کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7887580 1509791 2018 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigations and thermodynamic calculations of the interface reactions between ceramic moulds and Ni-based single-crystal superalloys: Role of solubility of Y in the LaAlO3 phase
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Experimental investigations and thermodynamic calculations of the interface reactions between ceramic moulds and Ni-based single-crystal superalloys: Role of solubility of Y in the LaAlO3 phase
چکیده انگلیسی
It is commonly recognised that more reactive elements contained in Ni-based superalloy result in more-severe interfacial reactions, and thus more inclusions formed at the interface. However, the present work revealed that with rare-earth elements, specifically 0.24 wt% La+Y added to Ni-based superalloys, the interfacial reaction (~5 µm in thickness) between the ceramics and metal was retarded compared to the case of 0.12 wt% Y (~10 µm in thickness). Scanning electron microscopy, focused ion-beam transmission electron microscopy, and X-ray photoelectron spectroscopy were used to characterise the microstructure at the interface. Thermodynamic calculations of the Gibbs free energies of interfacial reactions were conducted. Experimental and theoretical results show that the solubility of Y in the LaAlO3 phase (>3.4 at%) hinders interfacial reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 7, May 2018, Pages 7667-7673
نویسندگان
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