巻号一覧
62 巻, 3 号
March
選択された号の論文の9件中1～9を表示しています
- |<
- <
- 1
- >
- >|
研究論文
研究論文
-
木下 俊二, 町田 信也, 重松 利彦2015 年 62 巻 3 号 p. 81-92
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスABSTRACT
A composite of copper chevrel phase (Cu2Mo6S7.8) and sulfur was investigated as positive electrode materials for all-solid-sate lithium-sulfur batteries with an inorganic solid electrolyte (amorphous Li3PS4). The composites of Cu2Mo6S7.8 and sulfur in various mole ratios (Cu2Mo6S7.8 : S = 1 : 1 to 1 : 20) showed high specific capacities in the range of 200 to 480 mAhg−1, which was calculated on the base of the total weights of the composites. Those capacities were two to three times larger than that of the Cu2Mo6S7.8. The reaction mechanisms of the composite as cathode materials were investigated during the discharge process. First of all, only the mixing of Cu2Mo6S7.8 with sulfur caused a structural change of the chevrel phase (type 1) into type 1’ phase and a formation of copper sulfide (CuS). In the initial stage of the discharge process, lithium ions were electrochemically inserted into the type 1’ phase and CuS. The Li+ insertion into the CuS formed LixCuS phase. The newly formed LixCuS continuously reacted with elemental sulfur and changed into CuS and Li2S. This reaction was not electrochemical reaction, however, the generated CuS would be able to electrochemically react with farther lithium ions. This process caused the large electrochemical capacity of the composites. An all-solid-state battery with the composite of Cu2Mo6S7.8 and sulfur (1 : 7 in mole ratio) showed high specific capacity more than 250 mAhg−1 and the capacity was retained even after 30 discharge-charge cycles at 25 ˚C.抄録全体を表示PDF形式でダウンロード (2215K)
特集：粉末冶金プロセスを用いた製造技術と製品評価の新展開
総報
-
伊藤 孝至2015 年 62 巻 3 号 p. 94-
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスPDF形式でダウンロード (156K)
解説
-
近藤 幹夫2015 年 62 巻 3 号 p. 95-100
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスABSTRACT
We have developed the technique of warm compaction using lithium stearate as the die wall lubricant in order to obtain high density, 99 % theoretical or more, by means of a single compaction only. This technique achieves very low ejection force and enjoys epoch-making mass-production. High density is indispensable for a high performance powder metallurgical product. Unfortunately, the unavailability of superior lubricants allowed no compaction at high pressure. We have developed a specific lubricant formed by dispersing lithium stearate in water and succeeded in ultrahigh density powder compaction by means of die wall lubricated warm compaction.抄録全体を表示PDF形式でダウンロード (1310K)
研究論文
-
安達 恭史, 藤木 章2015 年 62 巻 3 号 p. 101-107
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスABSTRACT
This study measured the coefficients of friction on several lubricants for powder metallurgy with horizontally both-way sliding friction tester. We obtained the results that static coefficients of friction on those powder lubricants were from 0.21 to 0.45, and those kinetic coefficients of friction were from 0.13 to 0.25. Furthermore, the relationship between coefficients of friction and ejection pressures on several powder lubricants showed that low kinetic coefficient of friction tended to be low-ejection pressure, on mixed-type lubricants. The relationship between coefficients of friction and green density on them showed that low-static and kinetic coefficients of friction tended to be high-green density.抄録全体を表示PDF形式でダウンロード (1391K) -
長田 稔子, 櫻井 亮輔, 橋川 龍一, 津守 不二夫, 三浦 秀士, 戸田 欽二2015 年 62 巻 3 号 p. 108-113
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスABSTRACT
Metal Injection Molding (MIM) process is suitable for fabricating small parts in large quantity. In this work,relatively large and complex shaped parts were prepared thorough MIM. In order to decrease the deformation of sintered parts, powders of different sizes were mixed. The effect of powder particle distribution and powder loading on the distortion of complex shaped compacts were investigated and evaluated. As smaller the particle size of mixed powder, tap density of powder were decreased. However, sintered density and shrinkage were increased. Although high powder loading increased the viscosity during the injection molding, decreased the shrinkage of sintered compact. From these results, smaller deformation of the large and complex shaped parts could be realized by using smaller particle size of mixed powder and higher powder loading.抄録全体を表示PDF形式でダウンロード (884K) -
伊藤 孝至, 富永 彰2015 年 62 巻 3 号 p. 114-119
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスABSTRACT
Magnesium silicide is a promising eco-friendly thermoelectric material. Its constituent elements are non-toxic and exist in abundance on the earth. To improve thermoelectric performance of the material, reduction of thermal conductivity is required. In this study, we attempted to lower the thermal conductivity of Al–doped Mg2Si by milling of the powder and addition of calcium oxide nanoparticles (CONP). Grain size distribution and thermoelectric properties in the sintered samples were measured. Furthermore, influence of CONP addition on grain growth was investigated after heat treatment at 500 ˚C for 50 h in an argon gas. Milling process was effective enough to grain refining, but CONP addition had little effect on it. The milling treated samples lowered the thermal conductivity regardless of CONP addition. The milling treated sample without CONP addition had the best thermoelectric performance of ZT = 1.15 at 600 ˚C. The samples with CONP addition, however, resulted in degradation of thermoelectric performance at high temperature. The heat treatment brought to the grain growth for the sample without CONP addition and resulted in degradation of thermoelectric performance, while the sample with CONP addition controlled the grain growth after the heat treatment and maintained the thermoelectric performance.抄録全体を表示PDF形式でダウンロード (1192K)
本会記事
-
2015 年 62 巻 3 号 p. MtgPr3_2-MtgPr3_20
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスPDF形式でダウンロード (628K) -
2015 年 62 巻 3 号 p. Pref3_1-
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセスPDF形式でダウンロード (934K)
訂正
-
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 ...2015 年 62 巻 3 号 p. 123-
発行日: 2015/03/15
公開日: 2015/04/11
ジャーナル オープンアクセス訂正
本誌第59巻第9号 (2012年 9月号)pp. 557-563に掲載の水内 潔氏，井上 漢龍氏，上利 泰幸氏，長岡 亨氏，杉岡 正美氏，田中 基博氏，武内 孝氏，谷 淳一氏，川原 正和氏，巻野 勇喜雄氏，井藤 幹夫氏の研究速報「持続型固－液共存状態を利用してSPS成形したAl/β-SiC複合材料の熱物性」の参考文献につきまして，著者より訂正の申し出がありました．修正個所は下記の通りです.
P.563左段下から 2行目
(誤)
19) K. Mizuuchi, K. Inoue, Y. Agari, T. Nagaoka, Y. Morisada, M. Sugioka, M. Tanaka, T. Takeuchi, J. Tani, M. Kawahara Y, Makino, and M Ito: "Processing and thermal properties of Al/SiC composites in continuous solid-liquid co-existent state by spark plasma sintering", Compos. Part B: Eng., 42 (2011) in press.
(正)
19) K. Mizuuchi, K. Inoue, Y. Agari, T. Nagaoka, Y. Morisada, M. Sugioka, M. Tanaka, T. Takeuchi, J. Tani, M. Kawahara Y, Makino, and M Ito: "Processing of Al/SiC composites in continuous solid-liquid co-existent state by SPS and their thermal properties", Compos. Part B: Eng., 43 (2012) 2012-2019.抄録全体を表示PDF形式でダウンロード (267K)
- |<
- <
- 1
- >
- >|