• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>UNITECR 2011 >Studies on wear of unshaped Al_2O_3-SiC-C refractories by means of optical cathodoluminescence microscopy: A fast, powerful method to distinguish between refractory melt interactions and thermally and pO_2 induced in situ material alteration.
【24h】

Studies on wear of unshaped Al_2O_3-SiC-C refractories by means of optical cathodoluminescence microscopy: A fast, powerful method to distinguish between refractory melt interactions and thermally and pO_2 induced in situ material alteration.

机译：光学阴极致发光显微镜显微镜磨损的磨损研究：一种区分耐火熔体相互作用和热和PO_2诱导原位材料改变的快速，强大的方法。

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present work is subjected to the thermo-chemical stability of clay bond Al_2O_3-SiC-C refractory ramming mixes at high temperatures (1400 to 1500°C) and very low O_2 partial pressures （p_(O2)~1400°C)= 1.1?10~(-11) to p_(O2)~1400°C)=4.6?10~(-18)bar. It is approved by laboratory corrosion tests that auto degradation of Al_2O_3-SiC-C refractory ramming mixes is possible under very low po2-conditions. However, no auto degradation of SiC occurred in Ar_(95)%/H_(5%)- atmosphere in our experiments, differing from those in which CO is present. By means of optical cathodoluminescence microscopy (CLM) about 10 vol.-% in situ melt formation was quantified and discriminated from process derived infiltrates in post mortem material. Optical cathodoluminescence microscopy is a powerful method for fast sample characterization with distinct advantages over conventional optical microscopy. The strong luminescence color of many phases encountered in refractories allows resolving grain zoning (e.g. sintered corundum) or to identify reaction zones (e.g. anorthite formation at the slag/refractory interface). In particular, CLM-assisted qualitative phase identification and differentiation is often superior to electron microscopy where the very similar mean atomic numbers of phases in refractories result in almost identical grey scales, even when operating in BSE mode.
机译：本工件经受（〜1500℃1400）在高温下的粘土键Al_2O_3的碳化硅碳耐火捣打料的热化学稳定性和非常低的O_2分压（P_（O2）〜1400℃）= 1.1 ？10〜（-11）到P_（O2）〜1400°C）= 4.6〜10〜（-18）巴。它是由实验室腐蚀试验结果表明：Al_2O_3的碳化硅碳耐火材料捣打料的自动降解非常低氧分压条件下是可能的。然而，碳化硅的无自动降解发生在Ar_（95）％/ H_（5％） - 气氛在我们的实验中，从那些其中CO存在不同。通过光学显微镜的阴极发光（CLM）约10的装置体积％原位熔化物形成进行定量和识别从过程得到在验尸材料浸润。光学显微镜的阴极发光是用于通过常规光学显微镜明显的优点快速样本表征的有效方法。在耐火材料遇到了许多相的强发光色允许分辨谷粒分区（例如烧结刚玉）或（在渣/难治接口例如钙长石形成），以确定反应区。特别地，CLM辅助定性相鉴别和分化是常常优于电子显微镜，其中相的耐火材料中的非常相似的平均原子序数导致几乎相同的灰度级，在BSE模式下操作时也是如此。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号