Fabrication of metallic implants with porous surface by shock compaction method

冲击压实法制备多孔表面金属植入物

• 批准号: 10680797
• 负责人: CHIBA Akira
• 金额: $ 2.11万
• 依托单位: KUMAMOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680797/
• 关键词: Shock wave; Bio-materials; Porous materials; Implant; artificial bone; 衝撃圧縮; 人口骨

Medical porous implants have been shown to lead to higher bone/metal shear strength than other types of fixation. Medical implants coated with porous titanium were fabricated by cylindrical explosive compaction method. The feature of this experiment is that Ti powders were easily bonded, without using the organic binder in commercial powder metallurgy process. The central axis of the container has a titanium core with 5mm diameter. Porous surface Ti implants were fabricated using Ti powders having three particle size ranges, i.e. 1mm, 610μm, 310μm in average diameters, which are produced by the plasma rotating electrode process and Mg powder with diameter 500μm. This mixed powder was set around Ti rod. The explosive compaction was performed by using the water as a pressure medium and then by heating the specimen, Mg metal was evaporated.The obtained results are as follows; (1) The optimum volume ratio of Ti and Mg was 7:3.(2) To get optimum surface porosity diameter (250μm), the diameters Ti powder must be from 610μm to 1mm. The porosity of the surface increases with increasing the diameter of Ti powder and the surface porosity is attained to be 21.1% when using Ti powder with 1mm diamer.(3) The obtained strength of bonding interface between the core and powders is higher than shear strength of human bone (60MPa).Totally the surface of implant produced in this experiment shows good strength and porous structure for favourable to bone tissue growth.

医用多孔植入物已被证明比其他类型的固定具有更高的骨/金属剪切强度。采用柱状爆炸压实法制备了多孔钛涂层医用植入物。本实验的特点是在工业粉末冶金过程中，不使用有机粘结剂，钛粉容易粘结。容器的中轴线为直径5 mm的钛芯。采用等离子旋转电极法制备了平均粒径分别为1 mm、610μm、310μm的钛粉和直径为500μm的镁粉，在钛棒周围制备了多孔表面钛种植体。用水作为压力介质进行爆炸压实，然后加热试件，蒸发金属镁，得到如下结果：(1)钛和镁的最佳体积比为7：3。(2)要获得最佳的表面气孔直径(250μm)，钛粉的直径必须在610μm~1 mm之间。随着钛粉直径的增大，种植体表面孔隙率增加，当钛粉直径为1 mm时，表面孔隙率达到21.1%。(3)所获得的牙体与骨粉之间的粘结界面强度高于人骨的剪切强度(60 Mpa)。

项目成果

千葉 昴: "structure and strength of bonding interface in explosively-welded Ti/steel clads"Impact Response of Materials & Structures, Oxford University Press. 289-294 (1999)

Subaru Chiba：“爆炸焊接钛/钢包层中的粘合界面的结构和强度”材料与结构的冲击响应，牛津大学出版社 289-294 (1999)。

友重 竜一: "High-temperature-shock compaction of ceramics/silicide composites produced by combution synthesis" J.Materials Processing Technology. 85. 100-104 (1999)

Ryuichi Tomoshige：“通过燃烧合成生产的陶瓷/硅化物复合材料的高温冲击压实”J.材料加工技术。85. 100-104 (1999)。

田中 秀和: "自己伝播高温合成・爆発衝撃固化法によるTiC/Ti4Al2C2/TiAl系傾斜組成材料の作製" 火薬学会誌. 59・4. 153-159 (1998)

Hidekazu Tanaka：“通过自蔓延高温合成和爆炸冲击凝固法制备TiC/Ti4Al2C2/TiAl梯度复合材料”日本炸药学会杂志59・4（1998）。

千葉 昴: "Fabrication of porous titanium composite for medical implants by explosive compaction"Proc.of 8^<th> Int.Conf.on Processing and Fabrication of Advanced Materials. (in print). (2000)

Subaru Chiba：“通过爆炸压实制造医用植入物的多孔钛复合材料”Proc.of 8^<th>Int.Conf.on Advanced Materials 加工和制造（2000 年印刷）。

千葉 晶: "Structure and strength of bonding interface in explosively-welded Ti/steel clads" Proc.of3rd International Symposium on Impact Engineering‘98.(印刷中). (1999)

Akira Chiba：“爆炸焊接钛/钢包层中的结合界面的结构和强度”，第三届冲击工程国际研讨会论文集（1999 年）。