youtor.org
Defects in materials
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=LqcHjquz8u8
0:00 demos for context about why we might care about defects and imperfections in materials • 9:42 calculating vacancy concentration and fraction from vacancy activation energy. • 11:33 example calculation of vacancy fraction • 16:36 vacancy amounts in metals • 17:31 vacancy vs self-interstitials in metals • 21:00 point defects in ceramics (Frenkel defect vs Schottky defect) • 23:21 atoms growing on surfaces (edge growth) • 26:36 non-stoichiometric materials with defects • 27:58 how vacancies relate to thermal expansion • 33:00 alloys • 35:55 determining whether dopant is substitutional or interstitial • 37:18 aliovalent substitution and associated defects (oxygen vacancies in YSZ)
#############################
