Adhesion and Cohesion of Three-Dimensional Porous Calcium Phosphate Coatings on Titanium Deposited by Ultrasound-Assisted Micro-Arc Oxidation Method

IF 0.4 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
E. G. Komarova, E. A. Kazantseva, E. B. Akimova, P. V. Uvarkin
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Abstract

The comprehensive approach using both pull-off tensile and scratch tests provided a detailed understanding of the adhesion and cohesion properties of the 3D-porous calcium phosphate (CaP) coatings deposited on a Ti substrate by the ultrasound-assisted micro-arc oxidation (UMAO) method. Using the pull-off tensile test which takes into account tensile stresses directed normally to the coating surface, it was found that the ultrasound (US) employing during the the micro-arc oxidation (MAO) process led to a slight decrease in the adhesion of the coating to the substrate from 23.4 to 19.3 MPa as well as to a change in the failure mechanism from the cohesive type characteristic for the control MAO coatings to the adhesive-cohesive type for the UMAO coatings. On the contrary, the results of the scratch test, which takes into account compressive stresses directed normally and tangentially to the coating surface, showed that the US employed during the MAO process led to an increase in the critical loads LC2 and LC3 to 6.7 and 30.6 N, respectively, promoting the adhesive-cohesive and adhesive failures of the coatings. Thus, the US employed during the MAO process led to an increase in the critical shear stresses of the UMAO coatings, thereby increasing their abrasion resistance.

超声辅助微弧氧化法沉积在钛上的三维多孔磷酸钙涂层的附着力和内聚力
利用拉脱拉伸试验和划痕试验的综合方法详细了解了通过超声辅助微弧氧化(UMAO)方法沉积在钛基底上的三维多孔磷酸钙(CaP)涂层的附着力和内聚力特性。拉伸试验考虑的是正常指向涂层表面的拉伸应力,使用拉伸试验发现,在微弧氧化(MAO)过程中使用超声波(US)导致涂层与基底的附着力从 23.4 兆帕轻微下降到 19.3 兆帕,失效机制也从对照 MAO 涂层的内聚型特征转变为 UMAO 涂层的粘附型特征。相反,考虑到正常方向和切线方向对涂层表面的压应力的划痕试验结果表明,在 MAO 过程中使用的 US 导致临界载荷 LC2 和 LC3 分别增加到 6.7 和 30.6 N,促进了涂层的粘合-内聚型和粘合型失效。因此,MAO 工艺中使用的 US 导致 UMAO 涂层的临界剪切应力增加,从而提高了其耐磨性。
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来源期刊
Russian Physics Journal
Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
50.00%
发文量
208
审稿时长
3-6 weeks
期刊介绍: Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.
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