• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Refractory coatings for containment of molten reactive metals and their alloys.
【24h】

Refractory coatings for containment of molten reactive metals and their alloys.

机译：用于盛放熔融活性金属及其合金的耐火涂料。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The primary difficulty with continuous casting of reactive metals, specially titanium and its alloys, is the inability of current crucible materials to withstand the rigors of prolonged exposure to the high temperatures and reactive environment necessary to process reactive metals. Crucible material selection and crucible fabrication will be critical to successful continuous cast technology of reactive metals. Thermodynamic analysis was employed to choose the potential crucible compounds for molten reactive metals and to explain the experimental results. Plasma spraying technology was used to build multi-layer crucibles. Resistive and induction melting techniques were used to investigate the actual high temperature thermodynamics and interface reactions between molten reactive metals (titanium and titanium aluminide) and crucible coatings.; Experimental results and thermodynamic analysis showed that {dollar}rm Ysb2Osb3{dollar} has the highest stability and lowest oxygen contamination for contact with molten titanium, which confirmed the importance of {dollar}rm Ysb2Osb3{dollar} as a containment material. Its disadvantage was a low thermal shock resistance. The complex oxide, SrZrO{dollar}sb3{dollar}, was identified as another potential candidate that showed real potential for containment of molten titanium. At 1760{dollar}spcirc{dollar}C for 30 minutes, a low zirconium content but no detectable strontium was found in titanium, and titanium oxygen contamination was the second lowest.; CaO-stabilized ZrO{dollar}sb2{dollar}, {dollar}rm Ysb2Osb3{dollar}-stabilized ZrO{dollar}sb2{dollar}, CaTiO{dollar}sb3{dollar}, and CaZrO{dollar}sb3{dollar} crucibles were eliminated for containment of molten titanium because these compounds severely contaminated titanium. Of three degradation mechanisms of the ceramic coating: dissolution, reaction and erosion, dissolution was the main mechanism observed. A general thermodynamic procedure was developed to choose the potential crucible compounds for molten reactive metals using the compound free energy and the oxide solubility in molten reactive metals as the most primary factors for selection.
机译：连续浇铸反应性金属（特别是钛及其合金）的主要困难是当前的坩埚材料无法承受长时间暴露于加工反应性金属所必需的高温和反应性环境中的严酷环境。坩埚材料的选择和坩埚制造对于成功地反应金属连续铸造技术至关重要。使用热力学分析来选择用于熔融活性金属的潜在坩埚化合物并解释实验结果。等离子喷涂技术被用来制造多层坩埚。电阻和感应熔化技术用于研究熔融的活性金属（钛和铝化钛）和坩埚涂层之间的实际高温热力学和界面反应。实验结果和热力学分析表明，{rm} Ysb2Osb3 {dollar}与熔融钛接触具有最高的稳定性和最低的氧污染，这证实了{rm} Ysb2Osb3 {dollar}作为密封材料的重要性。其缺点是耐热冲击性低。复合氧化物SrZrO {dollar} sb3 {dollar}被确定为另一个潜在的候选物，它显示出真正的熔融钛遏制潜力。在1760℃约30分钟的温度下，钛中的锆含量低，但没有可检测到的锶，钛的氧污染次之。 CaO稳定的ZrO {dollar} sb2 {dollar}，rm Ysb2Osb3 {dollar}稳定的ZrO {dollar} sb2 {dollar}，CaTiO {dollar} sb3 {dollar}和CaZrO {dollar} sb3 {dollar}坩埚由于这些化合物严重污染了钛，因此将其去除以容纳熔融钛。在陶瓷涂层的三种降解机理中：溶解，反应和腐蚀，溶解是观察到的主要机理。开发了一种通用的热力学程序，使用化合物的自由能和氧化物在熔融反应性金属中的溶解度作为选择的最主要因素，来选择熔融反应性金属的潜在坩埚化合物。

著录项

  • 作者

    Su, Hui.;

  • 作者单位

    Oregon Graduate Institute of Science and Technology.;

  • 授予单位 Oregon Graduate Institute of Science and Technology.;
  • 学科 Engineering Materials Science.; Engineering Metallurgy.
  • 学位 Ph.D.
  • 年度 1996
  • 页码 155 p.
  • 总页数 155
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;冶金工业;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
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