Cracking Behavior of Atmospheric Plasma-Sprayed 8YSZ Thermal Barrier Coatings during Thermal Shock Test
نویسندگان
چکیده
The failure of plasma-sprayed thermal barrier coatings (TBCs) during service is usually related to the cracking behavior. In this study, TBCs were prepared with two kinds agglomerated sintered yttria-stabilized zirconia (YSZ) powders different particle sizes. evolution mechanical properties and crack propagation behavior whole life stage studied by a shock test. effect powder size on was analyzed from aspect pore structure, properties, stress state coatings. coalescence in direction parallel substrate coating main factor leading spalling shock. Although fine YSZ has higher fracture toughness, lower strain tolerance will increase driving force tip shock, cracks propagate merge at faster rate larger porosity coarse help suffer less existence pores reduces toughness certain extent, growth coating, so longer life.
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ژورنال
عنوان ژورنال: Coatings
سال: 2023
ISSN: ['2079-6412']
DOI: https://doi.org/10.3390/coatings13020243