Surface properties of Al2O3-YSZ ceramic composites modified by a combination of biomimetic coatings and electric polarization.
Surface properties of Al2O3-YSZ ceramic composites modified by a combination of biomimetic coatings and electric polarization.
复制标题
仿生涂层和电极化相结合改性的 Al2O3-YSZ 陶瓷复合材料的表面性能。
DOI：
10.1016/j.apsusc.2012.01.038
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发表时间：
2012
期刊：
影响因子：
6.7
通讯作者：
Yamashita K.
中科院分区：
文献类型：
--
作者：
Nagai A;Ma C;Kishi S;Inuzuka M;Nakamura M;Horiuchi N;Nishio K;Yamashita K.
含氧化铝的氧化钇稳定的氧化锆复合材料（Al-YSZ）具有比YSZ更高的弯曲强度，尽管Al-YSZ不能与骨组织直接结合。为了拓展Al-YSZ在生物医学领域的应用，本研究对Al-YSZ进行表面改性以提高其生物活性。采用交替浸泡技术和电极化处理相结合的方法对Al-YSZ进行了仿生涂层。初始Al-YSZ烧结圆片的晶相被归属为四方ZrO 2和α-Al 2 O3相。使用复阻抗和热刺激去极化电流测量极化处理的电性能进行了分析。研究结果表明，Al-YSZ中由于Al 2 O3的加入，极化后的Al-YSZ中的电荷存储量减少，而仿生涂层法在极化后的Al-YSZ上沉积的磷酸钙膜比未极化的膜厚。涂层方法将适用于生物材料的复杂几何形状。因此，极化铝-钇稳定氧化锆制造使用交替浸泡过程中，预计是有用的生物材料下的承重条件。
Alumina-containing yttria-stabilized zirconia composite (Al-YSZ) has a higher flexural strength than YSZ, although Al-YSZ cannot directly bond with bone tissues. To expand the biomedical applications of Al-YSZ, new surface modifications were investigated to improve the bioactivity in the present study. The combination of a biomimetic coatings method using an alternate soaking technique and electric polarization treatment was performed on Al-YSZ. The crystalline phases of the starting Al-YSZ sintered disks were assigned to tetragonal ZrO2and α-Al2O3phases. The analyses of the electrical properties were carried out using complex impedance and thermally stimulated depolarized current measurements for polarization treatments. Our results indicate that the stored charges in Al-YSZ via polarization decreased in YSZ, because of the added alumina, while the calcium phosphate film deposited by the biomimetic coatings method on polarized Al-YSZ was observed to be thicker than the non-polarized film. The coating method would be suitable for the complex geometry of biomaterials. As a result, polarized Al-YSZ fabricated using an alternate soaking process is expected to be useful as a biomaterial under load-bearing conditions.