Effect of YSZ thin film coating thickness on the strength of a ceramic substrate.
Effect of YSZ thin film coating thickness on the strength of a ceramic substrate.
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YSZ薄膜涂层厚度对陶瓷基体强度的影响
DOI：
10.1002/jbm.b.30855
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Thompson,JeffreyY
中科院分区：
文献类型：
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作者：
Teixeira,EricaC;Piascik,JeffreyR;Stoner,BrianR;Thompson,JeffreyY
虽然陶瓷用于许多不同的生物医学应用，但它们是脆性材料，在应力下会受到表面缺陷的影响。本研究的目的是评价氧化钇稳定氧化锆（YSZ）薄膜涂层表面改性对可加工牙科陶瓷强度的影响。从ProCAD（Ivoclar‐Vivadent）组织块上切割50个棒（2 mm ×××× 2 mm ×××× 15 mm）。通过1200粒度SiC磨料对样本进行湿法抛光。每个棒的一个表面用50 μm Al 2 O3磨料（0.34 MPa）喷砂。通过在喷砂表面上沉积溅射的YSZ薄膜，对试样进行了进一步的改性。评估了不同的薄膜厚度：1、3、5和7 μm。使用射频磁控溅射系统（工作压力为15 mT，150°C，30：1 Ar/O2气体比）进行沉积。在去离子水（37°C）中，在伺服电动材料测试系统中通过三点弯曲（跨度= 10 mm）进行抗弯强度测量。结果表明，沉积3 μ mYSZ涂层后，瓷的强度显著提高。膜厚与强度呈非线性关系。陶瓷的强化是通过溅射YSZ薄膜的应用。据推测，强化机制是由于修改的表面缺陷和/或表面残余应力所施加的薄膜。© 2007威利期刊公司生物医学材料研究杂志B部分：应用生物材料，2007年
Although ceramics are used for many different biomedical applications they are brittle materials that can be compromised by surface defects when under stress. The objective of this study was to evaluate the effect of surface modification with an yttria‐stabilized zirconia (YSZ) thin film coating on the strength of a machinable dental ceramic. Fifty bars (2 mm ×××× 2 mm ×××× 15 mm) were cut from ProCAD (Ivoclar‐Vivadent) blocks. Specimens were wet‐polished through 1200‐grit SiC abrasive. One surface of each bar was sandblasted with 50 μm Al2O3abrasive (0.34 MPa). Specimens were further modified through the deposition of a sputtered YSZ thin film on the sandblasted surface. Different thin film thicknesses were evaluated: 1, 3, 5, and 7 μm. Depositions were performed using a radio frequency magnetron sputter system (working pressure of 15 mT, 150°C, 30:1 Ar/O2gas ratio). Flexural strength measurements were carried out by three‐point bending (span = 10 mm) in a servo‐electric material testing system in DI water (37°C). The results showed that the strength of porcelain significantly increased with the deposition of a 3‐μm YSZ thick coating. A nonlinear relationship was observed between film thickness and strength. Strengthening of porcelain is shown through the application of a sputtered YSZ thin film. It is presumed that the strengthening mechanism is due to modification of surface flaws and/or surface residual stress by the applied thin film. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2007