Introducing segmentation cracks in air plasma-sprayed thermal barrier coatings by controlling residual stress
Introducing segmentation cracks in air plasma-sprayed thermal barrier coatings by controlling residual stress
复制标题
通过控制残余应力在空气等离子喷涂热障涂层中引入分段裂纹
DOI：
10.1111/jace.18101
复制
发表时间：
2021-08
影响因子：
3.9
通讯作者：
Xiaofeng Zhao
中科院分区：
文献类型：
--
作者：
Lirong Luo;Zhonghua Zou;Xiao Shan;Huangyue Cai;Lixia Yang;Hongyun Jin;Xiaofeng Zhao
切分裂纹对于提高热障涂层的应变容限和降低脱层倾向至关重要。本研究通过控制残余应力，在空气等离子喷涂TBCs中制备了分段裂纹。采用微量α - al2o3杂质作为应力传感器，利用光致发光压电光谱技术表征了涂层中应力的演变过程。在沉积涂层中形成的拉应力（~170 MPa）通过进一步的热暴露转化为压应力。研究了涂层中切分裂纹的形成与应力的关系。结果表明，当涂层厚度达到临界厚度时，可形成分节裂纹。切割裂纹的临界厚度和间距取决于沉积涂层中的拉伸应力，可以通过控制沉积温度和衬底温度来控制。此外，还研究了氧化钇稳定氧化锆涂层的微观结构和相组成的演变。
Segmentation cracks are crucial for enhancing the strain tolerance and decreasing the propensity of delamination for thermal barrier coatings (TBCs). In this study, segmentation cracks were prepared in air plasma‐sprayed TBCs by controlling the residual stress. The evolution of the stress in the coating was characterized via photoluminescence piezospectroscopy using traceα‐Al2O3impurities as stress sensor. Tensile stress (~170 MPa) formed in the as‐deposited coating was converted into compressive stress through further thermal exposure. The relationship between the formation of the segmentation cracks and stress in the coating was investigated. It was demonstrated that the segmentation cracks could be formed when a critical coating thickness is achieved. The critical coating thickness and spacing of the segmentation cracks dependent on the tensile stress in the as‐deposited coating, and they could be manipulated by controlling the deposition and substrate temperatures. In addition, the evolution of the microstructure and phase composition of the yttria‐stabilized zirconia coating was examined.
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DOI：
10.1016/0956-7151(94)90377-8
发表时间：
1994-05
期刊：
Acta Metallurgica Et Materialia
影响因子：
--
作者：
Q. Ma;W. Pompe;J. D. French;D. Clarke
通讯作者：
Q. Ma;W. Pompe;J. D. French;D. Clarke
对于具有改进的抗热震性能的大气等离子喷涂厚热障涂层，合适的分段裂纹密度是多少？
影响因子：
6.7
作者：
Wang L;Zhong X H;Shao F;Ni J X;Yang J S;Tao S Y;Wang Y
通讯作者：
Wang Y
影响因子：
9.4
作者：
S. Shinde;E. Gildersleeve V;C. A. Johnson;S. Sampath
通讯作者：
S. Shinde;E. Gildersleeve V;C. A. Johnson;S. Sampath
影响因子：
3.4
作者：
Ghazanfar Mehboob;Tong Xu;Guang Li;Guanjun Yang;Adnan Tahir;M. Ragab;S. Hussain
通讯作者：
Ghazanfar Mehboob;Tong Xu;Guang Li;Guanjun Yang;Adnan Tahir;M. Ragab;S. Hussain
DOI：
10.1016/j.msea.2012.11.126
发表时间：
2013-03
影响因子：
6.4
作者：
Erin M. Donohue;N. Philips;M. Begley;C. Levi
通讯作者：
Erin M. Donohue;N. Philips;M. Begley;C. Levi