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首页> 外文期刊>Journal of Materials Processing Technology >Phase compositions and depth-profiling of calcium aluminates in a functionally-graded alumina/calcium-hexaluminate composite
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Phase compositions and depth-profiling of calcium aluminates in a functionally-graded alumina/calcium-hexaluminate composite

机译：功能梯度氧化铝/六铝酸钙复合材料中铝酸钙的相组成和深度分析

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摘要

The phase developments, abundances and depth-profiling of various calcium aluminates (i.e. CA, CA_2 and CA_6) in a functionally-graded alumina/calcium-hexaluminate material (FGM) at temperatures ranging 1000-1650 deg C have been systematically analysed by X-ray diffraction (XRD) and synchrotron radiation diffraction (SRD). Results show that CA and CA_2 formed at approximately 1000 and 1300 deg C, respectively, remained stable even at 1400 deg C, but eventually transformed fully to CA_6 at 1650 deg C. XRD of the FGM shows the presence of corundum in the alumina layer and a mixture of CA_6 and corundum in the graded region. Qualitative depth-profiles of phase contents within the FGM show that the abundance of CA_6 in the graded layer decreased gradually with increasing depths towards the alumina layer.
机译：X-系统分析了功能梯度氧化铝/六铝酸钙材料（FGM）中各种铝酸钙（CA，CA_2和CA_6）在1000-1650摄氏度温度下的相发展，丰度和深度分布。射线衍射（XRD）和同步加速器辐射衍射（SRD）。结果表明，分别在约1000和1300℃形成的CA和CA_2甚至在1400℃仍保持稳定，但最终在1650℃完全转变为CA_6。FGM的XRD显示氧化铝层中存在刚玉。渐变区域中CA_6和刚玉的混合物。 FGM中相含量的定性深度剖面表明，随着朝向氧化铝层的深度增加，梯度层中CA_6的丰度逐渐降低。

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