巻号一覧
1980 巻 (1980)
- 103 号 p. 143-
- 102 号 p. 101-
- 101 号 p. 49-
- 100 号 p. 3-
1980 巻, 103 号
選択された号の論文の4件中1～4を表示しています
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Isao Tomizuka, Youichi Amemiya1980 年 1980 巻 103 号 p. 143-148
発行日: 1980/10/31
公開日: 2010/06/28
ジャーナル フリーPlots of the inverse square root of X-ray small angle scattering intensity against square of scattering angle are known to be linear for many carbon fibres. Sometimes, however, the linearity is limited only in its high angle region and the plots deviate gradually from the straight line downwards.For the former type of the carbon fibres the void structure is well approximated with a Maxwellian, but not so for the latter because the assessed values of the Maxwellian parameters for a given specimen vary from one analytical procedure to another. This paper suggests a procedure to characterize the void structure in the latter sort of carbon fibre in a more convenient way than used in the past.It is based on the assumption that the observed scattering is caused by a void structure in a composite of two Maxwellians, one of which is represented by the straight line seen in the high angle region of the plots mentioned above.抄録全体を表示PDF形式でダウンロード (677K) -
大谷 朝男, 田中 高義, 大谷 杉郎1980 年 1980 巻 103 号 p. 149-154
発行日: 1980/10/31
公開日: 2010/06/28
ジャーナル フリーPitch Carbon is a binderless-carbon product which is prepared from variant pitch material (VPM).The present work was undertaken to elucidate how a small amount of soluble components in VPM influences on the properties of resulting Pitch Carbon. VPM was prepared by heating coal tar pitch up to 550°C bubbling nitrogen gas through it.It contained 0.5% of benzen soluble component, 1.8%R of quinoline soluble component and 0.5% of volatile component through heating under reduced pressure of 3 mmHg at 350°C for 1 hour. After pulverizing to-100 mesh, the VPM was further treated to cover the VPM particles with soluble components and to change the soluble component content in it. Eight kinds of VPMs thus prepared were moulded into pellet (20 mm∅ and several mm in thickness) under 1000 kg/cm2 and then heated at 1000° and 2800°C.
The soluble components covering VPM particles caused Pitch Carbon to decrease density and hardness.This decrease was more marked in Pitch Carbon from the VPM particles covered with thicker soluble component layer.It became apparent from the microscopic observations that through the heat-treatment process, the soluble components covering VPM particles decompose to result in formation of porous carbon between VPM particles and/or to form gaps along VPM particle surface.These phenomena causes Pitch Carbon to make less dense and less hard. The VPM free from soluble component gave Pitch Carbon having almost same properties as that from the VPM with no specific treatment.The causes of these phenomena are discussed.抄録全体を表示PDF形式でダウンロード (3260K) -
村田 哲雄, 松田 好晴1980 年 1980 巻 103 号 p. 155-157
発行日: 1980/10/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (344K) -
山田 泰弘, 今村 健1980 年 1980 巻 103 号 p. 158-167
発行日: 1980/10/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (12556K)
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