Yang Yunzhi, Ong Joo L, Tian Jiemo
Department of Restorative Dentistry, Division of Biomaterials, MSC 7890, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA.
Biomaterials. 2003 Feb;24(4):619-27. doi: 10.1016/s0142-9612(02)00376-9.
ZrO(2) (4% CeO(2)) and ZrO(2) (3% Y(2)O(3)) coatings were deposited on titanium (Ti) and CoCrMo implants using plasma spraying and the adhesive, morphological and structural properties of the plasma-sprayed coatings were evaluated. Characterization of these coatings was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), surface roughness, hardness, and adhesive strength. XRD patterns showed that both the coatings appeared to be primitive tetragonal phase. SEM observations showed that both the ZrO(2) coatings appeared to be rough, porous and melted. The cross-section surface morphology of the coatings, coating-substrate interfaces and substrates without acid etching was very dense and smooth. After acid etching, as compared to the dense ZrO(2) coating-CoCrMo substrate interfaces, the thin gaps appeared within the ZrO(2) coating-Ti substrate interfaces. It is suggested that plasma spraying probably formed an amorphous Ti layer in the coating-Ti substrate interface that can be removed by acid etching. The average surface roughness of ZrO(2) (3% Y(2)O(3)) and ZrO(2) (4% CeO(2)) coatings was correlated to the starting powder size and substrates. No significant difference between the hardness of all coatings and substrates was observed. The adhesive strengths of ZrO(2) (4% CeO(2)) coating to Ti and CoCrMo substrates were higher than 68MPa and significantly greater than that of ZrO(2) (3% Y(2)O(3)) coatings.
采用等离子喷涂技术在钛（Ti）和钴铬钼植入物上沉积了ZrO₂（4% CeO₂）和ZrO₂（3% Y₂O₃）涂层，并对等离子喷涂涂层的附着力、形态和结构性能进行了评估。使用X射线衍射（XRD）、扫描电子显微镜（SEM）、表面粗糙度、硬度和附着力对这些涂层进行了表征。XRD图谱显示，两种涂层均呈现原始四方相。SEM观察表明，两种ZrO₂涂层均显得粗糙、多孔且有熔化现象。未进行酸蚀刻的涂层、涂层-基体界面和基体的横截面表面形态非常致密且光滑。酸蚀刻后，与致密的ZrO₂涂层-钴铬钼基体界面相比，ZrO₂涂层-钛基体界面出现了细小间隙。有人认为，等离子喷涂可能在涂层-钛基体界面形成了一层非晶态钛层，该层可通过酸蚀刻去除。ZrO₂（3% Y₂O₃）和ZrO₂（4% CeO₂）涂层的平均表面粗糙度与起始粉末尺寸和基体有关。所有涂层和基体的硬度之间未观察到显著差异。ZrO₂（4% CeO₂）涂层与钛和钴铬钼基体的附着力高于68MPa，且明显大于ZrO₂（3% Y₂O₃）涂层的附着力。
