Evaluation of thermal stress in hydroxyapatite film fabricated by powder jet deposition
Evaluation of thermal stress in hydroxyapatite film fabricated by powder jet deposition
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DOI：
10.1111/eos.12076
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发表时间：
2013-10-01
影响因子：
1.9
通讯作者：
Sasaki, Keiichi
中科院分区：
文献类型：
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作者：
Akatsuka, Ryo;Matsumura, Ken;Sasaki, Keiichi
本研究旨在通过粉末喷射沉积（PJD）装置在牙齿表面制备羟基磷灰石（HA）厚膜，并检测HA膜的微观结构和力学性能。特别讨论了热应力对薄膜的影响。在室温和常压下，将在1200摄氏度下煅烧的3.18 μ m HA颗粒喷射到搪瓷基材上，形成HA膜。制备并抛光了面积为3mm × 3mm的HA膜。通过热循环500次（5-55℃）人工时效前后的表面粗糙度、维氏硬度和结合强度，对HA膜的三维表面轮廓进行了评价。沉积膜中的HA颗粒密集堆积，热循环后HA膜表面没有变化。热循环前后HA膜的硬度和结合强度也无显著差异。本研究中制备的HA膜即使在施加热应力后也表现出优异的微观结构和机械性能。
This study aimed to create a thick hydroxyapatite (HA) film on the surface of a human tooth via a powder jet deposition (PJD) device for dental handpieces, and to examine the microstructural and mechanical properties of the HA film. In particular, the effects of thermal stress on this film were evaluated. The HA film was created by blasting 3.18-mu m HA particles, calcinated at 1,200 degrees C, onto the enamel substrate at room temperature and atmospheric pressure. An HA film with an area of 3 mm x 3 mm was prepared and polished. The following HA film parameters were evaluated from the three-dimensional surface profile: surface roughness, Vickers hardness, and bonding strength before and after artificial aging induced by 500 cycles of thermal cycling (5-55 degrees C). The HA particles in the deposited film were densely packed, and the surface of the HA film was unchanged after thermal cycling. There were also no significant differences in the hardness and the bonding strength of the HA film before and after thermal cycling. The HA film created in this study demonstrated excellent microstructural and mechanical properties, even after the application of thermal stress.