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ID 110121
タイトル別表記
MRIに適合した生体医療用Au-Ta合金とAu-Nb合金の体積磁化率設計と硬さ
著者
乾, 志帆子 徳島大学大学院口腔科学教育部(口腔科学専攻)
キーワード
Volume magnetic susceptibility
Vickers hardness
Phase constitution
Heat treatment
MRI compatibility
資料タイプ
学位論文
抄録
The volume magnetic susceptibility (χv) and Vickers hardness (HV) of Au–Ta and Au–Nb alloys were investigated for use as magnetic resonance imaging (MRI)-compatible alloys for biomedical applications. χv of the Au–Ta alloys did not depend on the phase constitution but did depend on the alloy composition. Therefore, heat treatment hardly affected χv of the Au–Ta alloys, and only alloys with Ta contents near 15 were possibly MRI-compatible. In contrast, χv of the Au–Nb alloys depended on the phase constitution. Therefore, both the alloy composition and heat treatment can be used to widely control χv of Au–Nb alloys, and Au–xNb alloys (x≥6.8) can be made MRI-compatible by optimizing χv using heat treatment. HV of the Au–15Ta alloy was smaller than that of pure Ti even after heat treatment, whereas HV of the MRI-compatible Au–Nb alloys was possibly higher than that of pure Ti after heat treatment. The saturated χv values of the Au–Nb alloys after heat treatment at 800 °Care compatible with the hypothesis that χv of an alloy is the average χv of each phase of the alloy based on the rule of mixtures. This hypothesis supports the tailoring of χv by controlling the alloy composition and heat treatment.
掲載誌名
Biomedical Physics & Engineering Express
ISSN
20571976
出版者
IOP Publishing
3
1
開始ページ
015025
発行日
2017-02-10
備考
内容要旨・審査要旨・論文要約の公開:
内容要旨:LID201704281010.pdf
審査要旨:LID201704281011.pdf
論文要約:LID201704281012.pdf
本論文は,著者Shihoko Inuiの学位論文として提出され,学位審査・授与の対象となっている。
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
jpn
著者版フラグ
その他
文科省報告番号
甲第3080号
学位記番号
甲口第423号
学位授与年月日
2017-03-23
学位名
博士(歯学)
学位授与機関
徳島大学
部局
歯学系