1994 Fiscal Year Final Research Report Summary
Micro-mechanics of Ceramic-Whiskers
| Project/Area Number |
05650086
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Nagasaki University |
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Principal Investigator |
IWANAGA Hiroshi Nagasaki Univ., Faculty of Liberal Arts; Prof., 教養部, 教授 (40039772)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Kazuo Nagasaki Univ., Faculty of Engineering; Prof., 工学部, 教授 (30225495)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Ceramic-Whisker / Carbon coil / Carbon fiber / Tensile strength / In situ observation |
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| Research Abstract |
A method of measuring tensile strength of a filament with a diameter of mum order has been devised. The method allows us to measure the tensile load in the range of 20 to 1500mg with an accuracy of about 1 mg under optical-microscope observation. In oder to measure the tensile strength, the cross sectional area of the specimen is estimated from a SEM micrograph of the fractured surface taken parallel to the specimen axis. Srtain is calculated by comparing the distance of markers, i.e.tiny whiskers distributed on a specimen, on micrographs taken at each stage of loading. The Young's modulus and the tensile strength of a pitch-based isotropic carbon filament thus obtained were about 60GPa and 850MPa, respectively.
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