巻号一覧
31 巻, 12 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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濱田 元春, 久保 浩士, 原田 俊一1980 年 31 巻 12 号 p. 652-660
発行日: 1980/12/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (2637K) -
逢坂 哲弥, 沢井 秀夫, 音居 文雄, 二瓶 公志1980 年 31 巻 12 号 p. 661-666
発行日: 1980/12/01
公開日: 2009/10/30
ジャーナル フリーBath compositions and conditions for electroless Ni-W-P plating were investigated with changing Na-citrate and Na2WO4 concentrations. The co-deposition of 3-4 w/o tungsten with nickl made the phosphrus content in deposits lower from 8.9 to 2.3w/o and consequently the crystallinity of as-plated deposits was improved. The residual stress and the specific conductance of as-plated deposits were increased by the lower phosphorus content which was produced by tungsten co-deposition with nickel.抄録全体を表示PDF形式でダウンロード (680K) -
増井 寛二, 山田 敏夫, 久松 敬弘1980 年 31 巻 12 号 p. 667-672
発行日: 1980/12/01
公開日: 2009/10/30
ジャーナル フリーThe crystallization processes and kinetics of amorphous Ni-9.4wt%P, Ni-11.5 wt%P and Ni-14.4 wt%P alloys were studied by differential scanning carolimetry, electron microscopy, and optical microscopy. Hardness measurements were also performed to follow the crystallization process. The crystallization mechanism of Ni-9.4 wt%P and Ni-11.5 wt%P alloys is a heterogeneous nucleation of tetragonal Ni3P in an amorphous matrix and its spherical growth, and that of Ni-14.4 wt%P alloy is a heterogeneous nucleation of a metastable crystal and its stacking lamellar growth. The apparent activation energies for the crystallization were 240kJ/mol (Ni-9.4wt%P), 249kJ/mol (Ni-11.5 wt%P), and 201kJ/mol (Ni-14.4 wt%P). The values of the Johnson-Mehl-Avrami's time index, n, for the crystallization were abut 3.1 (Ni-9.4 wt%P), 3.2 (Ni-11.5 wt%P), and 2.5 (Ni-14.4 wt%P). The experimentally observed relationship between hardness of the alloy and aging time and temperature was in good agreement with the calculated one using the kinetic parameters, that is, activation energy and frequency constant for the crystallization.抄録全体を表示PDF形式でダウンロード (1756K) -
津留 壽昭, 小林 繁夫, 大場 耕治, 乾 忠孝1980 年 31 巻 12 号 p. 673-678
発行日: 1980/12/01
公開日: 2009/10/30
ジャーナル フリーThe electrodeposition of aluminum in the solutions of aluminum bromide in cumene-ethylbenzene baths and the addition effects of tetraalkylammonium halides on the cathode current efficiency have been investigated. For promising aluminum deposition, additives had the effectiveness in the following order (CH3)4NI (silver-white)>(CH3)4 NCI (white)-(CH3)4 NBr (white)(C2H5)4 NCI(white)-(C2H5)4NI (white)(C2H5)4NBr (white-gray). The best effective additive as brightener was (CH3)4 NI. Although the additives increased the conductivity of the solutions, the cathode current efficiency decreased. The preferred orientation of the Al deposits was shown in (111) plane by mean of X-ray diffraction analysis. In case of the addition of (CH3)4 NI, the mean lattice constant and grain size of the deposits were found to be 4.04-4.06Å and 280-930Å, respectively. The purity of electrodeposited Al was more than 99.9% by means of emission spectrochemical analysis.抄録全体を表示PDF形式でダウンロード (1631K) -
水本 省三, 縄舟 秀美, 川崎 元雄1980 年 31 巻 12 号 p. 679-684
発行日: 1980/12/01
公開日: 2009/10/30
ジャーナル フリーElectrolytic oxidation of chromium (III) in chromic acid solutions was studied as functions of the electrolyte composition and the conditions of electrolysis. For a lead (IV) oxide anode, the current efficiency for the oxidation of chromium (III) to chromium (VI) was found to decrease with increasing current density and decreasing chromium (III) concentration. The cathodic polarization measured with an iron cathode was affected strongly by the concentrations of sulfate and chromium (III). In solutions without sulfate, the cathode reaction was solely evolution of hydrogen. In solutions containing sulfate, the reduction of chromium (VI) to chromium (III) was dominant at cathode potentials more noble than-1.0-1.1V (vs SCE), while the evolution of hydrogen, deposition of metallic chromium and reduction of chromium (VI) to chromium (III) were observed to occur simultaneously at less noble potentials. For the purpose of recovering chromic acid from chromium (III) using an electrolytic cell without diaphragm, it was found desirable that the electrolysis was carried out in a solution of high chromium (III) concentration with sulfate as low as possible, and using lead (IV) oxide as the anode. The current density must be low at the anode and sufficiently high at the cathode.抄録全体を表示PDF形式でダウンロード (891K) -
三浦 維四, 浜中 人士1980 年 31 巻 12 号 p. 685-691
発行日: 1980/12/01
公開日: 2009/10/30
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諸住 高1980 年 31 巻 12 号 p. 692-697
発行日: 1980/12/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1044K)
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