کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7898256 1510132 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stage-sensitive microstructural evolution of nanostructured TBCs during thermal exposure
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Stage-sensitive microstructural evolution of nanostructured TBCs during thermal exposure
چکیده انگلیسی
Nanostructured thermal barrier coatings (TBCs) often exhibit bimodal structure comprised of both nanozones and lamellar zones, and therefore, their sintering behaviour can be different from that of conventional coatings. In this study, changes in the microstructure and properties of nanostructured TBCs were investigated. The results show that their microstructural evolution is highly time-sensitive during long thermal exposure at 1150 °C. In stage I (0-20 h), changes in mechanical properties were significant. The dominant microstructural change was faster healing of flat pores, whereas the macroscopic structure seemed less affected. In stage II (20-500 h), the changes in properties were much slighter and some large macroscopic voids appeared. In brief, the microscopic healing of pores in lamellar zones leads to a significant change in mechanical properties in stage I, whereas sintering of the nanozones leads to macroscopic voids in stage II.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 9, August 2018, Pages 3325-3332
نویسندگان
, , , ,