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首页> 外文会议>International Thermal Spray Conference Exposition >Thermal cycling behavior of suspension plasma sprayed yttria partially-stabilized zirconia thick thermal barrier coating
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Thermal cycling behavior of suspension plasma sprayed yttria partially-stabilized zirconia thick thermal barrier coating

机译：悬浮等离子体的热循环行为喷涂YtTRIA部分稳定的氧化锆厚的热阻挡涂层

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摘要

The present paper focused on evaluating the cyclic thermal shock performance of the suspension plasma sprayed (SPS) 7.5wt% Y_2O_3 partially stabilized ZrO_2 (7.5YSZ) thick thermal barrier coatings (TBCs). The SPS 7.5YSZ coating in thickness of approximately 720 microns was deposited on a 150 micron-thick CoNiCrAlY bond coat. The vertically segmented cracks were observed in the SPS 7.5YSZ coatings. The phase analysis shows that the coating crystallized in non-transformable tetragonal phase of zirconia. The thermal cycling test of the SPS 7.5YSZ coatings was carried out on a burner rig with propane-oxygen flame which heated the coating surface at temperature of 1523 K, followed by quenching to temperature of 423 K by compressed air. The results obtained shows that the SPS 7.5YSZ coatings performs longer thermal shock life relative to the atmospheric plasma sprayed (APS) counterparts under the same test conditions, which is probably attributed to the improvement in strain tolerance through the vertically segmented cracks therein. The failure behaviour of the SPS coatings is distinctly different from that of the APS coatings, which is supposed to be related to the special microstructure.
机译：本文集中于评估悬浮等离子体喷涂（SPS）7.5wt％Y_2O_3部分稳定的ZrO_2（7.5YSZ）厚的热阻挡涂层（TBC）的循环热冲击性能。在150微米厚的同色粘膜上沉积厚度约为720微米的SPS 7.5YSZ涂层。在SPS 7.5YSZ涂层中观察到垂直分段的裂缝。相分析表明，在氧化锆的不可变形的四方相中结晶的涂层。 SPS 7.5YSZ涂层的热循环试验在具有丙烷 - 氧气的燃烧器上进行，该燃烧器在1523k的温度下加热涂层表面，然后通过压缩空气淬灭423k的温度。获得的结果表明，SPS 7.5YSZ涂层相对于在相同的测试条件下的大气等离子体喷涂（APS）对应物中的较长热冲击寿命，这可能归因于通过其中通过垂直分段的裂缝的应变容差的改善。 SPS涂层的故障行为与APS涂层的故障行为明显不同，该APS涂层应该与特殊的微观结构有关。

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