【公開日：2023.08.01】【最終更新日：2023.05.26】
課題データ / Project Data
課題番号 / Project Issue Number
22KU0035
利用課題名 / Title
Magnetostrictive of Magnetorheologicai Foam for Soft Force Sensor
利用した実施機関 / Support Institute
九州大学 / Kyushu Univ.
機関外・機関内の利用 / External or Internal Use
外部利用/External Use
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）次世代ナノスケールマテリアル/Next-generation nanoscale materials（副 / Sub）-
キーワード / Keywords
Magnetic Foam,Iron Particles,Nickel Zinc Ferrite Nanoparticles,Hematite Nanoparticles,Distribution
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
Nur Azmah binti Nordin
所属名 / Affiliation
Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
赤嶺大志
利用形態 / Support Type
（主 / Main）技術補助/Technical Assistance（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
KU-013：キセノンプラズマ集束イオンビーム加工・走査電子顕微鏡複合機
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
The samples were magnetic foams known as magnetorheological (MR) foams, contained of iron particles in micron-size and nanoparticles as additives in the MR foams. There are three types of MR foams which are MR foam without additives, MR foam with 3 and 5wt.% of hematite (Fe2O3) and MR foam with 3 and 5wt.% of NiZnFerrite (NiZnFe2O4). The purpose of the characterizations was to observe the distribution of the additives; Fe2O3 and NiZnFe2O4 among the iron particles in the MR foams. It was expected to get clear observations on the micrograph and could differentiate between micron-size iron particles and nanoparticles size of additives; either Fe2O3 or NiZnFe2O4. The observation also contained of low and high magnifications.
実験 / Experimental
The fabrication MR foams with different concentrations of NiZnFe2O4 and Fe2O3 nanoparticles (1, 2, 3, 4 and 5 wt.%) were done by using PU as a matrix material. The samples were prepared separately and underwent magnetostrictive test. Second batch of samples was prepared to ensure the consistency of magnetostrictive results. Basically, total samples are 11 including reference sample which is MR foam without the additives. However, only few samples selected for the SEM characterisations as highlighted in the suammry.
結果と考察 / Results and Discussion
Based on the SEM images, there were unexpected findings on the observations which need to be further check, discussed and clarify with the student and team. Does not meet the expectation, the nano-additives exhibited in two sizes which were very small (nanometer) and distributed among the CIPs, while the other once were extremely large in micron-size and even larger than the CIPs (3-6 micronmeter). This showed that the nanoparticles might be agglomerated unpleasantly during the fabrication of MR foams with the additives. It can be seen in Figure 1, as some bigger particles are exhibited in irregular shapes. Thus, the primary role of the nano-additives in the MR foams to enhance the magnetostrictive of the material might be ambiguous. Perhaps the current magnetostrictive results that added by both additives were due to the mixed particles sizes and not only on the nano-size particles. Nevertheless, the exact nano-size particles were difficult to be observed in these SEM images due to charging of the matrix of MR foam which is polyurethane foam during further magnified of the observed areas. Besides, the EDX analysis also showed that the expected elements which were Fe, O, Ni, Zn, designated for NiZnFe2O4 and Fe3O2 respectively were detected on both smaller and larger size of the particles. Thus, the EDX findings were tally with the SEM observation.
図・表・数式 / Figures, Tables and Equations
Table. 1
Figure 1. SEM images of the MR foam with 3 wt.% of Fe2O3
Figure 2. SEM images of the MR foam with 3 wt.% of NiZnFe2O4 nanoparticles
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件