High-temperature stability of monazite-alumina composites
High-temperature stability of monazite-alumina composites
复制标题
独居石-氧化铝复合材料的高温稳定性
DOI：
10.1016/0921-5093(94)06521-7
复制
发表时间：
1995
期刊：
影响因子：
6.4
通讯作者：
R. Housley
中科院分区：
文献类型：
--
作者：
P. Morgan;D. Marshall;R. Housley
在1400和1600 °C的温度下研究独居石/氧化铝界面的化学和形态稳定性以及脱粘特性。在不存在杂质的情况下，发现界面在1600 °C下长时间（24 h）稳定，并保持其防止因脱粘而产生裂纹生长的能力。然而，在自由表面存在碱金属或二价元素（K、Mg、Ca等）的情况下，含La的β-氧化铝-磁铅石片晶在界面附近形成。提出这些元素通过倾向于形成更接近磁铅石类型的更稳定的“填充”结构来稳定β-氧化铝-磁铅石结构。
The chemical and morphological stability and debonding characteristics of monazite/alumina interfaces were examined at temperatures of 1400 and 1600 °C. In the absence of impurities, the interface was found to be stable for long periods (24 h) at 1600 °C and to retain its ability to prevent crack growth by debonding. However, in the presence of alkali metal or divalent elements (K, Mg, Ca and others) at a free surface, La-containing β-alumina-magnetoplumbite platelets form near the interface. It is proposed that these elements stabilize the β-alumina-magnetoplumbite structure by tending to form the more stable ‘stuffed’ structure closer to the magnetoplumbit type.