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Jun-ichi MATSUSHITA, Shigeki TANAKA, Jun-ichi KAWANO, Noriyuki TAKASHI ...
1998 Volume 10 Issue 2-3 Pages
182-184
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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A measurement of the thermoelectric property of conductive ceramics by multi-scan method was developed. The conductive boride composite ceramics (10
4 S) with a size of 2×3×15mm was used in this experiment. The electorical conductivity and Seebeck coefficient at high temperature by multi-scan method were carried out in an electric furnace in an argon gas atmosphere at room temperature to 1073K. A rapid and accurate measurement of the Seebeck coefficient was performed by multi-scan method. The time needed for each measurement was less than a few fiftys of seconds, significantly shorter with accuracy than for a conventional do method.
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Effect of V for the carburizing
Shigeta ASAI, Kuniyasu GEMMA, Mamoru KAWAKAMI
1998 Volume 10 Issue 2-3 Pages
185
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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A steel for high temperature curburizing was curburized below A
1 point of iron such at 823-988K for 10.8ks. The steel containg V was also curburized 823-923K for same duration. Surface hardness of the steel after the carburizing was measured addition of V yielded increase of the surface hardness.
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Tadaaki AMANO, Yasuyuki YOSHIDA, Akihiko SEKIYA, Katsuhiro NISHIHARA, ...
1998 Volume 10 Issue 2-3 Pages
186-187
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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High-temperature corrosion behavior of Ni-20Cr-3Si alloys with small amounts of reactive elements and Ni-20Cr-5Si alloys was studied in a N
2-H
2O-HBr atmosphere. The oxide layer showed good oxide adherence of the Ni-20Cr-3Si-0.1Y alloy. On the other hand, the oxide layer was spalled over the entire surface of Ni-20Cr-3Si and Ni-20Cr-5Si alloys.
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Tadaaki AMANO, Kazuhiko KANZAKI, Shigekazu SUGOH, Tomoya TAKATSU, Atsu ...
1998 Volume 10 Issue 2-3 Pages
188-190
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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The formation of oxide on Fe-20Cr-4Al alloy with 35ppm of sulfur was observed in situ during heating-up at up to 1573K using a scanning laser microscope. Spalling of oxide scale on the alloy was also recognized along the alloy grain boundary at 668K during cooling from 1573K to room temperature after oxidation at 1573K for 18.0ks in air.
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Tadaaki AMANO, Takamitsu ARAI, Masaaki SEKINE, Kenichi KAWAI, Akihiro ...
1998 Volume 10 Issue 2-3 Pages
191-193
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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High-temperture oxidation behavior of Fe-20Cr-10Al fibers and disks with small amounts of reactive elements was studied at 1473K for 18.0ks in oxygen. Mass gain of these fibers increased in the order of Fe-20Cr-10Al-0.05Ti-0.05Hf<Fe-20Cr-10Al-0.05Ti-0.1Y<Fe-20Cr-10Al-0.05Ti-0.01Hf<Fe-20Cr-10Al<Fe-20Cr-10Al-0.05Ti-0.05Y<Fe-20Cr-10Al-0.05Ti. This result suggested that the addition of small amounts of reactive elements to the these fibers decreased the rate of oxidation.
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Takashi MAEDA, Keisuke SHIMIZU, Shin'ichiro AI, Hiroaki MATSUSHITA, Ak ...
1998 Volume 10 Issue 2-3 Pages
194-195
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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Among Cu-based multinary compounds, we have attempted to grow Cu
2-IV-Se
3 and Cu-III-IV-Se
4 compounds (III=Ga, In; IV=Ge, Sn). It is found that Cu
2GeSe
3, Cu
2SnSe
3, CuGaGeSe
4 and Se-rich CulnGeSe
4 are formed a single phase by melt growth, and these lattice constants are determined from powder X-ray diffraction. From the temperature dependence of electrical resistivities, thermal band gaps of Cu
2SnSe
3 and CuGaGeSe
4 are estimated to be 0.44 and 0.46eV, respectively.
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Mitsuhiro WADA, Hirohisa UCHIDA, Haru-Hisa UCHIDA
1998 Volume 10 Issue 2-3 Pages
196-197
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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Tb
0.3Dy
0.7Fe
2 giant magnetostrictive thin film was prepared using an ion beam sputtering (IBS) process. In spite of an amorphous like structure of the film analysed, significantly low coercive force, large magnetostriction and very high magnetostrictive susceptibility. The effect was yielded by Ar in the film included during the IBS process.
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Nobuaki URUSHIHARA, Masahiro HADANO, Tatsuhide INOUE, Hirohisa UCHIDA
1998 Volume 10 Issue 2-3 Pages
198-199
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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The effect of fluorination of LaNi
5 and LaNi
4.7Al
0.3 surfaces on the initial activation of hydrogen absorption was examined at 298K by measuring the H
2 reaction probability wider background pressures of 10
-8Pa and 10
-6Pa. The enhancement of the H
2 reaction probability was observed only on the H
2 pretreatment LaNi
4.7AI
0.3.
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Suguru YAMADA, Hiroyuki ARAI, Ryoko OKANO, Atsumi KINOSHITA
1998 Volume 10 Issue 2-3 Pages
200-203
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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We paid attention to Allylamine(MAA) as new material which takes the place of Polyvinylalcohol(PVA). In experiment, we synthesized Allylamine Phosphate(MAA-H
3PO
4) by MAA and Phosphoric acid(H
3PO
4). Polyallylamine Phosphate ∼N-[3-(Dimethylamino)propyl]methacrylamide copolymer gels (PAA-H
3PO
4∼DMAPMA Gels) was copolymerized by MAA-H
3PO
4, DMAPMA and N, N′-Methylene-bis-acrylamide (MBAA). Then, PAA-HCl∼DMAPMA Gels was obtained by PAA-H
3PO
4∼DMAPMA Gels substituted with HCl. We measured bending rates of gels by electric field impressing in electrolytes solution. In result, it was found that PAA-HCl∼DMAPMA Gels showed rates of 4.274deg/sec in 15V, electrode distance; 4cm, crosslink ratio (PAA-HCl∼DMAPMA: MBAA; 97: 3, copolymerization ratio (PAA-HCl: DMAPMA); 7: 3 and electrolytes solution; 0.01mol/
l-CaCl
2aq PAA-HCl∼DMAPMA Gels which shows very fast bending rates will expect functionally materials of artificial muscle and actuator.
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Masashi KANAYA, Takao HOMMA
1998 Volume 10 Issue 2-3 Pages
204-205
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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In this study, we reported isolation and chemical structure of flavonoids from pistil and petal of safflower. These flavonoids were extracted by methanol which have been isolated by several chromathograhy. The isolated flavonoid was identified by using UV/VIS spectra.
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Masaaki NOGUCHI, Tomoya NAKAJIMA, Tsunenori SUZUKI
1998 Volume 10 Issue 2-3 Pages
206-207
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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We developed a CAI system using a formula management and inference division, which used pointer variables including a sentence structure analysis and a check division.
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Taichi OHKI, Tsunenori SUZUKI
1998 Volume 10 Issue 2-3 Pages
208-209
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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We developed an useful CAI system on Local Aria Network. The system can be characterized by the possibility of sending reports on lines and writing memos on the CRT by the user.
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Tomoyuki TADA, Tsunenori SUZUKI
1998 Volume 10 Issue 2-3 Pages
210-211
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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We have constructed computer assisted instruction system which runs on the World Wide Web (WWW) using Java language. As a result, the contents became more dynamic and interactive than ever before. Also the system was able to manage a number of students data at once on the server side.
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[in Japanese]
1998 Volume 10 Issue 2-3 Pages
f1-f5
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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[in Japanese]
1998 Volume 10 Issue 2-3 Pages
f6-f9
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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[in Japanese]
1998 Volume 10 Issue 2-3 Pages
f10-f13
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
JOURNAL
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[in Japanese]
1998 Volume 10 Issue 2-3 Pages
f14-f17
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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[in Japanese]
1998 Volume 10 Issue 2-3 Pages
f18-f24
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
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[in Japanese]
1998 Volume 10 Issue 2-3 Pages
f25-f28
Published: September 30, 1998
Released on J-STAGE: February 25, 2010
JOURNAL
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