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Volume 44, Issue 6
Displaying 1-21 of 21 articles from this issue
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Hidetosi TAKAHASI1975 Volume 44 Issue 6 Pages 563
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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Hajime HATANO1975 Volume 44 Issue 6 Pages 564-576
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSFundamental investigations on acoustic emission are carried out for its application in the fields of materials science and safety engineering. Firstly, acoustic emission caused by plastic deformation and fracture of various types of metals and alloys is observed to study its physical properties. Secondly, aquantitative measuring method of acoustic-emission power and spectra is worked out. This method is applied to tension tests of monocrystals and polycrystals. Quantitative results are discussed in connection with microscopic mechanisms such as d islocation kinetics in the material. Thirdly, amulti-channel acoustic-emission source-location system is developed and is applied to hydrostatic tests of pressure vessels. Acoustice emission. is shown. to have a potential value for nondestructive inspection and safety moni-toring of structures.View full abstractDownload PDF (4145K) -
Kiyoshi TAKAHASHI1975 Volume 44 Issue 6 Pages 577-595
Published: June 10, 1975
Released on J-STAGE: February 20, 2009
JOURNAL FREE ACCESSThis report describes the results obtained so far which are divided into the following. three:
i) A wheel rolling resistance measuring device and the experimental results. The experimental apparatus used is explained and then the results of experiment are described. Thus, the various relations have been found between: (1) the resultant rolling resistance _??_ received by a wheel running on soft ground (S. G.) such as pulverulent substance, its vertical component V and horizontal component H, the direction θ, the coordinates (_??_, _??_) of the point Q to which the force is applied, the driving torque of wheel M, ect., on one hand; and (2) the breadth of wheel b, the wheel diameter 2r, the travelling velocity v, the angular velocity ω, the sinking depth at the lowermost end of wheel y0, the grain diameter of S. G. sample, the degree of moisture, etc., on the other hand.
ii) Takahashi's theoretical equations for the resultant wheel rolling resistance based on the experimental results.
The resultant rolling resistance of a wheel, _??_, consists of the wheel surface pressure from S. G., p=kyn, and the frictional force ƒ=μp (Here, y is sinking depth of wheel face into S. G., k and n are the constants concerning S. G.; and μ is the coefficient of friction between wheel surface and S. G.) It is also found that the values of R, H, V, θ, Q (_??_, _??_), etc. generally differ between the two different cases of wheel rolling, i.e. when the wheel is pulled and the wheel is driven by its own power.
iii) Applications of the present studies and prospects to the future vehicles moving on themoon surface and the sea bottom.View full abstractDownload PDF (5954K) -
Takashi TOKUYAMA, Masao TAMURA, Naotsugu YOSHIHIRO, Takahide IKEDA, No ...1975 Volume 44 Issue 6 Pages 596-610
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSAnnealing behaviors of the damaged layers in silicon single crystal substrates implanted with the dose of some 1016ions/cm2 were investigated as a function of temperature, duration, and atmosphere of annealing, energy and species of ions, and surface conditions of the sub-strates. The nature, density, and distribution of the secondary defects, such as dislocation networks, dislocations both inside and outside of the implanted regions, and stacking faults were determined. The relations of such defects to the electrical and structural behaviors of the implanted ion species are discussed.
Several sorts of implantation and annealing combinations were suggested to reduce secondary defects remaining in the substrates after annealing. These combinations were applied to form an emitter region of the npn planar transistors. Electrical characteristics of these transistors, like low frequency noise and current amplification factor at small collector current, were comparable to those of conventional transistors fabricated by the thermal diffu-sion process.View full abstractDownload PDF (8287K) -
Koushi UEDA1975 Volume 44 Issue 6 Pages 611-614
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSSilver particles formed in argon gas by the evaporation method were studied by electron microscopy. Particles of octahedron and truncated triangular bipyramid were found. Splitting of spots due to multiple refraction effect was observed for octahedral particles. An attempt was made to calculate the mean inner potential by analysing the separation of the split spots.View full abstractDownload PDF (1549K) -
Yoshinori SETOGUCHI1975 Volume 44 Issue 6 Pages 615-624
Published: June 10, 1975
Released on J-STAGE: April 02, 2009
JOURNAL FREE ACCESSFor explaining both the composition dependence of magnetization and the ferromagnetic region of each Mn-Al-X (X=Fe, Ni and Cu) system over a wide range of composition, a model has been proposed, which contains the concept of nonstoichiometric bond between Mn and Al. Here, formation of assumed phases and change of nonstoichiometric bond factor Kc are considered; when Kc=1, stoichiometric bond occurs, and when Kc>1, the quantity of Mn forming [Mn-Al] is larger than that of Al. By using this model, the experimental results can be reasonably well explained. It has been shown that the influence of Mn-Al binary system is strong in the region with π phase, and that it disappears in the region with κ phase, but a nonstoichiometric bond between Mn and Al exists. Moreover, interpretation of assumed phases on the basis of substitution, and estimation of atomic distribution of an alloy in Mn-Al-Cu system according to our model have been attempted.View full abstractDownload PDF (945K) -
Katsumichi SUZUKI, B. P. HILDEBRAND1975 Volume 44 Issue 6 Pages 625-628
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSAn experiment on image distortion correction in acoustical holography was conducted. Scanned acoustical holography was used for imaging objects through a 5.06cm thick curved aluminum slab. Image distortion due to the curved slab was corrected in the reconstruction stage using two holograms; one, the hologram of the object, and the other, the hologram of the distortion media. A relatively good result has been obtained by the present experiment.View full abstractDownload PDF (1893K) -
Fujitoshi SHINOKI, Akio ITOH1975 Volume 44 Issue 6 Pages 629-634
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSPositive ions impinging on a substrate in an rf sputtering system are observed by a quadrupole mass spectrometer with retarding grids to measure the ion energy. A spherical titanium target is used to avoid the edge effect of a planer one. The current of ion species is measured as a function of the rf power density and discharge pressure respectively.
Argon is ionized by electron-impact ionization, being a main process of the discharge. The metal atoms, which are sputtered predominantly as neutral particles from the target, are ionized in the discharge by Penning ionization.
The plasma potential estimated from the measurement of the ion energy varies from about 20 to 30 V positive to the ground potential in the region of 10-1 to 2×10-3Torr of the discharge pressure. It suggests that the effect of the resputtering during the film deposition is very small.View full abstractDownload PDF (528K) -
Yoshiaki AKIMOTO, Toshiharu TAKO1975 Volume 44 Issue 6 Pages 635-640
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSTo improve the stability of a frequency stabilized laser, a double servo system consisting of a slow response loop and a fast response loop was designed, constructed and experimentally studied. In the faster response region, the phase lag of the servo system was mainly governed by the loop gain and the time constant of the fast response loop. This behavior was advantageously utilized in compensating the phase lag introduced by the integration element and, accordingly, in giving faster response to the total system.
Frequency fluctuation of the laser in 1-10 Hz region was analyzed using the power spectrum density. The frequency variation, thus estimated, was smaller than several parts in 1011.View full abstractDownload PDF (509K) -
Akinobu KASAMI1975 Volume 44 Issue 6 Pages 641
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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[in Japanese]1975 Volume 44 Issue 6 Pages 642
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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[in Japanese]1975 Volume 44 Issue 6 Pages 643
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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[in Japanese]1975 Volume 44 Issue 6 Pages 644
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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Akira NAKAMURA1975 Volume 44 Issue 6 Pages 645-655
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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Yujiro OHBA1975 Volume 44 Issue 6 Pages 656-660
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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Impurity Conduction in Doped SemiconductorsWataru SASAKI1975 Volume 44 Issue 6 Pages 661-665
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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Toshiyuki NINOMIYA1975 Volume 44 Issue 6 Pages 666-669
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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I. Cnare EffectNoboru MIURA, Giyu KIDO, Soshin CHIKAZUMI1975 Volume 44 Issue 6 Pages 670-674
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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II. Multi-Layer CoilMuneyuki DATE1975 Volume 44 Issue 6 Pages 675-678
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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III. Explosive-Driven Flux Compression MethodYasuaki NAKAGAWA, Yasuhiko SYONO, Tsuneaki GOTO, Jun NAKAI1975 Volume 44 Issue 6 Pages 679-683
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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Tatsuo SAKAUE, Koichi KASAHARA, Mineo IWASAWA, Masayoshi MATONO, Yasuh ...1975 Volume 44 Issue 6 Pages 684-689
Published: June 10, 1975
Released on J-STAGE: February 09, 2009
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