巻号一覧
26 巻, 3 号
選択された号の論文の16件中1～16を表示しています
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辛島 誠一1962 年 26 巻 3 号 p. 145-147
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーSpiral patterns were often observed during chemical polishing of α-brass with phosphoric, acetic and nitric acid solution. Several experiments were performed in order to clarify their formation mechanism. It is confirmed that these patterns are quite similar to the ones formed on aluminium surface by electropolishing reported previously. It is concluded that they represent growth spiral patterns of cuprous oxide deposited on specimen surface in the course of chemical polishing. A small addition of chloric ions proved to be very effective to prevent their formation and to get good polishing. They are supposed to act as catalyser to carry away excess metallic ions.抄録全体を表示PDF形式でダウンロード (997K) -
竹内 栄, 遠藤 裕久1962 年 26 巻 3 号 p. 148-151
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe crystal structure of metals is destroyed on melting and the Brillouin zone structure associated with their electronic energies disappears. It may be therefore considered that the valence electrons of atoms in molten metals can move in the field of randomly distributed ions as a free electoron gas. These considerations can be varified by the measurement of the Hall coefficient or the magnetic susceptibility of metals in molten state. In this paper the Hall coefficients for some pure metals Cd, In, Sn and Bi were measured precisely. The observed Hall coefficients for these molten metals were independent of temperature and were in good agreement with their theoretical values calculated under the assumption that all of the valence electron of atoms in metals contribute to the Hall effect as free electrons.抄録全体を表示PDF形式でダウンロード (570K) -
竹内 栄, 遠藤 裕久1962 年 26 巻 3 号 p. 152-156
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーFor the purpose of obtaining some knowledge concerning the electronic structure of molten metals, the magmetic susceptibilities of molten metals and alloys were measured precisely as a function of temperature or alloys concentration. No change in magnetic susceptibility with rise of temperature was observed in the molten phase of pure metals such as Ag, Cd, In, Sn, Pb, Bi and Sb and of alloy systems such as Bi-Ag, Bi-Cd, Bi-In, Bi-Sn, Pb-Sn and Pb-Sb. The measured susceptibilities of these metals and alloys in molten state were in good agreement with the theoretical values given by the sum of the known diamagnetic susceptibility of ions and the paramagnetic susceptibility calculated by application of Pauli-Landau’s formula for the degenerated free electron gas composed of valuence electrons of atoms in molten metals. The change in magnetic susceptibility with the concentration of molten alloys was found to depend mainly upon the change in electron density in the alloys.抄録全体を表示PDF形式でダウンロード (623K) -
三谷 裕康, 大西 正已1962 年 26 巻 3 号 p. 157-160
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーDie Stahlproben, welche Silizium in gleicher Konzentration (die Fe3Si entspricht) erthaltende porenfreie Ferrosiliziumschutzschichten von etwa 0.3 mm Dicke trugen, wurden als die Diffusionspartner benutzt, und das Diffusionsglühen wurde bei Temperaturen 1100° und 1180°C in N2-Gasstrom Durchgeführt. Damit ergibt sich für den Diffusionskoeffizient von Si in Fe
D = 7,261 exp(-57020/RT) cm^2/sec. Beim obigen Temperaturbereiche bildet sich zunächst ein Porensaum in der porenfreien Schutzschicht nach kurzer Glühensdauer aus, und wächst mit der Zeit, aber es schwindet schließlich nach langer Glühensdauer. In diesem Falle bewegt sich der Porensaum von der Grenzfläche mit Zunahme der Glühensdauer nach außen hin, und verschiebt sich Durchschnitt von der Grenzfläche proportional der Wurzel der Diffusionzeit, wie Heumann und Kottomann(7) für Ag-Au-System darstellten. Damit ist es richtig anzunehmen, daß die in der porenfreien Schutzschicht nach Diffusionsglühen auftretende Lochbildung auf ungleicher Diffusion (kirkendallscher Diffusion) für Fe-Si-System beruht.抄録全体を表示PDF形式でダウンロード (874K) -
三谷 裕康, 大西 正已1962 年 26 巻 3 号 p. 161-165
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn Gebrauch von verschiedenen Stahlproben, deren Kohlenstoffgehalt zwischen 0.14% und 1.1% steht, versuchten die Autoren den einfluß des Kohlenstoffgehalts auf die Bildung der porenfreien Ferrosiliziumschicht. Es läßt sich erfolgen, daß die porenfreie Schutzschicht leichter mit Zunahme des Kohlenstoffgehalts gewonnen wird, denn der Kohlenstoff die partielle Diffusion von Silizium hindert, und die Lochbildung, welche aus ungleicher Diffusion (kirkendallscher Diffusion) erfolgt, vermag nur schwierig entstehen.抄録全体を表示PDF形式でダウンロード (1036K) -
井上 繁弘, 土屋 隆1962 年 26 巻 3 号 p. 165-169
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーEffect of Nb on the properties of Ni-Mo alloys was investigated by hardness, tensile, microscopic and corrosion tests. The following results were obtained. (1) Corrosion loss of solution-treated Ni-Mo alloys containing 2.0%Nb and more, increased in some degree. (2) The alloy containing 1.5 to 3.0%Nb annealed at 700°C for 1 hour, showed superior resistivity. (3) The maximum hardness was obtained by aging at 700°C. (4) When excellent abrasion and corrosion resistance were reguired, the most effective condition was obtained by annealing the alloy containing 1.5 to 2.0%Nb at 850°C for 25 hours.抄録全体を表示PDF形式でダウンロード (557K) -
井上 繁弘, 土屋 隆1962 年 26 巻 3 号 p. 169-174
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe effect of V,Nb and W on the properties of Ni-Mo-Cr alloys was investigated by hardness, tensile, microscopic and corrosion tests. The corrosion test was carried out on specimens in boiling 2 wt%HCl for 24 hours. The following results were obtained. (1) With increasing content of V and Nb, both the corrosion loss and the strength of solution-treated Ni-Mo-Cr alloys increased, but those of the alloy containing W showed no remarkable variation. (2) The alloy containing 5%W annealed at 700°C and 800°C showed superior corrosion resistivity, but the alloy V and Nb annealed at the same temperature showed corrosion resistivity inferior to that of plain Ni-Mo-Cr alloys. (3) Upon age hardening at high temperature, the relation between the hardness and the contents of added elements was not always consistent.抄録全体を表示PDF形式でダウンロード (1084K) -
大津 武通, 佐藤 史郎1962 年 26 巻 3 号 p. 174-177
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIt was reported in the previous paper that α brass of high zinc content showed layertype corrosion when exposed to hot water and steam. This paper reports the effect of additional elements on the corrosion of α brass by hot water and steam. Cu-30%Zn alloys containing small amounts of As, Sb, P, Sn, Fe, Ni, Ti or Zr as the additional element were used. The specimens were set in an autoclave. After the exposure to saturated water and steam at 300°C for 250 hours, determination of weight gain, tensile test and measurement of thickness of the corrosion layer were performed to estimate the effect of additional elements on the corrosion. The results obtained were as follows. (1) By addition of As or Sb to the alloy the rate of corrosion is greatly promoted. For example the thickness of corrosion layer of Cu-30%Zn—0.09%As alloy was more than 80 μ but that of plain Cu-30%Zn alloy was less than 40 μ. (2) Addition of P or Sn lowers the rate of corrosion. Especially, addition of P is effective to inhibit corrosion. For example, the thickness of corrosion layer on Cu-30%Zn—0.05%P alloy was less than 7 μ. (3) Addition of Fe,Ni,Ti or Zr has no appreciable effect on corrosion.抄録全体を表示PDF形式でダウンロード (379K) -
阿部 敏雄, 大井 昇, 飯田 光雄1962 年 26 巻 3 号 p. 177-182
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーUsing the radioactive tracers, 198Au, 111Ag, 59Fe, and 64Cu, experiments have been made to see how metallic impurities are absorbed on the surface of Ge, Si, Mo, clear quartz, and polyethylene from several kinds of aqueous solution, and how the absorbed impurities are desorbed by acid etching or NaCN aq. treatment. Besides, using the resistivity change of Ge by heat treatment in clean atmosphere, Cu concentration absorbed on Ge surface from water under various conditions has been measured. The experimental results are as follows: (1) Over 1013 atoms/cm2 of the metallic elements are absorbed on Ge and Si surfaces by dipping the crystals into water containing Au+++, Ag+, or Cu++ ion (1014 ions/c.c) for 30 min. (2) Fe(≈1014 atoms/c.c) in water is scarcely absorbed on any of the substances (<1010 atoms/cm2) for 30 min at pH=1, but absorbed largely (>1012 atoms/c.c) at pH=7. (3) Au, Ag (≈1014 atoms/c.c) in HF+HNO3, and Au (≈1014 atoms/c.c), Fe(≈1015 atoms/c.c) in NaCN aq. can be absorbed considerably (1010∼1013 atoms/cm2 for 30 min) on Ge and Si surface. The degree of cleanness of the surface of Ge, or Si as etched with acid, dipped in NaCN aq. and washed with pure water, is limited by the facts (1), (2) and (3).抄録全体を表示PDF形式でダウンロード (688K) -
北川 公, 柴田 則夫1962 年 26 巻 3 号 p. 182-186
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーManganese-zinc ferrite is produced by firing of mixed oxides. If it is possible to determine the amount of free zinc oxide present in fired products, very useful informations would be obtained for the elucidation of the reaction mechanism. No detailed study on the determination of free zinc oxide in manganese zinc ferrite has been done in the past. In the present work, selection of extracting agent, extracting condition of free zinc oxide, and rapid volumetric determination of zinc in the extract with disodium ethylenediamine tetraacetate were carried out, with the following findings: (1) For extraction of free zinc oxide in ferrite, ammonium acetate solution is suitable. (2) Zinc in the extract containing a large amount of ammonium acetate can be determined by the EDTA titration method. (3) In the process of extraction by ammonium acetate solution, if oxides of manganese, copper, nickel, etc. co-exist, they dissolve partially and interfere with titration. (4) Iron oxide and spinel phase are not extracted by ammonium acetate solution. (5) When the sample of ferrite is ground finely (0.2 to 1 μ) in an agate mortar, the effect of grain size can be minimized.抄録全体を表示PDF形式でダウンロード (539K) -
北川 公, 柴田 則夫1962 年 26 巻 3 号 p. 186-190
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn an earlier work, the determination of free zinc oxide in manganese-zinc ferrite was studied by the authors. The present work has been done in order to establish an optimum simultaneous determination condition of free zinc oxide and free copper oxide in copper-zinc ferrite. Experiments of selection of suitable extracting agent for simultaneous extraction of free zinc oxide and free copper oxide, extracting condition, and rapid volumetric determination of zinc and copper in the extract with disodium ethylenediamine tetraacetate in the presence of potassium cyanide as a masking agent were carried out, with the following findings: (1) Extraction is nearly complete in 1 hour or more for free zinc oxide in ferrite at 90°C in 12% ammonium acetate solution, or in 8 hours or more for free copper oxide under the same conditions. (2) The temperature at which free zinc oxide in copper-zinc ferrite disappears differs appreciably from that for free copper oxide. (3) When the sample of ferrite described above is treated for 1 hour or more at 90°C in 10% sodium hydroxide solution, free zinc oxide only can be extracted. (4) There is a good agreement between the results of estimation of free zinc oxide in ferrite obtained by the ammonium acetate extraction method and the sodium hydroxide extraction method.抄録全体を表示PDF形式でダウンロード (590K) -
沢田 敏男, 加藤 栄1962 年 26 巻 3 号 p. 190-195
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーA spectrophotometric method for the determination of palladium in titanium alloys has been developed by the use of palladium-tin chloride system. The reaction of palladium (II) with tin (II) in hydrochloric acid has a very interesting process in its color development. Absorption spectra were obtained only in two forms of which one is that of initial yellow complex and the other that of final green. Even the well-known green complexes of palladium still showed the changes of color quality in the visible region, particularly near ultra-violet, with lapse of time. But it was found that the absorbance of the green complexes shows only a negligible change at 635 mμ region and the spectrophotometric method is useful for the determiation. Dissolve 0.5 g of sample in 5 mL of 2 M citric, 16 mL of 6 N hydrochloric, and 6 mL of 11.5 N hydrofluoric acids. When the reaction subsides,add 3 mL of 16N nitric acid, and heat the solution gently until dissolution is complete. Add 1.5 g of boric acid and 2 g of urea, and dissolve completely. Cool the solution to 20°C, and add 5 mL of 0.5 M stannous chloride. Transfer the solution to a 50 mL calibrated flask, dilute to the mark with water, and mix well. Let stand for 15min, and obtain the absorbance of the solution at 635 mμ within 30 min. Under the conditions, the system conforms practically to Beer’s law, as given by 2.4×103 for the molecular extinction coefficient of palladium. Many elements normally found in titanium alloys cause no interference except molybdenum. The coefficient of deviation is less than 2.6 percent at 0.05∼5 percent palladium level.抄録全体を表示PDF形式でダウンロード (786K) -
奥本 武臣, 近藤 賢治1962 年 26 巻 3 号 p. 195-199
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIt is well known that as the Si content of black-heart malleable cast iron increases, the so-called galvanizing embrittlement is apt to appear, but all observations of the phenomenon in the past were made only at room temperature. However, it is thought reasonable that the phenomenon should be considered on the basis of the whole figure of impact transition from the view point of low-temperature embrittlement. This experiment was planned from such a stand-point. Three kinds of samples were prepared to contain Si in the range of chemical compositions of commercial black-heart malleable cast iron. They were malleablized, some were heated and held at various temperature of 250∼700°C, and then water-quenched. The impact tests were carried on that samples at temperatures of −196∼+100°C, and impact transition curves were obtained. The results are summarized as follows: (1) According to the increase of Si content, the impact-transition temperature shifts to the side of higher temperature and the tendency of inducing low-temperature embrittlement increases, and the maximum absorbed energy decreases. (2) The transition temperature shifts to the higher side by heat treatment at various temperatures up to 700°C, and the susceptibility to embrittlement is largest when heat treatment is carried out 450°C.抄録全体を表示PDF形式でダウンロード (924K) -
奥本 武臣, 近藤 賢治1962 年 26 巻 3 号 p. 199-204
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIt is apparently move reasonable to study the effects of P on the impact properties of black-heart malleable cast iron on the basis of impact transition curve, than on the test results at normal temperature only. This experiment was carried out from such a stand-point. Four kinds of samples were prepared to contain P in the range of 0.06∼0.32%. They were malleablized, some were heated at various temperatures 250∼700°C, and then water-quenched. The impact tests were carried on that samples at temperatures of −196∼+200°C, and impact transition curves were obtained. The results were as follows: (1) According to the increase of P content, the impact transition temperature shifts to the higher side and low-temperature embrittlement is apt to appear, and the maximum absorbed energy decreases. (2) The transition temperature shifts to the higher side by heat treatment at various temperatures up to 600°C, and 450°C treatment raises the susceptibility to embrittlement most largely. (3) 650°C treatment shifts the transition temperature to the side of lower temperature, the degree of shift increases as the P content increases, and this treatment is effective as a method to recover toughness.抄録全体を表示PDF形式でダウンロード (847K) -
奥本 武臣, 近藤 賢治1962 年 26 巻 3 号 p. 204-209
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe authors reported a part of the effects of heat treatment at temperatures below A1 point on the low-temperature embrittlement. The present report supplements the previous report, and the effects of cooling method from heat-treatment temperatures and holding time at treatment temperatures are discussed from the view point of the behavior of transition temperature. The results is summarized as follows: the higher the cooling speed and the longer the holding time, the greater the susceptibility to embrittlement by 450°C treatment. The tendency to toughening by 650°C treatment is independent on the cooling method and holding time.抄録全体を表示PDF形式でダウンロード (870K) -
藤田 修, 菊永 牧男, 久保 陽1962 年 26 巻 3 号 p. 209-214
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe influence of desulfurization by calcium-carbide injection on the microstructure of pure iron-carbon-silicon alloys has been studied. Desulfurization with calcium carbide results in a remarkable change in the form of graphite, namely, flaky-type graphite in untreated alloy, fine undercooled graphite and spheroidal graphite in extremely desulfurized alloy. The process of solidification in the alloys was studied by the quenching method. Fine undercooled graphite in the extremely desulfurized alloy corresponds to the lower eutectic temperature and larger number of eutectic cells. Determination of oxygen and nitrogen contents in the alloys was also carried out. The results indicate that the described change in the sequence of solidification and graphite type is caused by sulfur.抄録全体を表示PDF形式でダウンロード (1349K)
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