講演・口頭発表等 - 井藤　幹夫

Fabrication of diamond particle dispersed metal matrix composites by spark plasma sintering (SPS) for high thermal conductive materials 招待 国際会議

Mikio Ito

The 13th International Conference on Nanostructures, Nanomaterials and Nanoengineering, ICNNN 2024  2024年11月  Science and Engineering Institute

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Diamond particle dispersed metal matrix composites (MMCs) were fabricated by spark plasma sintering (SPS) in order to provide high performance thermal management materials. In the case of Al matrix composites, the samples were consolidated in continuous solid-liquid co-existent state by SPS process from the mixture of diamond powders, pure Al powders and Al-5mass%Si alloy powders. the microstructures and thermal conductivities of the composites obtained were examined. These composites were all well densified by heating at a temperature range between 798K and 876K for 1.56ks during SPS process. No reaction at the interface between the diamond particle and the Al matrix was observed by scanning electron microscopy for the composites fabricated under the sintering condition employed in this study. The relative packing density values of the diamond–Al composites obtained were 99% or higher in a volume fraction range of diamond between 45vol.% and 50cvol.%. Thermal conductivity of the diamond-Al composite containing 50vol.% diamond reached 552 W/mK, approximately 95% of the theoretical thermal conductivity estimated by using Maxwell-Euchen’s equation.

Densification of thermoelectric β-FeSi2 by directly applied current sintering process 招待 国際会議

Mikio Ito

Powder Metallurgy World Congress & Exhibition, World PM 2024  2024年10月  Japan Powder Metallurgy Association, Japan Society of Powder and Powder Metallurgy

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The thermoelectric β-FeSi2 powder, was sintered by modified pulsed electric current sintering (PECS) using graphite punches and an insulating quartz glass die. The sample powders were heated by directly applied current and their sintering behaviors were compared to those of the samples sintered by the conventional PECS (using graphite punches and a graphite die). During the heating in the quartz die, the transformation from mechanically alloyed metallic Fe-Si powder to the semiconductive β-FeSi2 phase occurred at a temperature lower than when sintered by the conventional PECS. After the transformation, the shrinkage of compact became larger than that of the sample sintered by the conventional method. The sample sintered by this modified PECS process showed the thermal conductivity smaller than the sample prepared in the conventional process because of its finer microstructure due to the rapid densification, resulting in lager figure of merit.

SPS装置を用いた直接通電による高効率焼結 招待

井藤幹夫

嶺南材料研究会  2021年12月  福井大学附属国際原子力工学研究所

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SPSを用いた新規な直接通電焼結プロセスを提案，導電性粉末の緻密化促進効果および省電力化効果など，これまでに得られた研究成果について報告した．

Thermoelectric properties of β-FeSi2 prepared by directly applied pulsed electric current sintering 招待 国際会議

Mikio Ito

Asia Pacific Society for Materials Research 2021 Annual Meeting (APSMR 2021 Annual Meeting)  2021年8月  APSMR 2021 Annual Meeting Committee

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As an electrically conductive powder, thermoelectric β-FeSi2 powder, was sintered by modified pulsed electric current sintering (PECS) using graphite punches and an insulating quartz glass die. These powders were heated by directly applied current and their sintering behaviors were compared to those of the samples sintered by the conventional PECS (using graphite punches and a garphite die). During the heating in the quartz die, the transformation from mechanically alloyed metallic Fe-Si powder to the semiconductive β-FeSi2 phase occurred at a temperature lower than when sintered by the conventional PECS. After the transformation, the shrinkage of compact became larger and the density of a sintered body was higher as compared to those of the sample sintered by the conventional method. The sample sintered by this modified PECS process showed the thermal conductivity smaller than the sample prepared in the conventional PECS process because of its finer microstructure due to the rapid densification. On the other hand, the electrical resistivity and the Seebeck coefficient of this sample were slightly reduced and enhanced, respectively, resulting in the significantly lager figure of merit as compared to the conventionally sintered sample.

直接通電焼結プロセスを用いた導電性粉末の高効率焼結

井藤幹夫

第24回通電焼結研究会 

Rapid and energy-saving densification of metallic and semiconducting powders by using directly applied current sintering 国際会議

Mikio Ito

The 4th International Conference on Functional Materials and Metallurgy (ICFMM 2019) 

Rapid densification of electrically conductive powders by Joule heating in directly applied current sintering 国際会議

Mikio Ito

The 8th International Conference on Nanostructures, Nanomaterials and Nanoengineering (ICNNN 2019) 

Preparation of heterogeneous β-FeSi2/Si composites synthesized by eutectoid decomposition and their thermoelectric properties 国際会議

Mikio Ito

International Conference on Material Science and Engineering. (Materials Science- 2019) 

Rapid and energy-saving sintering of electrically conductive powders by directly applied current heating 国際会議

Mikio Ito

2019 4th International Conference on Smart Materials Applications (ICSMA 2019) 

SPS成形したダイヤモンド粒子分散Cu基複合材料の放熱特性に及ぼすB添加の影響

水内　潔，井上漢龍，上利泰幸，田中基博，武内　孝，谷　淳一，川原正和，巻野勇喜雄，井藤幹夫

第23回通電焼結研究会 

Sintering of electrically conductive powders by directly applied current heating 国際会議

Mikio Ito

The International Conference on Nanostructures, Nanomaterials and Nanoengineering (ICNNN 2018) 

Effects of P doping on the thermoelectric performance of heterogeneous β-FeSi2/Si composites 国際会議

Mikio Ito, Fafah Liana, Masatoshi Takeda

The 9th International Conference on PROCESSIMG & MANUFACTURING OF ADVANCED MATERIALS (THERMEC 2018) 

Thermoelectric performance of heterogeneous β-FeSi2/Si composites synthesized by eutectoid decomposition 国際会議

Mikio Ito

The 2018 5th Global Conference on Polymer and Composite Materials (PCM 2018) 

Synthesis of thermoelectric materials by directly applied current sintering process 国際会議

Mikio Ito

The 8th International Conference on Key Engineering Materials (ICKEM 2018) 

共析変態を利用したβ-FeSi2/Siコンポジット材料の合成と熱電特性

井藤幹夫，ファラリアナ，武田雅敏

第22回通電焼結研究会 

Synthesis of thermoelectric β-FeSi2 via directly applied current sintering 国際会議

Mikio Ito

The 6th Global Conference on Materials Science and Engineering (CMSE 2017) 

Densification behavior and thermoelectric properties of β-FeSi2 synthesized by directly applied current sintering 国際会議

Mikio Ito

International Conference on Frontiers in Materials Processing Applications, Research and Technology, FiMPART’2017 

直接通電による高効率焼結プロセスの開発と熱電変換材料合成への応用

井藤幹夫

同志社大学先端複合材料研究センターコロキウム講演 

SPSを用いた直接通電による導電性粉末焼結体の合成

井藤幹夫

フォーラム「Manufacturing & Creative Knowledge Integration Yard (MACKIY)」 

直接通電焼結におけるβ-FeSi2粉末の焼結挙動

井藤幹夫

第21回通電焼結研究会 

Synthesis of β-FeSi2 by directly applied current sintering and its thermoelectric properties 国際会議

Mikio Ito and Kenta Kawahara

The 8th International Conference on PROCESSIMG & MANUFACTURING OF ADVANCED MATERIALS (THERMEC 2016) 

Thermal conductivity of cubic boron nitride particle dispersed Al matrix composites fabricated by SPS 国際会議

Kiyoshi Mizuuchi, Kanryu Inoue, Yasuyuki Agari, Motohiro Tanaka, Takashi Takeuchi, Jun-ichi Tani, Masakazu Kawahara, Yukio Makino, Mikio Ito

The 8th International Conference on PROCESSIMG & MANUFACTURING OF ADVANCED MATERIALS (THERMEC 2016) 

SPSを用いた直接通電焼結による導電性粉末の固化成型

井藤幹夫

日本セラミックス協会2016年年会サテライトプログラム「焼結の科学と技術」 

SPSにより成形固化したcBN粒子分散型Al基複合材料の熱伝導率に及ぼすcBNのバイモーダルな粒度分布の影響 国際会議

水内　潔，井上漢龍，上利泰幸，田中基博，武内　孝，谷　淳一，川原正和，巻野勇喜雄，井藤幹夫

第20回通電焼結研究会 

Edge-free SPSによるTi3SiC2セラミックスの高配向化

井藤幹夫，西山博基

第20回通電焼結研究会 

SPS法により作製した傾斜機能材料の状態分析－Al2O3/TiとZrO2(3Y)/SUS410Lの比較－

巻野勇喜雄，水内　潔，井藤幹夫

第20回通電焼結研究会 

Densification Behaviors of Electrically Conductive Powders Sintered by Directly Applied Current Heating Process 国際会議

Mikio Ito

The 11th Pacific Rim Conference of Ceramic Societies, PACRIM 11 

パルス通電焼結による低融点金属添加Sm2Fe17N3磁石粉末の固化成形

井藤幹夫

フォーラム「Manufacturing & Creative Knowledge Integration Yard (MACKIY)」 

放電プラズマ焼結法による金属系放熱材料の開発

水内　潔，上利泰幸，杉岡正美，田中基博，武内　孝，谷　淳一，井上漢龍，川原正和，巻野勇喜雄，井藤幹夫

フォーラム「Manufacturing & Creative Knowledge Integration Yard (MACKIY)」 

Thermal Properties of cBN Particle Dispersed Al Matrix Composites Fabricated by SPS 国際会議

Kiyoshi Mizuuchi, Kanryu Inoue, Yasuyuki Agari, Masami Sugioka, Motohiro Tanaka, Tahashi Takeuchi, Jun-ichi Tani, Masakazu Kawahara, Yukio Makino and Mikio Ito

Japan-Russia Workshop on Advanced Materials Synthesis Process and Nanostructure 

Characterization of the interfaces in diamond/metal composites 国際会議

Yukio Makino, Kiyoshi Mizuuchi, Yasuyuki Agari and Mikio Ito

Japan-Russia Workshop on Advanced Materials Synthesis Process and Nanostructure 

Synthesis of thermoelectric Mg2Si polycrystals by directly applied current heating 国際会議

Mikio Ito and Kenta Kawahara

熱電変換材料のSPS合成

井藤幹夫

京都市産業技術研究所・講演会 

SPSを用いた複合磁石材料の固化成形

井藤幹夫

フォーラム「Manufacturing & Creative Knowledge Integration Yard (MACKIY)」 

パルス通電焼結法を用いた複合磁石材料の合成

井藤幹夫，常深　浩，竹本　誠

第18回通電焼結研究会 

SPS成形したAl/ダイヤモンド複合材料の熱物性に及ぼすダイヤモンドのバイモーダルな粒度分布の影響

水内　潔，井上漢龍，上利泰幸，杉岡正美，田中基博，武内　孝，谷　淳一，川原正和，巻野勇喜雄，井藤幹夫

第18回通電焼結研究会 

放電プラズマ焼結（SPS）法で得られた透光性アルミナ焼結体の微細組織の比較

川原正和，安野拓也，白澤　融，井藤幹夫，巻野勇喜雄，向後保雄

第18回通電焼結研究会 

Effect of bimodal distribution of diamond particle size on thermal conductivity of Al/diamond composite fabricated by SPS 国際会議

Kiyoshi Mizuuchi, Kanryu Inoue, Yasuyuki Agari, Masami Sugioka, Motohiro Tanaka, Tahashi Takeuchi, Jun-ichi Tani, Masakazu Kawahara, Yukio Makino and Mikio Ito

The 7th International Conference on PROCESSIMG & MANUFACTURING OF ADVANCED MATERIALS (THERMEC 2013) 

SPSによる熱電材料の合成

井藤幹夫

フォーラム「Manufacturing & Creative Knowledge Integration Yard (MACKIY)」 

粉末冶金プロセスによる熱電変換材料の微細組織制御と高性能化

井藤幹夫

秋田熱電材料研究会講演会，「エネルギー材料設計におけるプロセスと不定比性制御の役割」 

放電プラズマ焼結（SPS）法で作製した高透光性アルミナ焼結体の微細組織観察

川原正和，巻野勇喜雄，白澤　融，安野拓也，井藤幹夫，向後保雄

第17回通電焼結研究会 

透光性アルミナのSPS合成と微細構造およびその問題点

巻野勇喜雄，川原正和，安野拓也，井藤幹夫

第17回通電焼結研究会 

直接通電焼結法による熱電変換材料の合成

井藤幹夫，常深　浩，荒木敬太

第17回通電焼結研究会 

持続型固‐液共存状態を利用してSPS成形したAl/AlN複合材料の熱物性

水内　潔，井上漢龍，上利泰幸，長岡　亨，杉岡正美，田中基博，武内　孝，谷　淳一，川原正和，巻野勇喜雄，井藤幹夫

第17回通電焼結研究会 

導電性粉末のSPS焼結における通電の効果

井藤幹夫

第16回SPS研究会 

放電プラズマ焼結（SPS）法により作製した透光性アルミナ焼結体の微細組織観察

川原正和，貝山由樹，安野拓也，巻野勇喜雄，井藤幹夫，向後保雄

粉体粉末冶金協会平成23年度秋季大会 

Thermoelectric Properties and Densification Behavior of SrTiO3/TiB2 Composites 国際会議

Mikio Ito and Naoki Hasegawa

The 7th International Conference on PROCESSIMG & MANUFACTURING OF ADVANCED MATERIALS (THERMEC 2013) 

Thermal Properties of Al/Diamond Composites Fabricated in Continuous Solid-Liquid co-Existent State by SPS 国際会議

K. Mizuuchi, K. Inoue, Y. Agari, Y. Morisada, M. Sugioka, M. Tanaka, T. Takeuchi, J. Tani, M. Kawahara, Y. Makino and Mikio Ito

The 7th International Conference on PROCESSIMG & MANUFACTURING OF ADVANCED MATERIALS (THERMEC 2011) 

TiB2を添加したSrTiO3粉末の焼結挙動

井藤幹夫

第15回SPS研究会 

SPSプロセスによるn型SrTiO3系熱電変換酸化物の合成

井藤幹夫

第4回パルス通電懇話会 

SPSを利用したSrTiO3系熱電変換材料の低温迅速合成

井藤幹夫

第14回SPS研究会 

溶液プロセスを利用した熱電酸化物多結晶焼結体の微細構造制御と高性能化プロセスの開発

井藤幹夫，柳楽智也，勝山　茂

粉体粉末冶金協会平成21年度秋季大会 

錯体重合法およびパルス通電焼結法を利用したSrTiO3系熱電変換材料の合成

井藤幹夫

粉体粉末冶金協会平成20年度秋季大会 

錯体重合法およびSPSによる熱電変換酸化物の合成とその熱電特性

井藤幹夫

高温学会平成19年春季大会シンポジウム 

熱電変換材料合成における放電プラズマ焼結利用の利点と問題点

井藤幹夫

粉体粉末冶金協会電磁プロセス委員会平成16年講演会/平成16年第1回EMAP研究会(共催) 

MAによる微粒子分散コンポジット熱電変換材料の開発

勝山　茂，井藤幹夫，永井　宏

粉体粉末冶金協会平成14年度秋季大会