عنوان المقالة:تاثير الطاقة النوعية لليزر على تحسين الخواص لطلاءات الرش بالبلازما للزركونيا المستقرة جزئيا باليتيريا The influence of laser specific energy on laser sealing of plasma sprayed yttria partially stabilized zirconia coating
د.محمد كاظم جاسم, د.سامي ابراهيم الربيعي, د.علي سبع حمود
المؤلفون بالإنجليزي
Mohammed Jasim Kadhim , Sami Ibrahim Al-Rubaiey , Ali Sabea Hammood
الملخص العربي
تاثير الطاقة النوعية لليزر على تحسين الخواص لطلاءات الرش بالبلازما للزركونيا المستقرة جزئيا باليتيريا
الملخص الانجليزي
a b s t r a c t
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% yttria partially
stabilized zirconia (YPSZ) coatings; the effects of laser specific energy was investigated. The sealed
coatings were characterized by SEM, EDS, WDS, XRD and microhardness. It was possible to control the
cell size (or well-sintered ‘domain like’ structure), crack width, depth of sealing and depth of concavity
by carefully adjusting the specific energy. The microstructure of the sealed coatings was characterized
by a cellular structure at all laser parameters studied. Cracks formed under optimum specific energies
(1–2 J/mm2) were seen to be shallow and they do not penetrate through the plasma sprayed coating.
The sealed coatings have much lower roughness and higher hardness than non-treated coatings
indicating the beneficial effect of plasma treatment.
تاريخ النشر
13/09/2012
الناشر
Optics and Lasers in Engineering- ELSEVIER-Calrivate Analytics
أ.د. علي سبع حمود | Professor Dr. Eng. Ali Sabea Hammood | 9383