Wear Rates and the TEM Characterisation of Polycrystalline Aluminas

机译：多晶氧化铝的磨损率和TEM表征

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Polycrystalline aluminas sintered with differing amounts of calcium oxide and silica in 1:1 molar ratios were made by precipitation, calcination and pressureless sintering. Wet erosive wear rates of the densified pellets were determined and appeared to have a dependence on the amount of additive present. The grain sizes were analysed by SEM. HRTEM revealed the presence of an intergranular glassy phase at two and three grain boundaries. The width of this film, determined by HRTEM, did not appear to change greatly with different levels of additive. EDX and EFTEM showed the segregation of CaO to the glassy intergranular phase.

机译：通过沉淀，煅烧和无压烧结制备了以不同摩尔比的氧化钙和二氧化硅以1：1摩尔比烧结的多晶氧化铝。测定了致密颗粒的湿侵蚀磨损率，并且似乎与存在的添加剂量有关。通过SEM分析晶粒尺寸。 HRTEM揭示了在两个和三个晶界处存在晶间玻璃态相。通过HRTEM测定的该膜的宽度似乎未随添加剂水平的不同而发生很大变化。 EDX和EFTEM显示CaO偏析到玻璃状晶间相。

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《Institute of Physics Electron Microscopy and Analysis Group Conference, Sep 5-7, 2001, Dundee》|2001年|p.275-278|共4页
会议地点 Dundee(GB);Dundee(GB)
作者
F Loughran; R Brydson; A Bell; FL Riley;
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作者单位

Department of Materials, University of Leeds, Leeds LS2 9JT;

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原文格式 PDF
正文语种 eng
中图分类无线电电子学、电信技术;
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Wear Rates and the TEM Characterisation of Polycrystalline Aluminas

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