507 多結晶MgOの破壊に伴い放出されるフォトンの波長分布に与える粒径の影響(セラミック/セラミック基複合材料2)

概要

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The photon emission during fracture was measured under the vacuum less than 1×10^<-4>Pa on single crystal MgO and polycrystalline MgO with three different sizes of grain, 33, 84 and 116μm. The emission intensity of the photons ranging from 300 to 850nm decreased with the grain size. The proportion of the UV photons (300 to 380nm) in the photon emission showed the maximum in the single crystal MgO, and decreased with the grain size in the polycrystalline. MgO. As the grain size became larger, the fraction of intergranular fracture was increased in the polycrystalline MgO sample. The result shows that the fracture mode influences not only the emission intensity, but also the wavelength distribution in the photon emission during fracture.
社団法人日本機械学会の論文
2007-11-16