Oriented Nucleation of Diopside Crystals in Glass
Oriented Nucleation of Diopside Crystals in Glass
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DOI：
10.1021/cg3009909
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发表时间：
2012-09
影响因子：
3.8
通讯作者：
W. Wisniewski;K. Otto;C. Rüssel
中科院分区：
文献类型：
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作者：
W. Wisniewski;K. Otto;C. Rüssel
含有透辉石的陶瓷或玻璃陶瓷材料由于其作为生物活性材料的潜在用途而引起了极大的兴趣。本文描述了透辉石从重量百分比组成为54.96SiO2·18.4MgO·25.64CaO·1Al2O3的玻璃表面生长的过程。从表面记录 EBSD 图案并以透辉石索引。观察到晶体相对于玻璃表面取向。晶体以不对称金字塔的形式生长，从表面突出最多 0.3 μm。这些金字塔至少包含四个不同的方向，它们共享一个共同的 (100) 平面，表明机械孪生。每个孪晶的晶体取向在沿表面生长的过程中发生变化。在晶体生长成块体的过程中观察到动力学选择，这不会以固体晶体体的形式发生。没有检测到覆盖晶体的玻璃皮。
Ceramic or glass-ceramic materials containing diopside attract a great deal of interest due to their potential use as bioactive materials. In this paper, the growth of diopside from the surface of a glass with the weight percent composition 54.96SiO2·18.4MgO·25.64CaO·1Al2O3 is described. EBSD-patterns were recorded from the surface and indexed as diopside. It was observed that the crystals were oriented with respect to the surface of the glass. The crystals grew in the form of asymmetrical pyramids which protrude from the surface by up to 0.3 μm. These pyramids contain at least four different orientations which share a common (100)-plane, indicating mechanical twinning. The crystal orientation of each twin changes during growth along the surface. Kinetic selection was observed during crystal growth into the bulk which does not occur in the form of solid crystal bodies. A glass skin covering the crystals was not detected.