...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Fracture behaviour of thermal barrier coatings after high temperature exposure in air
【24h】

Fracture behaviour of thermal barrier coatings after high temperature exposure in air

机译：空气中高温暴露后隔热涂层的断裂行为

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

Four point bending tests have been carried out on thermal barrier coating (TBC) specimens. The system studied consists of a plasma sprayed top coat (TC) of ZrO_2 6-8 wt.% Y_2O_3 (YSZ), an FeNiCrAlY bond coat (BC) and a mild steel substrate. To study the influence of temperature on this system, two heat treatments were adopted. The specimens were held in a furnace for 2 h at 580 and 900℃, and cooled inside the furnace to room temperature (RT). In addition, microstructural analyses were carried out after each treatment by using different techniques energy dispersive X-ray analysis (EDX); X-ray diffraction (XRD); Raman spectroscopy, and scanning electron microscopy (SEM)). Four point bending tests were carried out on heat-treated specimens and the results were compared with those for the as-sprayed condition. In situ observation of crack propagation events were carried out during the tests and it was found that cracks propagated through the TC-BC interface in specimens heat-treated at 580℃ heat treatment and also in the as-sprayed reference specimens. In contrast, after the 900℃ heat treatment they propagated across the BC-substrate interface. The drop in BC-substrate adhesion due to heat treatment at 900℃ prevailed over the mechanical weakness induced at the TC-BC interface.
机译：已经对热障涂层（TBC）样品进行了四点弯曲测试。所研究的系统由ZrO_2 6-8 wt。％Y_2O_3（YSZ）的等离子喷涂面涂层（TC），FeNiCrAlY粘结涂层（BC）和低碳钢基材组成。为了研究温度对该系统的影响，采用了两种热处理方法。将样品在580和900℃的炉子中放置2小时，然后在炉子内冷却至室温（RT）。另外，在每次处理之后，通过使用不同的技术能量色散X射线分析（EDX）进行了显微结构分析。 X射线衍射（XRD）；拉曼光谱和扫描电子显微镜（SEM））。对热处理过的样品进行四点弯曲测试，并将结果与​​喷涂条件下的结果进行比较。在测试过程中对裂纹扩展事件进行了现场观察，发现在580℃热处理的试样以及喷涂的参考试样中，裂纹均通过TC-BC界面扩展。相反，在900℃热处理后，它们在BC-底物界面上传播。由于在900℃下进行热处理而导致的BC-基底粘附力下降超过了TC-BC界面引起的机械弱点。

著录项

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