2000 Fiscal Year Final Research Report Summary
Mechanical heterogeneity in rocks with a nano-indentation tester
| Project/Area Number |
10440140
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Shizuoka University |
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Principal Investigator |
MASUDA Toshiki Faculty of Science, Shizuoka University, Professor, 理学部, 教授 (30126164)
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| Project Period (FY) |
1998 – 2000
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| Keywords | nano-indentation cester / atomic force microscope / minerals / Young's modulus / diamond indenter / plastic deformation / point contact deformation / lattice creasing |
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| Research Abstract |
A nano-indentation tester (RIDER-1) with a pyramidal diamond indenter can measure the load and the displacement with a high precision during the loading and unlaoding cycle. Vickers indentation test of natural quartz were performed with a load of 98 mN at room temperature and one atmosphere. Atomic force microscopy revealed no evidence of fracturing during indentation. Transmission electron microscope observations indicate that no dislocations were generated during the indentation tests. However, high resolution electron microscopy revealed that sharp creases of crystal lattices had developed. These observations lead to the conclusion that quartz deformed plastically even at room temperature. The plastic strain was accommodated by the mechanism of lattice creasing, which is described here for the first time. Young's modulus of quartz, piedmontite and glaucophane were also measured with the Oliver-Pharr method, the results being 14.7, 37.1 and 46 GPa, respectively.
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[Publications] Masuda,T.,Hiraga,T.,Ikei,H.,Kanda,H.,Kugimiya,Y.& Akizuki,M.: "Plastic deformation of quarty at room temperature : a Vickers nano-indentation test"Geophysical Research Letters. 27. 2773-2776 (2000)
Description
「研究成果報告書概要(和文)」より
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[Publications] Komiya, T., Maruyama, S., Masuda, T., Nohda, S., Hayashi, M.& Okamoto, K.: "Plate tectonics at 3.8-3.7 Ga field evidence from the lsua accretionary complex ; southern West Greenland."Journal of Geology. 107. 515-554 (1999)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Masuda, T., Hiraga, T., Ikei, H., Kanda, H., Kugimiya, Y.& Akizuki, M.: "Plastic deformation of quartz at room temperature : a Vickers nano-indentation test."Geophysical Research Letters. 27. 2773-2776 (2000)
Description
「研究成果報告書概要(欧文)」より
