ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The photon emission accompanying fracture of a polycrystalline MgO was investigated atroom temperature under N2 gas pressures from 10-4 to 105 Pa. At fracture, the ultraviolet, visible andinfrared photon emissions instantaneously increased, and then rapidly decreased in most of theexperimental conditions. However, in a N2 gas pressure of around 100 Pa, their peak counts lasted forabout 10 milliseconds, and the amount of the UV photon emission was fifteen times larger than thoseobtained in the other N2 gas pressures. This abrupt increment in the emission was explained by theluminescence due to N2 gas discharge according to the classical Townsend’s theory. In conclusion,the photon emission accompanying fracture of a polycrystalline MgO mainly originated from theexcited defects as reported by the authors previously, but the N2 gas discharge had a supplementaryeffect on the emission around a specific N2 gas pressure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.313.pdf
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