Details

Autor(en) / Beteiligte

• Aguilar, Marquez
• Vlasova, M.
• Reséndiz-González, M.C.
• Kakazey, M.
• Cruz, Mayorga
• Bykov, A.
• Tomila, T.
• Stetsenko, V.

Titel

Laser irradiation of SiC-MoSi2 composite ceramics

Ist Teil von

• Science of sintering, 2008, Vol.40 (3), p.271-281

Ort / Verlag

International Institute for the Science of Sintering, Beograd

Erscheinungsjahr

2008

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The influence of continuous IR laser irradiation (? = 1064 nm, P = 240 mW) on SiC-MoSi2 composite ceramics was investigated by X-ray diffraction, electron microscopy, atomic force microscopy, and X-ray microanalysis. The irradiation of specimens was carried out in air. It was established that, due to heating of the surface under laser irradiation, oxidation of SiC and MoSi2 and sublimation of SiO (SiO2) and MoO3 take place. Depending on the content of the components in the ceramics and the irradiation time, SiO2 or MoO3 layers form on the surface or disappear from it. For a long irradiation time, the oxidation and cleaning of the surface (sublimation of oxides) are cyclic in character. Proucen je uticaj kontinualne laserske infracrvene radijacije (? = 1064 nm, P = 240 mW) na SiC-MoSi2 kompozitnu keramiku koriscenjem rentgenske difrakcije, elektronske mikroskopije i atomske mikroskopije i rentgenske mikroanalize. Zracenje uzoraka izvrseno je u vazduhu. Odredjeno je da se desava oksidacija SiC i MoSi2 i sublimacija SiO (SiO2) i MoO3 usled grejanja povsine izlozene zracenju. U zavisnosti od sadrzaja komponenti u keramici i vremena zracenja formiraju se slojevi SiO2 ili MoO3 na povrsini li nestaje sa nje. Za duza vremena zracenja oksidacija i ciscenje povrsine (sublimacija oksida) su ciklicno karaktera.