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首页> 外文期刊>Journal of Materials Science & Technology >Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: Part II Ring Crack
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Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: Part II Ring Crack

机译：金属夹层球形压痕下陶瓷涂层的元素分析：第二部分环裂纹

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摘要

Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. The fracture mechanics of the ceramic coatings mechanisms due to occurrence of surface ring cracks extending traverse the coating thickness under spherical indentation are investigated within the framework of linear fracture mechanics. The J-integral associated to such cracks was computed. The evolution of J-integral us the crack length and the indentation depth was studied. The effects of the interlayer, the coating and the substrate on the J-integral evolution were discussed. The results show that a suitable metallic interlayer can improve the fracture resistance of the coating systems under the same indentation conditions through reducing the J-integral.
机译：通过轴对称有限元分析（FEA）对具有金属夹层的陶瓷涂层进行球形压痕。考虑了两种典型的具有较高和较低弹性模量的陶瓷涂层，它们沉积在铝合金和碳钢上。在线性断裂力学的框架内，研究了由于球形压痕作用下横贯涂层厚度的表面环裂纹的出现而导致的陶瓷涂层机理的断裂力学。计算与此类裂纹相关的J积分。研究了J积分的发展，探讨了裂纹长度和压痕深度。讨论了中间层，涂层和基底对J积分演化的影响。结果表明，在相同的压痕条件下，合适的金属夹层可以通过减少J积分来提高涂层体系的抗断裂性能。

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