@article{oai:nipr.repo.nii.ac.jp:00004523,
 author = {Horii, Youichi and Fujii, Naoyuki and Takeda, Hiroshi},
 journal = {Proceedings of the NIPR Symposium on Antarctic Meteorites},
 month = {Oct},
 note = {P(論文), Mechanical properties of metallic particles in four shock-melted and seven unshocked ordinary chondrites were studied by means of the Micro Vickers Hardness Measurement. Together with the morphological and mineralogical properties, they were used to characterize the shock effects in the chondrites. Average value of hardness in Fe-Ni particles is smaller (less hard) than that of troilite. Average values of hardness of taenite particles in Y-790964 (LL) and Y-75258 (LL6) are 144 and 348kg/mm^2,respectively. The hardness increases as the Ni content increases. However, the range of hardness values in Fe-Ni particles shows little systematic changes with the petrologic type. The fractal dimension of two-dimensional shape of metallic particles was measured by the personal-computer-aided image processing system. The Vickers hardness varies in some systematic way. In shock-melted LL chondrites, when the amount of vesicles increases, the average of hardness decreases. Shock effects are heterogeneous even on a microscopic scale, and irregular grains (with higher values of the fractal dimension) seem to show shock effects more strongly.},
 pages = {254--263},
 title = {Hardness analysis of metallic particles in ordinary chondrites},
 volume = {3},
 year = {1990}
}