| Project/Area Number |
06555180
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Physical properties of metals
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| Research Institution | TEIKYO UNIVERSITY |
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Principal Investigator |
OHBA Takuya Teikyo University, Dept.of Mat.Sci.& Eng., Assoc.Prof., 理工学部, 助教授 (00211110)
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| Co-Investigator(Kenkyū-buntansha) |
YAMANO Akito Rigaku Denki Co.Itd., X-ray Institute, X線研究所, 技師補
NAKAMURA Shinichi Teikyo University, Dept.of Mat.Sci.& Eng., Res.Assoc., 理工学部, 助手 (80217851)
HARA Toru Teikyo University, Dept.of Mat.Sci.& Eng., Res.Assoc., 理工学部, 助手 (70238161)
TAI Hideo Teikyo University, Dept.of Mat.Sci.& Eng., Professor, 理工学部, 教授 (80029074)
堀 俊彦 帝京大学, 理学電機・X線研究所, 主任研究員
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| Project Period (FY) |
1994 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1994: ¥4,000,000 (Direct Cost: ¥4,000,000)
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| Keywords | low temp.equipment / four circle diffractometer / stirling engine / x-ray diffraction / phase transition / X線4軸回折計 / 小型冷凍機 |
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| Research Abstract |
Since the phase transformation plays an important role in materials science, the study of the phase transformation becomes important. The structural study of the phase transformation is fundamental and important subject. One of the useful equipment for the structural study is the four circle diffractometer. It is very useful for determining the crystal structure of new materials and also for studying the mechanism of the transformation. Nowadays two types of low temperature equipment are widely used for the four circle diffractometer. One is the blowing N<@D22@>D2 gas type and another is the thermal cycling type. The former one is conventional, but has problems such as a lot of consumption of liquid N<@D22@>D2 and a non-uniform temperature around the sample. The latter one has been used and produced a lot of useful information. However, we need a large and special four circle diffractometer for supporting the latter type of the low temperature equipment. To solve those problem, we have
… More
developed the small low temperature equipment by using small closed-cycle integral stirling engine. The micro- cooler produced by Inframetrics, Inc.was used for cooling apparatus. The equipment is divided into three parts, that is, the connecting part to the four circle diffractometer, cooling apparatus and the chamber. The sample is placed into the chamber which has Be windows to transmit the x-ray. The temperature reached was 117K (-156ﾟC) close to the sample and can be obtained within 30 minutes. The stability of the temperature is whthin (]SY.+-。[)1.5K at the reached temperature. The deviation of the temperature will be improved after adjustment of temperature controller. The Laue photos were taken and several measurements were tried with the equipment mounted on the four circle diffractometer. Although there remain some problems to be solved for the conventional use, the development of this small low temperature equipment will promote the possibility of low temperature x-ray experiment. Less
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