Development of low elastic modulus titanium alloys forbone substitution

低弹性模量骨替代钛合金的研制

• 批准号: 22592187
• 负责人: SHIRAISHI Takanobu
• 金额: $ 2.58万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22592187/
• 关键词: 生体材料; チタン合金; ヤング率; ビッカース硬さ; 結晶構造; 密度; 耐食性; 弾性率; 剛性率

It is important for load-bearing metallic biomaterials to satisfy various requisites, such as high mechanical strength, high corrosion resistance and low elastic moduli similar to those of a living cortical bone. In the present study, (Ti-60Zr)-X and (Ti-70Zr)-X (X = 1 at.% Pd or Pt) ternary alloys were prepared and their density, Young’s modulus, shear modulus, Vickers hardness and crystal structure were analyzed. The addition of a small amount of noble metals (Pd, Pt) markedly increased Young’s modulus, shear modulus and Vickers hardness. Density also considerably increased with the addition of Pd and Pt. X-ray diffraction study showed that the above mentioned significant change in mechanical properties were caused by formation of a ω-phase in addition to α-phase in the as-cast alloy ingots. In summary, the alloying addition of a small amount of noble metals (Pd, Pt) to Ti-Zr alloys is not recommended from the viewpoint of the development of low elastic modulus biomedical materials for bone substitution.

承载金属生物材料必须满足各种要求，如高机械强度、高耐腐蚀性和类似于活体皮质骨的低弹性模量。本研究制备了(Ti-60Zr)-X和(Ti-70Zr)-X(X=1at.%Pd或Pt)三元合金，并对其密度、杨氏模量、剪切模量、维氏硬度和晶体结构进行了分析。少量贵金属(Pd、Pt)的加入显著提高了材料的杨氏模量、剪切模量和维氏硬度。随着Pd和Pt的加入，密度也显著增加。X射线衍射研究表明，上述力学性能的显著变化是由于铸态合金铸锭中除ω相外还生成了α相所致。综上所述，从开发低弹模骨替代生物医用材料的角度来看，不建议在钛-锆合金中添加少量贵金属(Pd、铂)。

项目成果

研磨粗さがhybrid型コンポジットレジンビューティフィルIIの色彩と光沢に及ぼす影響

抛光粗糙度对杂化复合树脂Beautyfil II颜色和光泽的影响

• 发表时间: 2010
• 作者: 細矢由美子;白石孝信
• 通讯作者: 白石孝信

長崎大学大学院医歯薬学総合研究科ホームページ

长崎大学生物医学科学研究生院主页