EVALUATION OF MECHANICAL CHARACTERISTICS OF BIO-CERAMIC FUNCTIONALLY GRADIENT COATING IMPLANT

生物陶瓷功能梯度涂层植入物的机械特性评估

• 批准号: 11650073
• 负责人: SHIBANO Jun-ichi
• 金额: $ 2.05万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650073/
• 关键词: Biomaterials; Ceramics; Functionally Gradient Materials; Residual Stress; X-ray Method; Plasma Spraying; Three-point Bending; Delamination; プラスマ溶射

The purpose of research is to evaluate the mechanical characteristics of a bio-ceramic functionally gradient coating implant from a point of view of residual stress and adhesion strength. The bio-ceramic functionally gradient coating specimen was made using atmospheric plasma-spray processing. Four layers in which the volume mixture ratio of the hydroxyapatite and the titanium gradually change were subsequently coated on the surface of titanium substrate. The thickness of each layer was 20μm. The mechanical characteristics of the functionally gradient coating specimen were compared with those of the specimen coated only with hydroxyapatite.(1) The residual stress generated in the coating layer was measured using X-ray diffraction method. The characteristic X-ray of Mo-Kα was used. The (002) lattice plane of hydroxyapatite was selected in this experiment. The following results were confirmed.(a) Compressive residual stress of 224MPa existed in the functionally gradient coating layer.(b) … More Compressive residual stress of 295MPa in the coating layer of the specimen coated only with hydroxyapatite was measured.(c) The compressive residual stress in the coating layer of the bio-ceramic coating specimen decrease when using a functionally gradient coating.(2) The adhesion strength of the coating layer was evaluated using three-point bending method. The bending specimen of 60×10×2mm^3 was coated with hydroxyapatite and titanium in the same manner as state above. The span for three-point bending was 42mm. The specimen was loaded until the maximum deflection became 3mm. The size of delaminated area of coating layer was measured. The following results were confirmed.(a) The delaminated areas of the functionally gradient coating specimen and the specimen coated only with hydroxyapatite were 4.6mm^2 and 10.9mm^2, respectively.(b) The functionally gradient coating specimen is superior in the adhesion strength of coating layer in comparison with the specimen coated only with hydroxyapatite. Less

研究的目的是评估从残留应力和粘合强度的角度，生物陶瓷功能梯度涂层植入物的机械特性。生物陶瓷功能梯度涂料的样品是使用大气等离子体涂抹加工制成的。随后将羟基磷灰石和钛的体积混合比逐渐变化的四层覆盖在钛底物的表面上。每一层的厚度为20μm。将功能梯度涂层试样的机械特性与仅用羟磷灰石涂层的试样的机械特性进行了比较。（1）使用X射线衍射方法测量了涂层中产生的残留应力。使用MO-Kα的特征X射线。在此实验中选择了羟磷灰石的（002）晶格平面。确认了以下结果。（a）在功能梯度涂层层中存在224MPa的压缩残留应力。（b）…在样品的涂层中，仅在羟基磷灰石涂层的涂层中，在羟基磷灰石涂层的涂层中更加压缩残留应力。使用三点弯曲方法评估涂料层的粘附强度。 60×10×2mm^3的弯曲样品用与上述状态相同的方式涂上羟磷灰石和钛。三分弯的跨度为42mm。将样品加载到最大挠度变为3mm。测量了涂料层的分层面积的大小。确认了以下结果。（a）功能梯度涂层样品的分层区域，并且仅用羟磷灰石覆盖的样品分别为4.6mm^2和10.9mm^2。（b）功能梯度涂料标本在与Hydroxy的涂层相比仅在涂层的粘附层中优越。较少的

项目成果

Jun-ichi SHIBANO et al: "Effect of Bond Coat on Residual Stress Generated in the Hydroxyapatite Coating Implant"Proc. 6th Intl. Conf. on Residual Stresses. 693-700 (2000)

Jun-ichi SHIBANO 等人：“粘合涂层对羟基磷灰石涂层植入物中产生的残余应力的影响”Proc。

Jun-ichi SHIBANO,他2名: "Effect of Bond Coat on Residual Stress Generated in the Hydroxyapatite Coating Implant"Proc.of 6th Intl.Conf.on residual Stresses. 1. 693-700 (2000)

Jun-ichi SHIBANO 和其他 2 人：“粘合涂层对羟基磷灰石涂层植入物中产生的残余应力的影响”Proc.of 6th Intl.Conf.on 残余应力。

柴野純一 他2名: "HApコーティングインプラントの残留応力に及ぼす中間層の効果"日本機械学会論文集(A編). 65-639. 2246-2251 (1999)

Junichi Shibano 和其他 2 人：“中间层对 HAp 涂层植入物残余应力的影响”，日本机械工程师学会汇刊（ed. A） 2246-2251（1999 年）。

Jun-ichi SHIBANO, 他2名: "Effect of Bond Coat on Residual Stress Generated in the Hydroxyapatite Coating Implant"Proc.of 6th Intl.Conf.on Residual Stresses. 1. 693-700 (2000)

Jun-ichi SHIBANO 等 2 人：“粘合涂层对羟基磷灰石涂层植入物中产生的残余应力的影响”Proc.of 6th Intl.Conf.on Residual Stresses 1. 693-700 (2000)。