Both tensile and shear adhesion strength tests were performed to evaluate interfacial strength between hydroxyapatite coatings on titanium alloy substrates subjected to anodization and heat treatment prior to deposition as well as post-deposition heat treatment. Results of the tensile adhesion strength tests were influenced by the size of the blasting media and the processing of pre- and post-heat treatments but not influenced by anodization. The finite element method (FEM) analysis of stress distribution during the shear adhesion strength test was also performed to evaluate the degree of stress singularity. The results show that the stress singularity parameters were dominant factors of stress distribution in the stress singularity fields, and they were also expected to influence the “essential” interfacial strength. In addition, the size of the blasting media had the same influence on the shear and tensile adhesion strength tests. This suggests the possibility of estimating tensile adhesion strength using the results of shear adhesion strength.

中文翻译：

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等离子喷涂羟基磷灰石涂层的界面强度

进行拉伸和剪切粘附强度测试以评估钛合金基材上的羟基磷灰石涂层之间的界面强度，该涂层在沉积前和沉积后热处理进行阳极氧化和热处理。拉伸粘合强度测试的结果受喷砂介质尺寸和热处理前后处理的影响，但不受阳极氧化的影响。还进行了剪切粘附强度试验过程中应力分布的有限元法 (FEM) 分析，以评估应力奇异程度。结果表明，应力奇异参数是应力奇异场中应力分布的主导因素，也有望影响“本质”界面强度。此外，喷砂介质的尺寸对剪切和拉伸粘附强度测试具有相同的影响。这表明使用剪切粘合强度的结果估计拉伸粘合强度的可能性。