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ID 110121
Title Alternative
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
Author
Inui, Shihoko Tokushima University
Keywords
Volume magnetic susceptibility
Vickers hardness
Phase constitution
Heat treatment
MRI compatibility
Content Type
Thesis or Dissertation
Description
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.
Journal Title
Biomedical Physics & Engineering Express
ISSN
20571976
Publisher
IOP Publishing
Volume
3
Issue
1
Start Page
015025
Published Date
2017-02-10
Remark
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
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
jpn
TextVersion
その他
MEXT report number
甲第3080号
Diploma Number
甲口第423号
Granted Date
2017-03-23
Degree Name
Doctor of Dental Science
Grantor
Tokushima University
departments
Oral Sciences