Lanthanum magnesium hexaluminate thermal barrier coatings with pre-implanted vertical microcracks: Thermal cycling lifetime and CMAS corrosion behaviour
Lanthanum magnesium hexaluminate thermal barrier coatings with pre-implanted vertical microcracks: Thermal cycling lifetime and CMAS corrosion behaviour
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具有预植入垂直微裂纹的六铝酸镧镁热障涂层：热循环寿命和 CMAS 腐蚀行为
DOI：
10.1016/j.ceramint.2018.03.209
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发表时间：
2018-07
影响因子：
5.2
通讯作者：
Xueqiang Cao
中科院分区：
文献类型：
--
作者：
Jinyan Zeng;Junbin Sun;Hao Zhang;Fengyuan Qiu;Peifan Zhou;Wenbo Niu;Shujuan Dong;Xin Zhou;Xueqiang Cao
大气等离子喷涂（APS）涂层具有层状结构，以及较低的应变公差和较短的寿命比EB-PVD涂层。在这项研究中，热障涂层组成的LaMgAl 11 O 19（LMA）的顶部涂层和NiCrAlY粘结层，制备APS结合干冰喷射植入垂直微裂纹在顶部涂层。研究了预注垂直微裂纹LMA-TBCs的热循环寿命和CMAS腐蚀行为。结果表明，LMA涂层具有改善的垂直微裂纹比例，相应的TBC具有改善的热循环寿命。涂层中的垂直微裂纹不仅降低了热障涂层的热应力，而且提高了热障涂层的应变容限，显著提高了热障涂层的热循环寿命。令人惊讶的是，具有注入垂直微裂纹的LMA型热障涂层的CMAS耐腐蚀性优于具有典型层状结构的常规热障涂层。
Atmospheric plasma-sprayed (APS) coatings have a layered structure as well as lower strain tolerance and a shorter lifetime than EB-PVD coatings. In this study, TBCs composed of a LaMgAl11O19(LMA) top coat and a NiCrAlY bond coat were prepared by APS coupled with dry-ice blasting to implant vertical microcracks in the top coat. The thermal cycling lifetime and CMAS corrosion behaviour of LMA-TBCs with pre-implanted vertical microcracks were investigated in detail. The results show that the LMA top coat possesses an improved proportion of vertical microcracks and that the corresponding TBC has an improved thermal cycling lifetime. The vertical microcracks in the top coats, which not only reduce the thermal stress but also improve the strain tolerance of TBCs, dramatically contribute to the improvement in the thermal cycling lifetime. Surprisingly, the CMAS corrosion resistance of LMA-type TBCs with implanted vertical microcracks is better than that of conventional TBCs with a typical layered structure.
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用于高级热障涂层的稀土六铝酸盐 LnMgAl(11)O(19)（Ln：La、Pr、Nd、Sm、Eu 和 Gd）磁铅石的热物理性质
影响因子：
5.7
作者：
Lu Haoran;Wang Chang-An;Zhang Chenguang;Tong Shuyan
通讯作者：
Tong Shuyan
影响因子：
5.4
作者：
S. Dong;B. Song;B. Hansz;H. Liao;C. Coddet
通讯作者：
S. Dong;B. Song;B. Hansz;H. Liao;C. Coddet
影响因子：
3.1
作者：
R. Vaßen;A. Stuke;D. Stöver
通讯作者：
R. Vaßen;A. Stuke;D. Stöver
影响因子：
0.8
作者：
M. Stiger;M. M. Yanar-M.;M. Topping;F. Pettit;G. H. Meier
通讯作者：
M. Stiger;M. M. Yanar-M.;M. Topping;F. Pettit;G. H. Meier
影响因子：
6.2
作者：
Yang Guangliang;Lü Xian-Yi;Bai Yi-zhen;Cui Haifeng;Jin Zeng-sun
通讯作者：
Yang Guangliang;Lü Xian-Yi;Bai Yi-zhen;Cui Haifeng;Jin Zeng-sun