellent agreement with the experimental findings.
