巻号一覧
1984 巻 (1984)
- 119 号 p. 181-
- 118 号 p. 117-
- 117 号 p. 61-
- 116 号 p. 2-
1984 巻, 116 号
選択された号の論文の7件中1～7を表示しています
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藤井 貴美夫, 黒沢 武, 斎藤 保, 野村 真三, 今井 久1984 年 1984 巻 116 号 p. 2-9
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーSeventeen kinds of carbons and graphites were oxidized in helium flow containing 0.65% of water vapor or carbon dioxide in the temperature range from 800 to 1000°C.The rate of reaction with carbon dioxide was relatively equal to that with water vapor.Correlations between the rates and some characters such as the concentrations of impurity contained in the materials and their X ray parameters of structure were also investigated.Only the concentrations of iron impurity were related to the rates, and the total of the concentrations of iron and those of titanium, vanadium and nickel were more closely related to the rates.The compensation effects, which are characteristic to catalytic reaction, were found to exist between the activation energies for the reactions and the pre-exponential factors.Iso kinetic temperatures, at which all catalysts lose their effect, were 1550°K for the reaction with water vapor and 1380°K for the reaction with carbon dioxide.抄録全体を表示PDF形式でダウンロード (980K) -
鳥飼 直親, 磯尾 典男, 目黒 竹司, 田草川 豊1984 年 1984 巻 116 号 p. 10-18
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーThe oxidation of sample rods, machined in the size of 20∅×30 mm, was carried out in the flow of CO2 at temperatures of 900 to 1100°C.Carbon blocks used in this experiment were prepared from both pulverized anthracite and delayed pitch cokes, molded with binder and baked at 1000 to 1500°C.These carbon blocks have different pore size distributions, centering at around 1.5-2μm, 10μm and 20-30μm in radii, respectively.
As the reaction proceeded to some extent, the carbon sample rod was taken out from the furnace and oxidation rate was determined by weighing the decreasing of weight.Then, following the cuts of thin layers from the surface of sample rod by turning at every 0.5mm thickness, the rod was removed from the lathe.For each cut, the weight loss and size change of the rod were determined and changing of bulk density inside the sample rod was calculated.Kinetics discussion is given on these results.抄録全体を表示PDF形式でダウンロード (6234K) -
小島 昭, 大谷 杉郎, 飯塚 重雄, 長谷川 徹1984 年 1984 巻 116 号 p. 19-27
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーIt was tried to prepare a carbon fiber reinforced carbon (CFRC) plate by the lamination of high performance carbon fiber (CF) paper.A carbon fiber reinforced plastics (CFRP) plate was prepared by laminating 80 sheets of the CF paper which was coated with phenol resin containing some amount of graphite powder, and carbonizing it into CFRC plate (3.5mm in thickness) at a temperature up to 1000°C under nitrogen (Fig.1).
The CFRC plate underwent the densification, high temperature and hot-press treatments to improve its mechanical strength. The densification treatment did not improve the mechanical strength of the CFRC plate (Table 1).While, by the high temperature treatment (1500°C, 2200°C, and 2500°C), the flexural and shear strength of the CFRC plate remarkably increased and the modulus slightly decreased.The maximum flexural strength was obtained at 2200°C of HTT (Table 2).The thickness of CFRC plate decreased from 3.5mm to 3.2mm with the increase of the treatment temperature from 1000°C to 2500°C (Fig.4).The X-ray diffraction profiles of the CFRC indicated the growth of graphitic structure at the temperature over 2200°C (Fig.7).It suggests that the shrinkage of CFRC plate was due to the structural change of the matrix and CF by stress graphitization.
By hot-press treatment (2200°C, 140kg/cm2), the thickness of CFRC plate decreased from 3.5mm to 2.5mm, the bulk density increased to 1.78, the porosity decreased to 12%, and the cross section texture became more homogeneous than that before the treatment.The mechanical properties of this CFRC plate was 150MPa in flexural strength, 39GPa in flexural modulus, and 200MPa in compressive strength, and these values obtained show narrower scatter than that in other cases (Table 2).On the bases of the best properties previously obtained on UD-CFRC samples and of the results in this work, it was assumed that the maximum value of quasi-isotropic CFRC plate is 150-200MPa in flexural strength.抄録全体を表示PDF形式でダウンロード (3976K) -
小島 昭, 大谷 杉郎1984 年 1984 巻 116 号 p. 28-29
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (362K) -
赤外分光法による研究玉井 桂子, 中溝 実1984 年 1984 巻 116 号 p. 30-34
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (596K) -
持田 勲, 光来 要三1984 年 1984 巻 116 号 p. 35-44
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (4064K) -
菱山 幸宥1984 年 1984 巻 116 号 p. 45-52
発行日: 1984/01/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1737K)
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