巻号一覧
1979 巻 (1979)
- 99 号 p. 125-
- 98 号 p. 89-
- 97 号 p. 47-
- 96 号 p. 2-
1979 巻, 97 号
選択された号の論文の6件中1～6を表示しています
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第3報黒鉛の熱衝撃破壊じん性佐藤 千之助, 淡路 英夫, 阿久沢 広信, 金 順一1979 年 1979 巻 97 号 p. 47-53
発行日: 1979/04/10
公開日: 2010/06/28
ジャーナル フリーIn our recent papers, we presented a new technique for determining the thermal shock fracture toughness, using a disk specimen with an edge crack.The thermal shock fracture toughness is defined as KICk/Eα (KIC standing for fracture toughness;k for thermal conductivity;E for Young's modulus;α for thermal expansion coefficient) and it can be determined en bloc by measuring the threshold electric power of the arc discharge heating produced when an edge crack propagates in the disk.The value obtained is the fracture toughness corresponding to the thermal shock resistance defined as σ k/Eα (σ standing for tensile strength).The experimental data shown in the following discussion concern themselves with four kinds of reactor grade graphite and some varieties of electrode graphite.抄録全体を表示PDF形式でダウンロード (5704K) -
細川 健次, 山口 克1979 年 1979 巻 97 号 p. 54-60
発行日: 1979/04/10
公開日: 2010/06/28
ジャーナル フリーThe BET surface area and pore size distribution were determined by physical adsorption-desorption measurement of carbon dioxide at 195K on various hard carbons, prepared from divinyl benzene polymer (DVBP), copolymer of divinyl benzene and acrylic acid (IRC-50), phenol-formal-dehyde resin (P-F) and carbon fiber (C-F), and change of pore structure in carbons with heat treatment temperature (HTT) was discussed.Each carbon was heat treated at various temperatures between 1173-2273K (900-2000°C)
Below the heat treatment temperature of 1473K, the isotherms for all carbons were those of Langmuir-type.Above 1673K, however, the isotherms were BET-II-type, except the carbon fiber. The surface area of IRC-50 and C-F carbons decreased from relatively large value (ca.300m2/g) below 1473K to small value, less than 100m2/g, above 1673K.On the DVBP carbon, however, rather large area, few hundreds square meters per gram, was maintained over the temperature range examined. The area of P-F carbon was 31.5m2/g at 1273K, increased to 59.7 at 1773K and then decreased to 27.5m2/g at 2273K.The pores in these carbons were micro pores and transitional pores.In the carbons with HTT of 1473K, almost all of pores had the diameter less than about 30 Å.With the increase in HTT, the maximum of the pore diameter shifted to larger side.The temperature programmed desorption (TPD) method was proved to be a promising way to show an outline of the pore size distribution in carbons.抄録全体を表示PDF形式でダウンロード (817K) -
高尾 順三, 高橋 洋一, 向坊 隆1979 年 1979 巻 97 号 p. 61-65
発行日: 1979/04/10
公開日: 2010/06/28
ジャーナル フリーThe intercalation reactions of carbon cathode during electrolysis in molten Na3AlF6-Al2O3-CaF2, NaF and NaCl were studied. Samples of cokes heat-treated at several different temperatures were used as cathode in the electrolysis.It was observed that the d (002) spacing of the cokes changed during electrolysis, indicating the formation of lamellar compounds.The change was most appreciable in the system Na3 AlF6-Al2O3-CaF2.
For the cokes heat-treated at low temperatures showed greater changes in d (002) than those heat-treated at high temperatures.This relation was very similar to that for reactions of carbons with metallic sodium.The compounds thus formed by electrolysis were, however, found to be fairly stable in the open air or in the water, in contrast to the instability of the sodium-carbon lamellar compounds.It was indicated by solid-mass spectrometry that a small amount of fluorine was present, in addition to sodium, in the product by electrolysis.抄録全体を表示PDF形式でダウンロード (654K) -
M. Inagaki, A. Oberlin1979 年 1979 巻 97 号 p. 66-69
発行日: 1979/04/10
公開日: 2010/06/28
ジャーナル フリーThe structure of the TS carbon prepared from phenol resin with nickelocene was studied with high resolution electron microscopy.It has many micropores of which walls consist of carbon layer stacks.The carbon layers are straight and well-developed in long range, but the stacking of these layers has no three-dimensional order (turbostratic). The carbon formed by the catalytic action of silicon has the same microtexture and structure.抄録全体を表示PDF形式でダウンロード (9194K) -
堀江 典郎1979 年 1979 巻 97 号 p. 70-72
発行日: 1979/04/10
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (386K) -
稲垣 道夫1979 年 1979 巻 97 号 p. 73-79
発行日: 1979/04/10
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (9655K)
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