Development of Biocompatible Fe-Pt Based Magnetic Materials

生物相容性铁铂基磁性材料的开发

• 批准号: 11555178
• 负责人: NAKAYAMA Takafumi
• 金额: $ 4.86万
• 依托单位: The Research Institute for Electric and Magnetic Materials(RIEMM)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555178/
• 关键词: Fe-Pt based alloy; Ordered phase alloy; Permanent magnet; soft magnetic properties; Corrosion performance; Adaptability to a living body; 永久磁石; 規則相合金; 最大エネルギー積; 精密鋳造法; 歯科補綴物; 吸引力; 磁場解析; 規則性相合金

From previous research results of Fe-Pt based permanent magnets, this magnet alloy was found to have the advantages of corrosion resistance, castability, magnetic properties and surface roughness, and so, desirable to applications as prosthesis. In order to apply this alloy clinically, structures with excellent biocompatibility and magnetic properties should be developed. Then, in this project, we investigated magnet structures in which permanent magnet and keeper consist of Fe-Pt alloys, with respect to magnetic properties, corrosion resistance and castability. Structures in which keeper consists of corrosion resistive stainless steel were also investigated. Fe-Pt alloys with low Pt compositions, cast in a mold with high heat conductivity and solution treated, show excellent soft magnetic and electrochemical properties as keeper materials. In order to obtain the optimized maximum attractive force between the Fe-Pt based permanent magnet and Pt-rich Fe-Pt alloy keeper, magnetic field analysis was performed, resulted in the optimized structure consisted of a circular-shaped permanent magnet quadrapole magnetized in the direction along the thickness and a keeper with a diameter larger than that of a permanent magnet. The magnet structure with Pt-rich Fe-Pt alloy keeper is found to have higher corrosion resistivity than the case of stainless keeper. Investigation of minor element addition effect shows that light element addition promotes finer crystal grain structures and improves workability and mechanical properties. Summarized research results in this project is that the magnet structure in which both permanent magnet and keeper consist of Fe-Pt alloys with excellent electrochemical properties is suggested to have high biocompatibility and the possibility of clinical application.

从以往的研究结果来看，Fe-Pt基永磁合金具有耐腐蚀性、可铸造性、磁性能和表面粗糙度等优点，因此，作为假体是理想的。为了使这种合金在临床上得到应用，需要开发具有良好生物相容性和磁性能的结构。然后，在这个项目中，我们研究了永磁体和衔铁由Fe-Pt合金组成的磁体结构，在磁性能，耐腐蚀性和可铸造性方面。还研究了由耐腐蚀不锈钢组成的衔铁的结构。低Pt含量的Fe-Pt合金在高导热率的模具中铸造并固溶处理后，作为衔铁材料显示出优异的软磁性能和电化学性能。为了获得Fe-Pt基永磁体与富铂Fe-Pt合金衔铁之间的最大吸引力，进行了磁场分析，得到了由沿厚度方向沿着磁化的圆形永磁体四极和直径大于永磁体直径的衔铁组成的优化结构。富铂铁铂合金衔铁的磁体结构比不锈钢衔铁具有更高的耐腐蚀性。微量元素的添加效应研究表明，微量元素的添加促进了晶粒细化，改善了加工性能和力学性能。本项目总结的研究结果表明，永磁体和衔铁均由电化学性能优异的Fe-Pt合金组成的磁体结构具有较高的生物相容性和临床应用的可能性。

项目成果

相田 光治朗: "磁性ステンレス鋼の歯科鋳造に関する基礎的検討-埋没材について-"日本磁気歯科学会雑誌. 8巻・1号. 28-34 (1999)

会田小次郎：“磁性不锈钢牙科铸造的基础研究 - 关于包埋材料 -” 日本磁性牙科学会杂志，第 8 卷，第 1. 28-34 期（1999 年）。

菅野太郎: "歯科鋳造による白金鉄系磁石合金と磁性ステンレス鋼の可撤式クラウン・ブリッジへの応用"Quintessence of Dental Technology. Vol.25・No.3. 19-26 (2000)

菅野太郎：“铂铁磁性合金和磁性不锈钢在牙科铸造中的应用”Quintessence of Dental Technology Vol.25・No.3（2000）。