Mechanical properties of Fe 3Al/Al 2O 3 composite graded coatings
Mechanical properties of Fe 3Al/Al 2O 3 composite graded coatings
复制标题
DOI：
10.1016/s0169-4332(03)00941-3
复制
发表时间：
2004-01
影响因子：
6.7
通讯作者：
Y. Yin;Jingde Zhang;Jia Li;Yun Chen
中科院分区：
文献类型：
--
作者：
Y. Yin;Jingde Zhang;Jia Li;Yun Chen
在分析涂层热应力形成机理的基础上，根据实际热环境和力学原理，建立了涂层制备过程中热应力的计算模型。通过扫描电镜观察涂层的微观结构，研究了涂层的热机械行为及其对涂层性能的影响。结果表明，梯度涂层的热机械行为参数和制造应力随组分的变化而变化。最大的应力存在于底层，热应力从基底到表面逐渐减小。在梯度涂层中，涂层的最高应力和平均应力都较低。涂层成分的梯度分布可以有效地降低制备过程中的热应力。
On the basis of analyzing the formation mechanism of thermal stress in coatings, according to practical thermal conditions and mechanical principle, the calculating model that can estimate thermal stress of coatings during fabricating process is established. Through observing the microstructure of coatings by SEM, the thermal mechanical behavior and its effect on the properties of coatings are studied. The results show that, in graded coatings, parameters of thermal mechanical behavior and fabrication stress change with the compositions. The largest stress exists in the bottom layer and the thermal stress decrease from the substrate to the surface. In graded coatings, the highest stress and the average stress are both lower in coatings. The gradient distribution of coatings’ composition can effectively reduce thermal stress during fabrication process.