I-X-Ray Diffraction
Imelela iziqephu zesitaki zedatha ye-Xray diffraction kumasampuli acwengileko nawonakelekile we-Metal (kwesokunxele) kanye neCeramic (Kwesokudla).
Amakhatriji eposi esikhungo se-ceramic, njengoba kwakubikezelwe ababhali, ahlala engaguquki ngokokwakheka kwamakhemikhali (akukho zimpawu zokubola noma izinguquko zamakhemikhali ku-300 °C no-600 °C).Ngokuphambene nesampula yensimbi iba noshintsho olucacile lokuqamba.
Njengoba kungabonwa idatha ye-XRD, amasampula e-ceramic abonisa ubuqotho besakhiwo sokubunjwa okungaguquki.Lokhu kuyinkomba yokuthi akukho shintsho ekwakhekeni kwekristalu njengoba ukuqina kanye nezikhundla eziphezulu zezindiza ezihlukanisiwe zihlala zifana.Sisebenzisa ukucolisiswa kwe-rietveld, sibona kuphethini yethu ye-XRD isigaba esivelele se-tetragonal esishiwo ngendiza (101).
Idatha ye-XRD iphinda ikhombise ukuthi kunesakhiwo esincane se-monoclinic esiqala ukuvela kusampula engu-600 °C ngenxa yendiza (111) e-engeli ephansi engu-2θ.Ekubaleni i-mol% kusukela ku-% yesisindo esinikeziwe (idatha ehlanganisiwe enikezwe i-Wonder Garden), kwanqunywa ukuthi isampula ye-Zirconia ingu-3 mol% Yttria doped Zirconia.Uma siqhathanisa iphethini ye-XRD nomdwebo wesigaba sithola ukuthi idatha eqoqwe ku-XRD ihambisana nezigaba ezikhona kumdwebo wesigaba.Umphumela ovela kudatha yethu ye-XRD uphakamisa ukuthi i-Zirconia iyinto ezinzile futhi engasasebenzi kulawa mazinga okushisa.
Witz Et al:Phase Evolution in Yttria-Stabilized Zirconia Thermal Barrier Coatings Ifundwe nguRietveld Refinement of X-Ray Powder Diffraction Patterns.Journal of the American Ceramic Society.
■Ithebula 1 - Ukubunjwa kwePosi Yesikhungo Sobumba
Kusuka kudatha ye-XRD, kutholwe ukuthi i-metallic material iyi-Brass.Kuzinhlelo zokusebenza zokushisa okuphezulu, kungaba ukukhetha okuvamile kodwa njengoba kutholakele, ukuwohloka kwenzeka ngokushesha okukhulu uma kuqhathaniswa nokuthunyelwe kwesikhungo se-ceramic.Njengoba kungabonwa esakhiweni esingu-600 ° C (isakhiwo sokuqala ngakwesokunxele), impahla iba nezinguquko ezinkulu.Nge-engeli ephansi engu-2θ, sikholelwa ukuthi iziqongo ezintsha zibangelwa ukwakheka kwe-ZnO (Zinc Oxide).Ku-300 °C ngesampula yethusi (isakhiwo se-XRD esingakwesokunxele) sibona ukuthi alukho ushintsho olungako olwenzekile uma kuqhathaniswa nesampula elimsulwa.Isampula lahlala lisesimweni esihle ngokomzimba namakhemikhali, libolekisa ekuzinzeni kwezinto ezibonakalayo ukusuka kumazinga okushisa asekamelweni kuya ku-300 °C.
